疑问代词：
疑问代词在句中起名词的作用，用来构成疑问句。常用的疑问代词有：　　 
what, who, whose, whom, which, whatever, whichever, whoever, whomever 　　
疑问代词在句中应位于谓语动词之前，没有词性和数的变化，除who之外也没有格的变化。 
what, which, whose还可作限定词。
Whose books are these on the desk?
桌上的书是谁的？
What was the directional flow of U. S. territorial expansion?
美国的领土扩张是朝哪个方向的？
What events led to most of the east of the Mississippi River becoming part of the United States?
哪些事件使密西西比河以东的大部分土地归属于美国？
疑问代词在句中起名词词组的作用，用来构成疑问句。疑问代词有下列几个：
指　人： who, whom, whose
指　物： what
既可指人又可指物： which

疑问代词说明：
一、无论是做疑问代词还是限定词，which 和 what 所指的范围不同。what所指的范围是无限的，而which则指在一定的范围内，例如：
Which girls do you like best?
你喜欢哪几个姑娘？
What girls do you like best?
你喜欢什么样的姑娘？

二、Whom是who的宾格，在书面语中，它作动词宾语或介词宾语，在口语中作宾语时，可用who代替，但在介词后只能用whom, 例如：
Who(m) did you meet on the street?
你在街上遇到了谁？（作动词宾语）
Who(m) are you taking the book to?
你要把这书带给谁？（作介词宾语，置句首）
To whom did you speak on the campus?
你在校园里和谁讲话了？（作介词宾语，置介词 后，不能用who取代。）

三、疑问代词用于对介词宾语提问时，过去的文体中介词和疑问代词通常一起放在句首，现代英语中，疑问代词在句首，介词在句未，例如：
For what do most people live and work?大部分人生活和工作的目的是什么？（旧文体）
What are you looking for?你在找什么？（现代英语）

四、疑问代词还可引导名词性从句，例如：
I can't make out what he is driving at.
我不知道他用意何在。
Can you tell me whose is the blue shirt on the bed?
你能告诉我床上的蓝衬衣是谁的吗？
Much of what you say I agree with, but I cannot go all the way with you.
你说的我大部分同意，但并不完全赞同。

疑问代词用法：
1. 疑问代词有who, whom, whose, which和what, 都是用来构成疑问句的：
Who is calling? 谁打电话来？
Whom do you want to speak to? 你想找谁接电话？
作主语时用who，作宾语时用whom，在口语中用who作宾语时也不少：
Who did you mean? 你指的是谁？
Who are you talking about? 你们在讲谁？
直接跟在介词后时只能用whom：
With whom did you come? 你和谁一道来的？
(口语中说“Who did you come with?时更多一些。)

2. 其他三个疑问代词可用作：
1)主语：
What’s your address? 你的地址怎样写？
Whose is better? 谁的好一些？
Which of these is yours? 哪一本是你的？
2)宾语：
What do you mean? 你是什么意思？
Which do you like better? 哪一个你更喜欢一些？
Whose have you chosen? 你选了谁的？
3)表语：
What’s her name? 她叫什么名字？
Whose is it? 这是谁的？
4)定语(这样用时有些字典标作形容词)：
What time does the train leave? 这列火车什么时候离开？
Which room shall we stay in? 我们住哪间房？
Whose passport is this? 这是谁的护照？

形容词：
简称adj.或a，形容词用来修饰名词或代词，表示人或事物的性质、状态，和特征的程度好坏与否，形容词在句中作定语，表语，宾语补足语。
她是一个好学生，她学习努力。She is a good student, and she works hard.
这辆自行车很贵。This bike is expensive.
对不起,我现在很忙。I am sorry, I'm busy now.
你为这次会议做好准备了吗? Have you got everything ready for the meeting?
形容词的语法功能：
一、作定语
He is the greatest writer alive.他是依然健在的伟大的作家。
Somewone else has done it.别人已经做了这事。
二、作补语
形容词做主语补足语和宾语补足语时,可以表示其现状、状态，也可以表示某一动作的结果，并常用在表示“认为，看待”的动词如believe，prove，consider等候。例如：
The news made her sad.这消息使他感到非常悲伤。
Don't marry young.不要早婚。
三、作状语
形容词或形容词短语可作状语，形容词作状语时，可以看作是“being+形容词”结构的省略，可表示时间、原因、条件、方式、强调或伴随状况等意义。例如：
Enthusiastic，they are co-operative.热心的时候他们是很合作的。
Rich or poor, young or old, we all have problems.不管是穷人还是富人，不管是年轻人还是老人，我们都有问题。
四、做表语
The ship was adrift on unknown seas．那艘船在陌生的海域漂流。
五、做主语
Old and young joined the discussion.
Rich or poor meant the same to him.作感叹语
Very good!Say it again.
Stupid!He must be crasy.

形容词的几个特殊用法：
most 同形容词连用而不用 the, 表示 " 极,很,非常, 十分"。
It's most dangerous to be here. 在这儿太危险。
I cannot do it, it's most difficult. 我干不了这件事，太难了。

"The+形容词比较级..., the+形容词比较级..." 表示 " 越... 就越..."。
The more you study, the more you know. 你学的越多, 就知道的越多。
The more I have, the more I want. 我越有就越想要有。
The more, the better. 越多越好。

" 形容词比较级 + and + 形容词比较级 ", 表示 " 越来越... "。
It's getting hotter and hotter. 天气越来越热了.
It's pity he is getting poorer and poorer. 真可怜他越来越穷了。
The computer is cheaper and cheaper. 计算机越来越便宜。
The more and more people focus on the meeting next year. 越来越多的人关注明年的会议。

主语+谓语(系动词)+as+形容词原形+as+从句。表示两者对比相同。
This box is as big as mine. 这个盒子和我的一样大。
This coat is as cheap as that one. 这件衣服同那件衣服一样便宜。
 I study English as hard as my brother. 我同我兄弟一样学习努力。

the + 形容词 表示某种人。
He always helps the poor. 他经常帮助穷人。
I like to have a talk with the young. 我喜欢同年轻人谈话。
The rich sometimes complain their empty life. 富人有时抱怨他们空虚的生活。
The police led the old man across the street. 警察领老人横过马路。

以-ly结尾的形容词
1） 大部分形容词加-ly可构成副词。但 friendly，deadly，lovely，lonely，likely，lively，brotherly，仍为形容词。
改错：(错） She sang lovely.　　           （错） He spoke to me very friendly.
　　 （对） Her singing was lovely.　　（对） He spoke to me in a very friendly way.
2）有些以-ly 结尾的词既为形容词，也为副词。
daily，weekly，monthly，yearly，early
The Times is a daily paper.
The Times is published daily.

too+adj.+to句型   “太…而不能”
  He is too young to go to school.
 =He isn’t old enough to go to school.
 =He is so young that he can’t go to school.

形容词的位置:
1.形容词一般放在名词前作定语  
单个形容词修饰名词时，一般要放在名词的前面。它们的前面常常带有冠词、形容词性物主代词、指示代词、数词等。例如：  
a red flower一朵红花
an interesting story一个有趣的故事  
six blind men 六个盲人
my own house我自己的房子
如果有两个或两个以上的形容词修饰一个名词时，则由它们和被修饰的名词之间的密切程度而定，越密切的形容词越靠近名词。
如果几个形容词的密切程度差不多则按音节少的形容词放在前面，音节多的形容词放在后面。  
2.当形容词所修饰的词是由some,any,every,no等构成的不定代词时，形容词必须置于名词之后。例如：  
    She has something new to tell me.她有一些新的情况告诉我。  
    I have nothing important to do today.今天我没有重要的工作要做。  
    Do you know anybody else here?这儿你还有认识的人吗？  
3.形容词后面有介词短语或不定式短语时，形容词必须置于名词之后。例如：  
    It is a problem difficult to work out.这是一道难以解决的问题。  
    Edison is a student difficult to teach.爱迪生是个很难教的学生。  
    This is a kind of flowers easy to grow.这是一种易栽的花。  
4.用 and 或 or 连接起来的两个形容词作定语时一般把它们放在被修饰的名词后面。起进一步解释的作用。例如：  
    All people,young or old,should be strict with themselves.  
    所有的人，无论老少，都应该严格要求自己。  
    We are building a new school, modern and super.  
    我们正在建一所现代化的高档次的新型学校。  
    All countries, rich and poor, should help one another. 所有的国家，无论穷富都应该互相帮助。  
5.有少数形容词，如enough和possible，既可置于所修饰的名词前面也可以置于它所修饰的名词之后。例如：   
Do you have enough time(time enough)to prepare?你有足够的时间做准备吗？   
Maybe it will be a possible chance(chance possible)for you.或许它将成为一次可能的机遇。
6.有些形容词，置于名词之前与之后，含义不尽相同。例如：  
the writer present 出席的作者  
the present writer 现在的作者
7.表示长，宽，高，深，及年龄的形容词，应放在相应的名词之后。
This river is about 100 metres wide.
The building is more than 50 metres tall.
 He is less than 40 years old.
8. enough修饰名词时，在名词前后都可以。
They said that they had enough food.= They said that they had food enough.
 enough 修饰形容词和副词，位于其后。
 He is old enough to join the army.
 He isn’t old enough to go to school.
9.形容词else通常放在疑问代词，疑问副词或不定代词后
 what/who/where/when/when else
 something/anything/nothing…else
 What else did you do?
 Do you have anything else to say?
10.由两个或两个以上的词组成的形容词词组修饰名词时须放在名词之后。
This is the book easy to read.
这是一本容易读的书。

形容词知识拓展:
名词化的形容词：
有些形容词可以和定冠词连用，表示一类人或事物，这时，它相当于一个名词，可作主语或宾语；
表示一类人时，看作复数，表示一类事物时，通常看作单数。
Robin Hooh(罗宾汉) hated the rich and loved the poor.
The old are taken good  care of in American.
the+形容词，常见的短语有：
the old/the young/the sick/the white/
the black/the rich/the poor/the dead(死者)

形似副词的形容词：
以-ly结尾的词通常是副词，但是下列词为形容词。
friendly  lonely (孤独的) ；lively (活着的)；lovely(可爱的)

复合形容词的类型：
(1)名词+过去分词  man-made satellite 人造卫星
(2)形容词+现在分词  a good-looking man
(3)形容词+名词  second-hand cars
(4)数词+名词-ed   three-legged chairs三条腿的椅子
(5)数词+名词  400- metre race
(6)副词+现在分词  hard-working students
(7)副词+过去分词  well-known writers
(8)形容词+形容词  a dark-red jacket
(9)形容词+过去分词  ready-made clothes 成品服装

含有形容词的常用句型：
(1) It’s+adj. of sb. to do sth.
(good/ kind/nice/polite/clever/foolish… )
It’s very kind of you to help me.
(2) It’s +adj. for sb. to do sth.
(difficult/easy/hard/dangerous/usefulinteresting/important…)
It’s important for us to learn English well.
(3)下列形容词后常跟动词不定式
 表示情感或情绪的形容词：glad,pleased,sorry,sad,afraid,thankful…
 I'm glad to see you.
表示能力，意志或推测的形容词：ready,able,sure,certain…
 I’m sorry to hear that.

某些现在分词和过去分词可作形容词
the moving story 令人感动的故事
a moved boy   一个被感动的男孩
a frightened child 一个被吓到的孩子
a frightening film 一个恐怖电影

特殊疑问句：
以特殊疑问词开头，对句中某一成分提问的句子叫特殊疑问句。
常用的疑问词有：what、who、whose、which、when、where、how、why等。
特殊疑问句的基本结构是“疑问词+一般疑问句”。
其回答应当是具体的。特殊疑问句句末一般用降调。 
例如：How do I get there? 
            Why not? 
            What about the sports news?
常用疑问词可先分为3种:
疑问代词：
what（什么）
who（谁，作主语）
which（哪个，在一定范围内选择）
whose（谁的，指附属关系）
whom（谁，作宾语）

疑问副词：
when（何时，询问时间）
where（何地，询问地点）
why（为什么，询问原因）
how（如何，询问手段，方式，工具以及程度）

疑问形容词：
what（which，whose）+名词
例词：
what time（什么时候） what colour（什么颜色）... ...
how much（多少） how long（多长）...
特殊疑问句的特点：
一、 特殊的疑问词：
特殊疑问句要由疑问代词或疑问副词开头，询问的内容不同, 使用的疑问词也不同。
我们学过的疑问词有what（询问事物）, how much（询问价格）, what time （询问时间，尤其是点钟）, what kind of（询问种类）, why（询问原因），who（询问人）, where（询问地点） 等等。如：
—What is this? 这是什么？
—It's a key. 这是一把钥匙。
—How much is it? 这个多少钱？
—It's twenty dollars. 二十美元。
—What kind of movies do you like? 你喜欢哪一类型的电影？
—I like action movies. 我喜欢动作片。

二、特殊的语序：
特殊疑问句由疑问词开头，其构成是“疑问词 + 一般疑问句”。如：
What time is it？ 现在几点钟？
Who is your teacher? 谁是你的老师？
特殊疑问句有两种语序：
1．如疑问词作主语或主语的定语，即对主语或主语的定语提问，其语序是陈述句的语序：
Who is singing in the room﹖
whose bike is broken﹖
2．如疑问词作其他成分，即对其他成分提问，其语序是：
特殊疑问词+一般疑问句(特殊疑问词+be/助动词/情态动词+主语+谓语)
What does she like?
What class are you in﹖
Where are you from﹖
What time does he get up every morning﹖
How do you know﹖
 
三、特殊的答语：
特殊疑问句不能用yes, no来回答，而应根据它所询问的内容直接做出回答才行。如：
— What time is it, please? 请问几点了？
— It's 7:30. 七点半了。
— Where are they? 他们在哪儿？
—They're in the playground. 他们在操场上。
—What's your favorite subject? 你最喜爱的科目是什么？
—English. 英语。

四、 特殊的语调：
一般情况下，特殊疑问句要用降调（↘）来读。如：
Who's ↘that?
How old is↘Jack?

“It”用法及其句型和固定搭配，是英语语法的重点、难点，又是近几年考试的热点，因此在复习中应给予足够的重视。
It 句型归纳：
1． It is ＋adj．(＋for sb．／sth．) ＋ to do sth．
用于此句型的形容词有：easy， hard， difficult，possible， important， impossible， necessary， good， bad， exciting， interesting， surprising等。如：
 It is necessary to change your job．
 It was very hard for them to walk such a long way in the snow．
2．It is ＋n．(＋for sb．／sth．) ＋ to do sth．
用于此句型的名词有： pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。如：
 It is a pity for you to have missed such a wonderful play．
 It is bad manners for the young to take up the seats for the old．
3．It is ＋adj．＋of sb．＋to do sth．
此句型中的形容词主要描述某人的品德、特征。能用于该句型的形容词有： kind, nice, wise,
silly, polite, impolite, friendly, foolish, clever等。如：
 How silly it was of you to give up such a good chance！
 It is friendly of the family to try to make me feel at home in their house．
4．It is ＋adj．（＋n．）＋doing sth．
此句型中的形容词和名词常见的有：no／little use, no／much good, useless等。如：
 It’s no use crying over spilt milk．
5．It takes sb．＋一段时间＋to do sth． 表示“做某事花费某人多长时间”。如：
It took us half an hour to ride to the town by the sea．
6．It is ＋及物动词的过去分词＋that从句
此句型中常见的及物动词的过去分词有：said, told, known, reported, recorded, thought, believed, considered等。如：
It is reported that the Russian President will visit China next week．
7．It ＋不及物动词＋that从句
此句型中不及物动词常见的有：seem， happen， appear， matter等。如：
 It seems that there will be a heavy snow tomorrow．
 It happened that I met my good friends in the museum yesterday．
8．强调句型：It is＋被强调部分＋that／who从句
在使用强调句型时要注意，指人时可以用who或that，其它情况一律用that。如：
 It was under the bed that my brother hid the ball this morning．
 It is Mr Bell who／that often comes and looks after the old man．
9．It is／has been＋一段时间＋since从句。如：
It is ／has been three years since we saw each other last．
10．It is (high) time that sb． did sth．
该句型表示“某人现在该做某事了”，从句常用过去时（虚拟语气）说明现在应该做的事情。如：
 It’s six o’clock．It is high time that we went home now．

It 常用的固定搭配：
1. make it
（1）在口语当中相当于succeed，表示：成功、做到、说定、赶上、及时到达
例  It's hard to make it to the top in show business.
（2）在口语中相当于fix the date for，表示“约定好时间”
例  —Shall we meet next week？
—OK. We just make it next Saturday.
2. as it is
（1）相当于in fact，in reality表示“事实上，实际情况是……”
例  We had planed to finish the task today，but as it is we probably won't finish it until next week.
（2）相当于方式状语从句，表示“照原样”
例  Leave the table as it is.
3. as it were
相当于as one might say，that is to say，表示“也就是说，可以说，换句话说”
例  He is，as it were，a modern Sherlock Holmes.
4. if it weren't for…/if it hadn't been for…
用来引导虚拟语气，相当于without，or but for，表示“如果不是……，要不是……”
例  If it weren't for Tom，I wouldn't be alive today.
5. that's it
（1）相当于That's all. That's so much. 表示“至此为止，没有别的了”
例  You can have one more sweet，and that's it.
（2）相当于 That's right.表示“对啦”
例  — I guess the key to the problem is thechoice “A”
—That's it.
6. catch it
在口语中，相当于be punished/scolded for doing sth. wrong. 表示“因做错事而挨骂，受责备，受批评，受惩罚”
例  We'll really catch it form our teacher if we're late for class again.
7. have it
（1）相当于say，insist表示“说，主张，表明，硬说”
例  Rumour has it that they are getting divorced.
（2）相当于get to know something，表示“了解，知道，获悉”
例  I had it from John that she was going abroad.
8. have what it takes
在口语中，相当于be well qualified for，表示“具有成功的条件”
例  You can take it from me that your daughter has what it takes to be a star.
9. so it seems / appears.
10. Keep at it！（Don't give up！）
相当于go on，表示“继续做，不放弃”
例  My teacher asked me to keep at it.
11. Go it！（Go on！）拼命干，莽撞
12. Now you have done it！（You have done sth. wrong.）
13. Now you'll catch it！（You'll be punished.）
14. As it happened，…
在口语中，相当于it's a pity that…，表示“真不凑巧，真遗憾”
例  As it happened，they were out.
15. As it turned out，…
在口语中，相当于it was found to be in the end，表示“最后被证明是”
例  As it turned out，his statement was false.
16. Such as it is（they are）
在口语中，相当于although it may not be worth much，表示“虽然没有多大价值”
例  You can borrow my exam notebook，such as it is.
17. Take it/things easy.
相当于Don't worry or don't hurry. 用来劝告别人，表示“不要慌，别担心，存住气”
例  Take it easy！ He will do it well.
18. Take it from me.
在口语中，相当于believe me what I say.表示“请相信我的话，我敢担保”
例  You can take it from me that he will make it this time.
19. For what it is worth…
在口语中，相当于although I'm not sure it's of value，表示“不管其价值如何”
例  Here is the article I promise you，for what it's worth.
20. Worth it
在口语中，相当于useful，表示“有好处，值得做”
例  Don't hesitate about it！ It's worth it.
21. Believe it or not.表示“信不信由你”
例  Believe it or not，Tom is getting married to Mary next Sunday.
22. Take it or leave it. v. 要么接受要么放弃
例  That is my last offer. You can take it or leave it.
23. It all depends/that all depends
在口语中，相当于it hasn't been decided yet，表示“那得看情况，还没有定下来”
例  —Are you going to the countryside for holiday？
—It/That all depends.
24. It's up to sb.
在口语中，相当于it's decided by sb. 表示“由……决定，由……负责，取决于……”
例  —Shall we go out for dinner？
—It's up to you.

it用法小结：
It用作实词
表达以下概念:
指代前文提到的事物，前文中的this, that；
替代前文中的内容；
指代一位性别不明的小孩或未知的人；
指代未指明但谈话双方都知道的那件事；
指代时间、天气、气候、距离等自然现象。

一、it 作人称代词的用法
1. 指事物
作为人称代词，it 可以除人以外的一切事物或动物。如：
I dropped my watch and it broke. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。
“Where is the dog?” “It’s in the bedroom. ” “狗在哪?”“在卧室里”。
2. 指人
it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如：
Is it a boy or a girl? 是男孩还是女孩?
There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。
【说明】在答语中，常用来指本人，如说 It’s me。
3. 代替某些代词
代词 it 还可用于代替指示代词this, that 以及复合不定代词 something, anything, nothing等。如：
“What’s this?” “It’s a new machine. ” “这是什么?”“是一种新机器”。
Nothing is wrong, is it? 没出什么问题，是吗?

二、it 作非人称代词的用法
1. 基本用法
it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如：
It’s too late to go there now. 现在去那儿已经太迟了。
It rained all day yesterday. 昨天下了一天的雨。
It can get very hot here. 这里有时会很热。
2. 用于某些句型
It’s time for sth. 该做某事了。
It’s time to do sth. 该做某事的时候了。
It’s time for sb to do sth. 某人该干某事了。
It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”)
It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
It’s + 时间段 + since-从句. 自从……有一段时间了。
It’s + 时间段 + before-从句. 过多长的时间才……

三、it用作形式主语
1. 基本用法
当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。如：
It’s very important to remember this. 记住这一点很重要。
It’s hard work climbing mountains. 爬山是费劲的事。
It’s unknown when he will come. 他什么时候来还不知道。
2. 用作形式主语的的重要句型
(1) It + be + adj. for (of) sb to do sth 某人做某事……
It is hard for him to make up his mind. 他很难下定决心。
It was foolish of her to say such a thing. 她说那样的话，真是太蠢了。
【说明】介词 of 与 for 的区别是：
of 用于指某人的性格、属性、特征等，介词for表示对象，意为“对……来说” 。
(2) It takes sb + 时间段 + to do sth. 某人做某事花了……时间
It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。
【说明】此句型可以有以下多变种变体：It took me an hour to write the letter.
=The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时
(3) It is up to sb to do sth. 该由某人做某事
It’s up to you to to make the choice. 得由你来作选择。
(4) it look (seem, appear, happen, occur) that [as if]… 似乎……
It seemed as though he didn’t recognize me. 他似乎没认出我来。
It happened that I was out when he called. 他打电话时我碰巧不在家。
(5) If it were not for… / If it hadn’t been for… 若不是因为……
If it were not for their help, we couldn’t have got over the difficulties. 要不是他们帮助，这些困难我们不克服不了的。

四、it用作形式宾语
1. 基本用法
当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，而将真正的宾语移至句末。
其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如：
I find it difficult to do the job well. 我发现做好这件事不容易。
I think it best that you should stay here. 我认为你最好住这儿。
We think it no use complaining. 我们认为抱怨是没有用的。
2. 用作形式宾语的几个特殊结构
(1) 动词+ it + that-从句。如：
I like it that you came. 你来了，我很高兴。
I take it (that) he will come on time. 我认为他会准时来的。
You can put it that it was arranged before. 你可以说这是以前安排的。
Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。
【说明】能用于此结构的动词不多，常见的有 have, take, put, like 等。
(2) 动词 + it + when (if)-从句。如：
I dislike it when you whistle. 我不爱听你吹口哨。
We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。
I’d prefer it if I didn’t have to do so much work. 要是我不必做那么多工作，好就太好了。
【说明】能用于此结构的动词不多，常见的有 enjoy, hate, love, like, dislike, appreciate, prefer 等。
(3) 动词 + prep + it + that-从句。如：
See to it that you’re not late again. 注意千万不要再迟到。
Look to it that this doesn’t happen again. 注意不要再发生这种事。
You may rely on it that he’ll come to meet you. 你放心，他会来接你的。
I can’t answer for it that he will come. 我不能保证他会来。
【说明】能用于此结构的动词不多，常见的有see to, look to, insist on, stick to, depend on, answer for 等。
(4) 动词 + it + 介词短语+ that-从句。如：
I owe it to you that I am still alive. 多亏有你我才仍然活着。
I took it for granted that he would help us. 我认为他会帮助我们的。
【说明】能用于此结构的动词不多，常见的有take it for granted, bring it to sb’s attention, owe it to sb 等。

it在强调句中的使用
It is＋被强调部分＋that(who)＋其他
在使用强调句型时需注意以下几点：
1. 请注意强调句型的特殊疑问句 
2. 在强调原因状语从句时，只能强调由because所引导的从句。
3. 在强调not … until结构时必须把not与until一起放到被强调的位置上。
4. 注意强调句型与定语从句的区别。
5. 不管被强调部分是单数还是复数，其前一律用It is / It was，而不能用They are / There were之类的。
6. 被强调部分是指人时，被强调部分后可用that / who，被强调部分指物时，被强调部分后只能用that。
7. 被强调部分是指时间或地点时，被强调部分后通常用that，一般不用when，where之类的。例：
It is I who am right. 是我对。
It was you that were wrong. 是你错了。
It was in the Japan that he died. 他是死于日本。
It was yesterday that he got married. 他是昨天结婚的。
It was a computer that he bought last week. 他上个星期买的是一台电脑。
Where was it that she lived? 她是住在什么地方?
When was it that he left for Japan? 他是什么时候离开去日本的?
Who is it that teaches you English? 是谁教你们英语?

倒装句：
为了强调、突出等语的目的而颠倒原有语序的句式叫做倒装句。在倒装句中，颠倒了的成分可以恢复原位而句意基本不变，句法成分不变。

倒装句使用情况：
A. 在疑问句中
各种疑问句一般地说都是倒装语序。例如：
Will they come to see us this weekend ? 这个周末他们将来看我们吗？
Are you talking about the film you saw last Monday ?
你们是在谈论你们上周一看的那部电影吗？
Can you speak another foreign language except English?
除开英语，你还能说另一种外语吗？
Where did you buy the dictionary, in the book store nearby or in Xinhua bookstore?
你在哪儿买的这本词典，是在附近的书店还是在新华书店？
She is not a student, isn't she ? 她不是个学生，对吗？

B. 在感叹句中
某些感叹句也用倒装语序。例如：
Isn't it a beautiful garden ! 多么美丽的花园啊！
What a beautiful garden it is ! 多么美丽的花园啊！
（在这种句式中，主语在谓语之前，属于自然语序。对于主语和谓语而言，语序没有倒装。）
Have you ever seen such a naughty kid like him ! 你见过那个孩子像他这么调皮！

C. 在陈述句中
陈述句在一般情况下用自然语序；但由于英语语法的某些原因，陈述句也要使用倒装语序。这些原因大致可以归纳如下：
1) 为了避免句子部分内容不必要的重复，常用"so + be动词（助动词、情态动词）+主语"或"neither / nor + be动词（助动词、情态动词）+主语"的倒装句式。
其中第一个句式表示"与前面所述的肯定情况相同"， 第二个句式表示"与前面所述的否定情况相同"。例如：
His brother is a college student; so is mine.
他弟弟是大学生，我弟弟也是。
His brother is not a college student; nor is min .
他弟弟不是大学生，我弟弟也不是。
He used to have his further study abroad; so did I.
他曾去国外深造过，我也去过。
He didn't use to have his further study abroad; neither did I.
他没去国外深造过，我也没有。
One of my friends can speak three foreign languages; so can his wife.
我的一个朋友会说三门外国语，他的妻子也会。
One of my friends cannot speak three foreign languages; neither can his wife .
我的一个朋友不会说三门外国语，他的妻子也不会。
They are now preparing for their final examinations; so are we .
他们正在为期末考试作准备，我们也一样。
They are not now preparing for their final examinations; nor are we .
他们没在为期末考试作准备，我们也没有。

2）具有否定意义的词或短语置于句首时（除否定词修饰主语外），句子一般要写成部分倒装句。
这类词或短语常见的有：
not, never, seldom, hardly, rarely, scarcely, by no means, under no circumstances, in no way, at no time, no sooner … (than), hardly … (when), not only … (but also), not until… ,等。例如：
Hardly had she sat down when she heard someone knocking at the door .
她还没来得及坐下来，就听见有人敲门。
Not until twelve o'clock did he go to bed last night .
他昨晚直到十二点钟才睡觉。
Never have my sisters been to Hong Kong before .
我的妹妹们以前从未去过香港。
No sooner had I returned home from New Zealand than I bought a house and went to live there.
我从新西兰一回国，就买了一栋房子并在那儿住下了。
So far as I know, seldom does Mary come back to see her mother.
就我所知，玛利几乎很难回来看她妈妈。
Scarcely a drop of rain fell here last fall . （否定词修饰主语时，句子不用倒装。）
去年秋天，这儿几乎没下一滴雨。

3）当so, often, only等表示程度、频率的副词放在句首时，句子一般要倒装。例如：Only in this way can you come up with a solution to the problem.
只有这样，你才有可能想出解决这个问题的办法。
So serious was the situation that everybody faced a test.
形势如此地严峻，每个人都面临着一场考验。
So hard did he overwork that he fell ill at last. 他太操劳过度以致最后病倒了。

4）当there, here, then, now等副词在句首，且谓语是come, go, be等动词时，句子一般要全部倒装。
其意义在于引起他人的注意。如果这类句子的主语是代词，则不用写成倒装句。例如：
Now, here goes the story.这个故事是这样的。
Look, there comes the taxi.瞧，出租车过来了。
Then came another question.然后又一个问题提出来了。
Then followed the four-year War of Liberation.接下来是四年的解放战争。

5) 当out, in, away, up, bang等表示方位或拟声词放在句首时，句子一般要全部倒装。
这类句子比自然语序的句子更为生动、形象。但如果这类句子的主语是代词，则不用写成倒装句。例如：
Bang goes my ace.我砰地一下打出了"爱司"。
Away flew the bird.那鸟飞走了。
Suddenly, in came a man with a mask on his face.突然进来一个蒙着面具的人。

6) 其他情况还有：省略了if的虚拟条件句、某些表示祝愿的句子、以及某些让步状语从句，等等也要用倒装句式。例如：
（省略了if的虚拟条件句）Had they not helped us, we could not have done it so successfully.
如果没有他们的帮助，我们不可能把那件事办的如此成功。
Should he come, say "Nobody in" to him.
万一他来了,对他说："公司没人。"
（某些表示祝愿的句子）May our friendship last forever.
愿我们的友谊常存！
May your company become prosperous.
祝贵公司生意兴隆！
（某些让步状语从句）Try as I might, I couldn't lift the stone.无论我使多大的劲，我也无法搬起那块石头。
They said they would follow the Party's lead come what might.
他们说无论发生什么情况，他们都会跟党走的。

7) 由于修辞或是平衡句子的原因也可以用倒装句；也可以不用。这不是一条必须的规定。
Next to this one is another grand hotel which is beautifully decorated .
家饭店隔壁还有一家装修华丽的大饭店。
On either side of the great avenue stood many block buildings.
这条大街的两侧都耸立着许多综合楼。（这类句子也可以不用倒装句。）
"I'm leaving for Beijing tomorrow," said Tom to his mother (OR: Tom said to his mother) .
汤姆对他妈妈说："我明天动身去北京。"
Many block buildings stood on either side of the great avenue.
许多综合楼耸立在这条大街的两侧。
Another grand hotel, which is beautifully decorated, is next to this one .
这家饭店隔壁还有一家大饭店，那家饭店装修十分华丽。

完全倒装与部分倒装:
1.完全倒装（Full Inversion）：又称"全部倒装",是指将句子中的谓语全部置于主语之前。此结构通常只用于一般现在时和一般过去时。
谓语+主语+……
①There be（的各种形式）+主语（+地点或时间状语）
例子：
There was a drop in the temperature.温度下降了
There are brids singing in the tree.鸟儿在树上唱歌。
②副词小品词+谓语动词+名词主语+……
③过去分词或现在分词+be的各种形式+主语+……
2.部分倒装（Partial Inversion）（又称半倒装句）：
指将谓语的一部分如助动词或情态动词倒装至主语之前,而谓语动词无变化。
如果句中的谓语没有助动词或情态动词，则需添加助动词do,does或did，并将其置于主语之前。
英语句子的倒装一是由于语法结构的需要而进行的倒装，二是由于修辞的需要而进行的倒装。
前一种情况,倒装是必须的，否则就会出现语法错误；
后一种情况，倒装是选择性的，倒装与否只会产生表达效果上的差异。
倒装的作用:
通常是希望强调句中的某一部分
1. 当以there, here, out , in , up , down, away 等副词开头的句子，为了起到强调的作用，可构成倒装句，只把副词放在句首，主语和谓语位置调换，不加助动词。
Our teacher came in.
In came our teacher.
这种倒装要求：主语必须是名词。主语是人称代词时，主语和谓语语序不变。
Here it is.
Away he went.
这类倒装句式一般只用一般现在时和一般过去时。
Here comes the bus.
Out rushed the boys.

2. how, then, just, often 表示时间的副词放在句首，可构成倒装句，只把副词放在句首，主语和谓语位置调换，不加助动词。
Then came 8 years of the Anti Japanese War.

3. 表地点状语的介词短语放在句首，要用倒装句式，以示强调。
这种倒装句也是主谓直接调换位置，不加助动词did, does或do.
Under a big tree sat a fat man  half asleep.

4. there放在句首时，要用倒装句式。
在“there + be”结构中的谓语动词有时不用be , 而用表示类似“存在”观念的其他不及物动词。如：
live, stand, come, lie, flow, enter, rise 和appear等。
There came shouts for help from the river.
There lies a large wheat field in front of the house.
Many years ago there lived an old man in the wooden house.
In front of the tower flews a stream.

5. so + 动词+主语
neither/ nor + 动词+主语
表示两人的同样一个情况时，只能表示一件事，即上、下句所使用的动词、时态要一致。
否则要用so it is with…
You can ride a bike. So can I .
He has been to Beijing. So have I .
The first one isn’t good, neither is the second.
His uncle is a worker and has been working in the factory for more than ten years. So it is with his aunt.

6. so+ 形容词/副词that 的结构状语从句可以用正常语序表示，也可以把so+形容词/副词放于句首构成倒装。
句型如下： so +形容词/副词+be/助动词/情态动词that +从句。
Light travels so fast that it is difficult for us to imagine its speed.
= So fast does light travel that it is difficult for us to imagine its speed.
So easy was the work that they finished it in a few days.

7. done做形容词在句中做表语时，常把表语放在句首，要用倒装句式。
Gone forever are the days when the Chinese people had to use foreign oil.

8. 否定副词not , never, seldom, nowhere, little , rarely 放于句首时要用倒装句式。
We seldom get up at four in the morning.
= Seldom do we get up at four in the morning.
Not a single word from him could the enemy drag.
Rarely have I heard of such a silly thing.

9. hardly…when; scarcely…when…; no sooner…than… 可以用正常语序 had hardly done when… did 或用倒装句式Hardly had + 主语+ done when… did 句式。
hardly所在的句子用过去完成时。
The bell hardly had rung when the class began.= Hardly had the bell rung when the class began.
No sooner had he arrived in Beijing than he began to work.

10. not only… but also 如连接两个成分时，不用倒装；连接句子时，前面的句子要用倒装。
Not only was everything that he had taken away from him, but also his German citizenship.
Not only is he busy, but also I have a lot of work to do.
Not only does he speak English very well, but also he speaks French well.

11. only 及所修饰的副词、介词短语或状语从句放在句首时，要用：
only+ 状语+ be /助动词/情态动词+主语及其他
Only when he told me the news did I know what had happened.
Only in this way can you make progress in your English.

12. 虚拟语气中的倒装句
If I were you, I would take the job. = Were I you, I would take the job.

选择疑问句：
是指提出两个或两个以上可能的答案供对方选择的句式。
一种是以一般疑问句的结构形式为基础，只是在语调上有所区别。
这一类选择疑问句通常都是在前一个供选择的答案用低升调，后一个用降调；
如果有两个以上供选择的答案，则在最后一个用降调，其余都用低升调。
另一种是以特殊疑问句为基础。Or连接的两个并列成分可以是状语、宾语、表语、谓语或数两个句子等。
例如：
Do you want to live in a small town or a big city?
Which ocean is deeper, the Atlantic or Pacific?

选择疑问句的结构：
1、“一般疑问句+or+另一个备选对象”。例如：
Shall we go there by bus, bike or train?
我们乘公共汽车、自行车还是火车去？（备选对象为三者）
Would you like some tea or coffee?
你要茶水还是咖啡？ （备选对象为二者）
Did you stay at home or at school yesterday? 
你昨天呆在家还是在学校？（备选对象为二者）

2、“特殊疑问句+or+另一个备选对象”。例如：
Which would you like best, English, Chinese or Math?
你最喜欢哪门学科，英语、语文还是数学？ （备选对象为三者）
When will you go to Canada, Sunday or Monday？
你何时去加拿大，星期天还是星期一？（备选对象为二者）
选择疑问句是在一般疑问句或特殊疑问句后面用并列连词or加上一个备选对象构成的，要注意和一般疑问句或特殊疑问句结构的区别。

选择疑问句的回答：
回答选择疑问句时，一般在所提供的备选对象范围内选择，有时也要视具体情况作灵活处理，但不能用Yes / No来回答；
一般用一个完整的陈述句或其简略形式，主语和谓语均省略。
常用的不定代词有all（三者或三者以上都）, both（二者都）, either（二者中任意之一）, neither （二者都不）, none（三者或三者以上都不）。
在运用时要由上下文的语境来决定使用哪一个不定代词。
1、从备选对象中选择其中某一项回答。
─ Are you going to borrow a dictionary or a magazine?
─ ____.
A.  Yes, a dictionary       
B. No, a magazine
C.  A magazine           
D. Yes, both
分析：选项A, B, D不能回答选择疑问句。选项C是从备选对象中选择了其中的一项来回答的，符合语境。故选择C选项。

2、选对象是二者，可任选其一就用表示肯定的either；两个对象都选就用表示肯定的both；
两个对象都不选就用表示否定的neither。
─Would you like chicken noodles or beef noodles?
─____. I’d like tomato noodles.
A. Either   
B. Neither   
C. Both   
D. None
分析：备选对象是二者，先排除D。由“我要西红柿面条”可知，要否定上面提供的备选对象。而A和C选项不符合上下文的逻辑，故选B。
─Which do you like better, Math or Physics?
─_____. I’m interested in them and quite good at them.
A. Both    
B. None    
C. Either   
D. All
分析：备选对象是二者，先排除B和D。由“我对它们感兴趣，而且学得相当好”说明“我喜欢数学和物理”，C不符合逻辑，故选择A选项。
─When shall we go to the museum, this afternoon or tomorrow morning?
─____ is OK. I’m free these days.
A. Both    
B. All     
C. Either    
D. Neither
分析：备选对象是二者，先排除B。下句中动词is不能和both搭配，A也要排除。由“_____ 都可以。这几天我都有空。”
可知，空格处填肯定词either，意为“今天下午和明天早上任意一个时间都可以。”选项D 表否定不符合上下文的逻辑，故选C。

3、如果备选对象是三者，可任选其一时，就用one of them（他〈它、她〉们中任意之一）；三个对象都选就用all；三个对象都不选就用none。
─Which do you like best, coffee, water or juice?
─_____. I only like tea.
A. Both   
B. Either   
C. Neither    
D. None
分析：备选对象是三者，排除A, B, C。选择D选项，意为“咖啡、水和果汁都不喜欢。我只喜欢茶水。”

主语从句：
在复合句中充当主语成分的句子叫做主语从句。常规主语从句，即句子在复合句中充当一个主语。 主语从句的时态：不受主句的时态影响和限制。 
例如：
That he finished writing the composition in such a short time surprised  us all. 
What we need is time. 
It is certain that he will win the match. 
(1) 引导主语从句连词有that,whether,who,what,whatever等 　　 
(2) 连词位于句首不能省略 　　 
(3) 主语从句大多数情况下视为第三人称单数

主语从句引导词：
1、由连词that引导的主语从句。
例如：That you will win the medal seems unlikely.
你想获得奖牌看起来是不可能的。
That you are so indifferent bothers me.
你如此冷淡使我很烦恼。
That she survived the accident is a miracle.
她在事故中幸免于难简直是奇迹。
2、用连接代词或连接副词if, whether 引导的主语从句。
例如： Which of them escaped from the prison is still a mystery.
他们哪一个是从监狱里逃跑的，仍然是个谜。
When they will come hasn’t been made pubic.
他们什么时候来还不知道。
Whether she is coming or not doesn’t matter too much.
她来不来都无关紧要。
3、用关系代词引导的主语从句。
例如：What you need is more practice.
你所需要的是更多的训练。
What I want to know is this. 我想知道的就是这事。
Whatever we do is to serve the people.
我们无论做什么都是为人民服务。
4、主语从句可以直接放在主语位置上，也可以用it作形式主语，而将从句放在句末（尤其是当谓语较短时）。
例如：That light travels in straight lines is known to all.
光沿直线传播，这是众所周知的事。
=It is known to all that light travels in straight lines.
众所周知光沿直线传播。
When the plane is to take off has not been announced .
飞机何时起飞还没有宣布。
= It has not been announced when the plane is to take off.
还没有宣布飞机何时起飞。
当what引导的主语从句表示“…的东西”时，一般不用it作形式主语。
错:It is a book what he wants.
对:What he wants is a book. 他想要的是本书。
如果带主语从句的句子是疑问式，则必须用it作形式主语的结构。
例如：Has it been settled who will be sent to carry out the task ?
谁将被派去执行这项任务决定了吗 ？
主语从句与宾语从句区别：
主语从句与宾语从句两者的用法和在句中的作用是不同的，下面从它们的各自用法来介绍。
一．主语从句
主语从句 定义：在句子中担当主语的是一个从句，这个从句就叫做主语从句。
主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
1. It 作形式主语和it引导强调句的比较
①主语从句常用it作形式主语，一般常用句型为：It is+{名词/形容词/过去分词}+主语从句例如：
It is still a question whether she will come or not.
It is strange that you should like him.
It is still unknown which team will win the match.
另外，还有一些比较多见的结构：
It turned out that……;
It has been proved that……;
It happened/occurred that……;
It is well-known that……等等
②而强调句则不同，它的结构是：It+be+被强调部分+that+从句
强调主语：It is the times that produce their heroes.时势造英雄
强调宾语：It is English that Prof.Lin teaches us.
强调状语：It was in shanghai that I saw the film.
判断是否是强调句有一个方法，就是将that以后的“句子的其余部分”拿出来单独看，看有没有缺成分，缺的是什么成分，再把谓语动词后面that前面的那部分，带到你认为缺成分的地方，如果放进去是一句完整的句子了，那就说明是强调句。

2. 用it 作形式主语的结构
(1) It is +名词+that从句
It is a fact that … 事实是……
It is an honor that …非常荣幸
It is common knowledge that …是常识
(2) it is +形容词+that从句
It is natural that… 很自然……
It is strange that… 奇怪的是……
(3) it +不及物动词+that从句
It seems that… 似乎……
It happened that… 碰巧……
(4) it is+过去分词+that从句
It is reported that… 据报道……
It has been proved that… 已证实……

3.主语从句不可位于句首的五种情况
(1) if 引导的主语从句不可居于复合句句首。
(2) It is said , (reported) …结构中的主语从句不可提前。例如：
It is said that President Jingo will visit our school next week.
(3) It happens…, It occurs… 结构中的主语从句不可提前。例如：
It occurred to him that he failed in the examination.
(4) It doesn’t matter how/whether …结构中的主语从句不可提前。例如：
It doesn’t matter whether he is wrong or not.
(5) 含主语从句的复合句是疑问句时，主语从句不可提前。例如：
Is it likely that it will rain in the evening?

4. What 与that 在引导主语从句时的区别
What 引导主语从句时在从句中充当句子成分，如主语．宾语．表语，而that 则不然。例如：
What you said yesterday is right.

宾语从句用以区分主语从句的几个特征：
1、引导词：whatwhichwhosewhenwhetherifwhere

2、语序：宾语从句必须是用陈述语句。
如：I think that you must work harder.
宾语从句的引导词、连接词的区别、否定转移等现象。
(1)表达时间的几个句型：一般用when或者是what time：
What time will the train leave?
由于时刻都是固定的，也可以用一般现在时代替一般将来时：
What time does the train leave?
(2)时间的表达方式：8：19(nineteen past eight),7:57(three to eight)，在时间的中间也可以加上分的单词(minutes)
(3)had better +动词原型。意思是提要求，建议。但是上下级不能用这种方式，因为语气太重：
You had better give up smoking .
(4)sb leave sth +地点
I left my book in my classroom yesterday.
(5)may I have your name(addressage)?一般询问对方的年龄、名字等，不要习惯以前的问法，这样很不礼貌，而是要采访上面的问法。
以前的习惯是：how old are you? what's your name?
(6)修饰名词的代词次序：限-描-大-形---年---颜----籍----物--------类+名词：
this is a bridge.
This is a beautiful bridge
补充：从句的语序永远是陈述句。
主语从句结构：
1、It is +名词+从句
It is a fact that… 事实是……
It is good news that … ……是好消息
It is a question that … ……是个问题
It is common knowledge that … ……是常识
类似的名词还有：a pity；a wonder；a good thing； no wonder； surprise等。
例如：It is a mystery to me how it all happened.
这一切是怎么发生的是个谜。
It is common knowledge that the whale is not a fish.
鲸鱼不是鱼，这是常识。
It is no surprise that Bob should have won the game.
鲍勃会赢得这场比赛，这不足为奇。

2、It is +形容词+从句
It is necessary that … 有必要……
It is clear that … 很清楚……
It is likely that … 很可能……
It is important that … 重要的是……
类似的形容词还有：
strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.
例如：It is obvious that conductors and insulators are both important in industry.
很明显导体和绝缘体在工业中都很重要。
It is doubtful whether she will be able to come.
她是否能来令人怀疑。
It was really astonishing that he refused to talk to you .
他拒绝和你说话真是令人惊讶。
It is essential that he should be here by the weekend .
周末之前，他应该到这里是必要的。
It seems obvious that we can not go on like this.
很明显我们不能这样下去了。

3、It is +过去分词+从句
It is said that … 据说……
It is reported that … 据报道……
It has been proved that … 已证明……
It must be proved that… 必须指出……
类似的过去分词还有：known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out,etc.
例如：It is thought that he is the best player.
大家都认为他是最好的选手。
It is estimated that the vase is 2000 years old.
据估计这个花瓶有2000年的历史。
It is used to be thought that a new star must be due to a collision between two stars.
过去一直认为新星是由于两颗星星之间碰撞产生的。
It has not been made clear when the new road is to be opened to traffic.
还没弄清楚这条路将开始通车。

4、It +不及物动词+从句
It seems that … 好像是……
It happened that… 碰巧……
It follows that … 由此可见……
It has turned out that … 结果是……
类似的不及物动词还有：seem, appear, occur, follow, happen, turn out, etc.
例如：It turned out that nobody remembered the address.
结果是无人记得那个地址。
It now appears that they are in urgent need of help.
看起来他们急需帮助。
It does not matter if I missed my train, because there is another later.
没有赶上这趟火车没有关系，稍晚还有一趟。
It happened that I saw him yesterday.
碰巧我昨天看见他了。
当“及物动词 + 宾语”较短时，也可用这种结构。
例如：It shocked me that Peter did not tell anybody where he was.
让我吃惊的是彼得没有告诉任何人他在哪里。
It does not interest me whether you go or not.
我对你去不去不感兴趣。
It +某些固定结构+ 主语从句。
例如：It doesn’t make too much difference （It doesn’t make any difference / It doesn’t alter the situation），whether it rains or not .
下不下雨都没有多大关系。
It does not make any difference whether it rains or not .
下不下雨没什么分别。
It does not make the least difference to me what you do.
对我来说你做什么都无关紧要。
Is it of much consequence to you that Mr. Wang has failed to do it ? 王先生没有做成这件事对你有什么重要影响吗？