动词短语：
由动词和动短语成，或以动词为中心，功能同动词的短语叫动词短语,动词短语是动词的一种固定搭配形式，动词短语的搭配可分为下列四种基本类型。
动词短语搭配形式：
1．动词+副词
①作及物动词，例： 
He brought up his children strictly． 　　
从以上的例句中可以看出，在“动词+副词”的词组中宾语位置有两种情况：
宾语如是名词，则可置于副词后面，亦可置于动词和副词之间。
而如果宾语是代词，只能置于动词后面，即动词和副词之间。 　　
②作不及物动词，例： 　　 
Something unexpected has turned up． 出现了令人意外的情况。（turn up=appear） 　　
③既可作及物动词又可作不及物动词，例： 　　
The barrel of gunpowder blew up．（不及物）火药桶爆炸了。 　　
The soldiers blew up the bridge．（及物）士兵们把桥炸毁了。

2．动词+介词 
动词与介词构成的词组在词义上相当于一个及物动词，宾语总是在介词后面，例：
I don’t much care for television．我不很喜欢电视。（care for=like）

3．动词+副词+介词
在这类动词短语中，动词、副词、介词紧密结合，是动副词组和动介词组的合成体，词义上相当于一个及物动词。
它兼有以上两类短语动词的特点，但宾语总是位于介词之后，例： 
We must work hard to make up for lost time．我们必须努力工作来弥补失去的时间。（make up for＝compensate）

4．动词+名词
这类动词短语中的常见动词是have，take，give，make等，
后面的名词通常是从动词转化而来的动作名词，并表达了短语动词的真正意义，例： 　　 
Let’s have another try．让我们再试一下。（have a try=v．try） 　

5．动词+名词+介词 　　 
这类动词短语只用作及物动词。名词前可加形容词说明程度，宾语总是位于介词之后，
 例：Keep an eye on the baby while I am out．我不在家时请照看一下小孩子。 　　

6．be+形容词（包括过去分词作形容词）+介词 　　 
这类动词短语也相当于及物动词，宾语位于介词后面，形容词是短语动词的真正词义，
例：I know he is slow at understanding，but you have to be patient with him. 我知道他理解力差，但你得对他耐心些。

动词短语与短语动词:
一、短语动词
(1)短语动词常常是两个词（一个动词+一个副词性小品）构成，如：wake up , get up ,turn out 等。

(2)同一个动词后面可以有不同的副词性小品词，构成不同意义的短语动词。如：He turn on the radio .Bob turned out smiling.

(3）短语动词用法普遍，尤其在非正式语言中：

我们可以说 He awoke late the following morning .但这太正式了。

我们通常说 He woke up late the following morning .

短语动词的类型

Here is a page from Mr Jones` diary :

Monday ,February 5th.

*有些短语动词不带宾语：

The car broke down .Cigarette prices are going up.

*多数主短语动词可以带宾语，宾语通常在副词性小品词的前或后：

动词+副词性小品词+宾语 动词+宾语+副词性小品词

I rang up a garage. I rang a garage up.

如果宾语较长，则通常放在副词之后：

I filled in an application form.(不说 I filled an application form in .)

如果宾语是代词，其结构通常如下：

动词+代词+副词性小品词

I put it down.(不说 I put down it .)

*有些短语动词是由三个词构成的（动词+副词性小品词+介词），这样，宾语就只能放在介词后面：

I don`t get on with the people at work.

短语动词由动词加上介词或副词小品词构成。比如：
1. 由动词break构成的常见短语动词有：
break away (from) 突然逃离；断绝往来，脱离；改掉，破除
break down （机器等）坏了；（计划等）失败；（谈话等）中断；（健康等）变坏；感情失去控制
break in 突然进来，强行进入；插嘴，打岔；训练，使适应
break into 强行进入；突然…起来；打断，插嘴；占用时间
break off 停止讲话；暂停，休息；（使）折断
break out （火灾、战争等）突然发生，爆发
break through 突破；克服，征服；强行穿过；（太阳等）从云层里出来
break up 解散，驱散；（学校等）放假；结束，破裂；击碎；绝交
break with 与…绝交，与…决裂
2. 又如由bring构成的常用短语动词有：
bring about 引起，实现，导致
bring (a)round 使改变观点或看法；使苏醒；顺便把某人带来串门
bring back 送还；使想起，使恢复
bring down 击落；打死，打伤；使倒下；降低
bring forth 产生，引起，结果
bring in 收获；获利；介绍，引进；聘请；逮捕
bring off 从船上救出；设法做成
bring on 带来，引起；促使生长；帮助提高
bring out 取出，拿出；显示出，使出来；出版
bring over 说服，使改变（思想等）
bring through 使度过（困难，危机等）
bring together 使和解
bring up 提出，提起；抚养，培养；呕吐

二、动词短语
动词短语由动词加上宾语或状语构成。如：
break a glass 打破一个玻璃杯
break one’s leg 摔断腿
break a window 打破窗户
break the rules 违反规定
break a bad habit 改掉坏习惯
break the world record 打破世界记录
bread easily 容易断
break to pieces 破成碎片
bring a book 带来一本书
bring sb sth 给某人带来某物
bring sb great satisfaction 给某人带来极大的快慰
bring death and famine 导致死亡和饥荒

初中英语动词短语整理：
1. break
break down破坏，出毛病，拆开
break off暂停，中断
break in破门而入， 打断
break into破门而入，突然…起来
break out爆发
break away from打破陈规；奋力挣脱；放弃习惯
break through 出现，突破
break up打碎，拆散， 分裂、分解

2. call
call at a place (车船等)停靠;到某地拜访。
call away 叫走，叫开…;转移(注意力等)。
call back唤回; 回电话;
call for需要，要求
call for sth (sb) 喊着叫某人来，喊着叫人取来某物
call in 叫进，请进; 找来，请来;来访；收回
call off取消; 叫走，转移开
call (up)on sb 拜访或看望某人
call sb sth 为某人叫某物
call (up)on sb to do sth
叫(请)某人做某事
call up给…打电话;  想起，回忆起; 召集，应召入伍   
call out大喊，高叫; 叫出去

3. come
come down下跌，落，降，传下来   
come in进来  
come out出版，结果是
come on来临/ 快点   
come along一道来，赶快
come over走过来   
come up发芽，走近     
come back回来   
come from来自，源自

4. cut
cut down砍倒，削减  
cut up连根拔除，切碎

5. die
die of死于（疾病，饥饿，寒冷，情感原因）
die from死于（外界原因）    
die out绝种

6. fall
fall behind落后 
fall down掉下，跌倒
fall into 落入；陷入
fall off 从。。。掉下
fall out与。。。争吵

7. go
go along沿着。。。。走
go through通过，经受
go over复习，检查                  
go up（价格）上涨，建造起来               
go against违反  
go away离开
go by时间过去                      
go down降低，（日、月）西沉
go on(with)继续进行                  
go out外出，熄灭                  
go off发出响声

8. get
get down下来，记下，使沮丧         
get on进展，进步，穿上，上车           
get off脱下,下车
get away逃跑，逃脱，去休假
get over克服，从疾病中恢复  
get along with进展，相处
get up起床                              
get into (trouble) 陷入困境中              
get back取回，收回                      
get out 出去
get to 到达。。。

9. give
give away赠送，泄露，出卖        
give out发出，疲劳，分发，      
give in (to sb.) 屈服
give up放弃，让（座位）

10. hand
hand in交上，提交
hand out分发    

11.hold
hold on to…继续，坚持
hold up举起，使停顿
hold on别挂电话，等，坚持     

12. keep       
keep up with跟上
keep out 不使。。。进入              
keep from克制，阻止
keep away from避开，不接近，
keep on继续，坚持下来
keep down 使。。。处于低水平                 

13.knock
knock at/on敲
knock into撞到某人身上                   

14. look
look up查找，向上看 
look through翻阅，浏览     
look after/ at / for 照顾/看/寻找
look out(for)当心                                  
look about / around/round四下查看
look forward to盼望                           

15. make
make up编造，打扮，组成           
make into / of / from 制成           

16.pass     
pass by经过              
pass down(on)…to传给

17. pay
pay back还钱，报复 
pay for付钱，因…得到报应  

18. pick
pick up拾起，接人，站起，收听，
pick out挑选，辨认，看出  

19. put
put up张贴，举起，   
put out伸出，扑灭            
put off推迟               
put into放进，翻译
put away放好，存钱           
put down记下，平息
put on穿戴，上映，              
put aside放到一边         
put back放回

20. stand
stand out 突显，引人注目
stand up 起立，站起来
38.其它常用词组
wake up 醒，唤醒，弄醒
stay up 不睡觉；熬夜
depend on依靠；取决于
worry about为。。。担忧
laugh at嘲笑。。。
begin with以。。。开始
mix up混合、搀和
major in 主修
grow up成长
open up 打开，张开；开发
end up到达或来到某处； 达到某状态
throw away 丢弃。。。
ask for要求。。。
wait for等待。。。
agree with同意。。。
find out（经研究或询问）获知某事
send out 发出，放出，射出
search for 搜索，搜查
chop down 砍到
have.. on 穿着。。。
step out of 跨步走出
drop out of 从。。。掉出
happen to 发生在。。。
belong to属于
arrive in /at到达。。。
try on试穿。。。
vote on对。。。进行投票
strech out伸展。。。
hang out闲逛
leave for离开前往
sell out 卖完、售完
show up 出席；露面

21. run
run after追逐，追捕   
run away逃跑  
run off跑掉，迅速离开       
run out of用完

22. set
set up建立       
set off 激起，引起      

23. take
take after 与…相像
take off脱掉，起飞  
take away拿走  
take up从事，占用（时间空间）   
take down记录，取下       
take back收回
take pride in以… ……为自豪,
take the place of 代替

24. think
think of想起，考虑，对…看法   
think out（自然）想出办法  
think up想出（设计出、发明、编造）
think about考虑      
think over仔细考虑      

25. turn
turn off / on打开                  
turn to翻到，转向，求助
turn down调低，拒绝               
turn back返回，转回去
turn round转过身来                 
turn up向上翻，出现，音量调大                     

26. care
care about 担心，关心；在乎，介意
care for 关心，关怀，照顾

27. clean
clean up 把…打扫干净，把…收拾整齐
clean out 清除；把…打扫干净

28.learn
learn about 获悉，得知，认识到
learn from  从/向。。。学习

29. fight
fight for..争取获得…
fight against 争取克服、战胜…
fight with…与。。。搏斗/战斗

30. dream
dream of梦想，想橡
dream about 梦到。。。

31. work
work for 为。。工作
work out 产生结果；发展；成功

32. argue
argue with …与。。。争论
argue about..争论。。。

33. complain
complain to 向。。抱怨
complain about抱怨。。。

34. hear
hear of 听说，得知
hear about听到。。。的事，听到。。的话
hear from接到。。。的信

35. talk
talk about 讨论。。。
talk with/to..和。。。讨论

36. live
live in 住在。。。
live on 以。。。为主食

宾语从句：
在句子中起宾语作用的从句叫做宾语从句。
宾语从句分为三类：动词的宾语从句，介词的宾语从句和形容词的宾语从句。
宾语从句连接代词主要有：
who, whom ,whose ,what ,whoever ,whomever ,whosever, whatever, whichever 等。

宾语从句的特点:
1.宾语从句可以作及物动词、介词及形容词的宾语。
2.宾语从句的语序一律用陈述句语序。
3.连接词that引导宾语从句在句中无词义，不充当句子成份，多数情况下可以省略。
4.whether 和 if 都可引导宾语从句，但 whether后可紧跟or not；whether从句可作介词的宾语。
5.如果从句太长，可以用形式宾语it.

宾语从句的时态:
1.主句是一般现在时，从句根据实际情况使用任何时态。
例句：The headmaster hopes everything goes well.
2.主句是过去时态，从句须用过去时态的某种形式。
例句：She was sorry that she hadn’t finished her work on time.
3.当宾语从句表示的是一个客观真理或者事实时，即使主句是过去时，从句也用一般现在时态。
例句：The teacher told his class that light travels faster than sound.
4. 如果从句的动作发生在主句之前，则从句要用过去完成时态。 

宾语从句的语序:
A. 宾语从句必须用陈述语序。 　　
False: He is wondering when can he finish this difficult job. 　　
Right: He is wondering when he can finish this difficult job.
B. 有时候可以用it 作形式宾语，而把真正的宾语从句放在后面。 　　　
Bad: I thought that he could finish this　job in just two hours impossible. 　　
Good: I thought it impossible that he could finish this job in just two hours.　 
C. 带有宾语从句的复合句的否定形式一般是否定主句。
Bad: I think he doesn’t like the English teacher. 　　
Good: I don’t think he likes the English teacher. 
D.  主句一般过去时态，从句也要用过去时态。
False: He wanted to know why he is crying in the corner. 　　
Right: He wanted to know why he was crying in the corner

宾语从句的否定转移:
主句的谓语动词是think,believe,imagine,suppose,consider,espect,fancy,guess等。
并且主句的主语是第一人称而且为一般现在时，从句的否定词一般要转移到主句上来,其反义疑问句一般与宾语从句一致。
I don’t think he will come to my party.而不能说成I think he won’t come to my party.
我认为他不会来我的舞会.
I don’t believe that man is killed by Jim,is he?
我认为那个人不是Jim所杀的,是不是?
如果宾语从句中有某个含有否定意义的形容词或副词,其反义疑问句要用肯定形式。
We find that he never listens to the teacher carefully,does he?
我们发现他从来不仔细听老师讲课，是不是?

宾语从句中引导词的用法比较
在复合句中作主句的宾语，引导词有：
连词：that (that 常可省略),whether, if
代词：who, whose, what ,which
副词：when ,where, how, why 等。

（一）that引导的宾语从句（在非正式场合that可以省略）
1.可跟that从句做宾语的动词有：
say, think, insist, wish, hope, demand, imagine, wonder, know, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, mean, notice, prefer, request, require, propose, declare, report等。
例句：The boy believes that he will travel through space to other planets.
注意事项：当主句谓语动词是 think, believe, suppose, expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。
例句：I don’t think it is right for him to treat you like that.

2.在以下情况中that不能省略
a.当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。
例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.
b.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。
例句：Just then I noticed, for the first time, that our master was wearing his fine green coat and his black silk cap.
c.当that从句是双宾语中的直接宾语时，that不可省。
例句：I can’t tell him that his mother died.
d.注:许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语。
例句：I find it necessary that we should do the homework on time.

（二）由whether,if 引导的宾语从句
1.由whether(if)引导的宾语从句，实际上是一般疑问句演变而来的。意思是“是否”。宾语从句要用陈述句语序。
一般说来，在宾语从句中whether与if可以互换使用，但在特殊情况下if与whether是不能互换的。
例句：I wonder whether(if) they will come to our party.

2.只能用whether，不能用if引导的宾语从句
a.在带to的不定式前
例句：We decided whether to walk there.
b.在介词的后面
例句：I’m thinking of whether we should go to see the film.
c.在动词后面的宾语从句时
例句：We discussed whether we had a sports meeting next week
d.直接与or not连用时
例句：I can’t say whether or not thet can come on time.

3.只能用if不能用whether引导的宾语从句
a.if引导条件状语从句，意为“如果”
例句：The students will go on a picnic if it is sunny.
b.if引导否定概念的宾语从句时
例句：He asked if I didn’t come to school yesterday.
c.引导状语从句even if（即使）和as if（好象）时
例句：He talks as if he has known all about it.

if,whether在宾语从句中的区别
a.if和whether在作“是否”解时,引导宾语从句常放在动词know,ask,care,wonder,find out等之后,介词后一般不用if
b.少数动词,如:leave,put,discuss,doubt后的宾语从句常用whether. 
c. whether后可以加or not,但是if不可以.
d.在不定式前只能用whether.
（如：I can’t decide whether to stay. 我不能决定是否留下。）
e.避免歧异时,我们常用whether而不用if.

（三）连接代词和连接副词引导的宾语从句
这样的宾语从句实际上是由特殊疑问句变化而来的，宾语从句要用陈述句语序。
用于这种结构的动词常常是：see, say, tell, ask, answer, know, decide, show, find out, imagine, suggest, doubt, wonder, discover, understand, inform, advise等。
1.英语中的连接代词有：who,whom,whose,which,what,在句中担任主语、宾语、定语或者表语。
例句：Can you tell me whom you are waiting for?
2.英语中的连接副词有：when,where,why,how，在句中担任状语的成分。
例句：None of us knows where these new parts can be bought.

简化宾语从句常用六法：
方法一：
当主句谓语动词是hope， decide， wish， choose， agree， promise等，
且宾语从句的主语与主句主语一致时，宾语从句可简化为不定式结构。
例如：
Li Ming hopes he will be back very soon.
→Li Ming hopes to be back very soon.
We decided that we would help him.
→We decided to help him.

方法二：当主句谓语动词是know， learn， remember， forget， tell等动词，
且主句主语与从句主语一致时，宾语从句可简化为“疑问词+不定式”结构。例如：
She has forgotten how she can open the window.
→She has forgotten how to open the window.
注：当主句谓语动词是tell， ask， show， teach等动词，
且后带双宾语，从句主语和间接宾语一致时，宾语从句可简化为“疑问词+不定式”结构。例如：
Could you tell me how I can get to the station？
→Could you tell me how to get to the station？

方法三：当主句的谓语动词是order（命令），require（需要）等时，
如果主句和从句的主语不一致，宾语从句可简化为“名词（代词）+不定式”结构。例如：
The headmaster ordered that we should start at once.
→ The headmaster ordered us to start at once.

方法四：某些动词后的宾语从句，可以用介词加动名词（短语）等其他形式简化。例如：
He insisted that he should go with us.
→He insisted on going with us.
The poor boy doesn’t know when and where he was born.
→The poor boy doesn’t know the time and the place of his birth.

方法五：某些动词后面的宾语从句可转化为“宾语+V-ing形式（作宾语补足语）”结构。例如：
Liu Ping found that there was a wallet lying on the ground.
→ Liu Ping found a wallet lying on the ground.

方法六：动词seem后的宾语从句，也可以用不定式（短语）来简化，但句型需要进行适当的变化。例如：
It seemed that the boys were going to win.
→The boys seemed to win.
除上述方法外，还有一些特殊句式的转化。例如：
I found that it was difficult to learn English well.
→I found it difficult to learn English well.
Soon we found that the ground was covered with thick snow.
→Soon we found the ground covered with thick snow.
They found that the box was very heavy.
→They found the box very heavy

“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?

固定搭配：
英语中的固定搭配主要是指英语中的习惯用法，如有固定用法的一些动词短语、介词短语、名词词组及形容词词组。
例如：
take part in (参加) 
by accident (偶然地) 
lucky dog (幸运儿)
be interested in (对…感兴趣)

初中英语常见固定搭配：
(一)加-ing
enjoy / like doing sth 喜欢做----    
spend....(in) doing sth 在做---花费---  
try doing 试着做------                
be busy doing sth 忙于做------
finish doing sth 完成做----           
look forward to + doing sth 期待做----(现在进行时)
be doing 正在做---     
Thank you for (doing) sth 为了--感谢你

（二）加-to
decide to do sth 决定去做-----             
ask (sb)to do 要求(某人)去做----      
It’s+adj +to do sth . 做---(怎么样)        
would like / want to do 想要做-----    
It takes sb sometime to do sth在做----花费----

（三）加原形
let / make sb do sth 让某人做某事   
be going to / will do sth （一般将来时态）

（四）加-to 或-ing意思不同
forget doing 忘记做过了-----(已做)    
forget to do 忘记去做------(还没做)   
remember doing记得做过了-----(已做)
remember to do记得去做------(还没做)

（五）加-to 或-ing意思相同
begin / start to do sth = begin / start doing sth开始做------

（六）
A）动词+ 介词
agree with同意....的意见(想法)；符合    
help ... with ...帮助(某人)做(某事)  listen to听...              
..get to到达....       
fall off (从......)掉下base on以....(为)根据     
knock at /on敲(门、窗)        
laugh at嘲笑
learn.. from 向...学习     
live on继续存在；靠...生活 
look after照顾，照看look at看；观看           
look for寻找             
look like看起来像
pay for (sth.)付钱；支付 
point at指示；指向          
point to指向....prefer to ...宁愿(选择);更喜欢           
quarrel with (和某人)吵架
regard...as ...把....当作....；当作                 
stop...from阻止.....做.....
talk about说话；谈话；谈论                        
talk with与......交谈think about考虑                                  
think of认为；想起
B)动词+ 副词                                                     
ask for请求；询问       
carry on坚持下去；继续下去     
cut down砍倒 
clean up清除；收拾干净  
come down下来；落    
come along来；随同
come in进来            
come on来吧；跟着来；赶快 
come over过来；顺便来访           
come out出来；出现；(花)开；发(芽)      
drop off放下(某物)；下车                              
eat up吃光；吃完
fall behind落在......后面；输给别人            
fall down跌倒；从......落下
find out查出(真相)                                
get back回来；取回
get down下来；落下；把......取下来             
get off下来；从......下来get on上(车)               
get up起床                
give up放弃go on继续               
go out出去     
go over过一遍；仔细检查
grow up长大；成长      
hand in交上来                
hurry up赶快
hold on (口语)等一等；(打电话时)不挂断             
look out留神；注意
look over (仔细)检查                            
look up向上看；抬头看  
pass on传递；转移到....                          
pick up拾起；捡起
put away放好；把....收起来  
put on穿上；戴上；(戏剧等)上演；放(唱片等
put down把(某物)放下来                             
put up挂起；举起
run away流失；逃跑；逃走 
rush out冲出去 
set off出发；动身；
启程send up发射；把......往上送  
shut down把......关上      
sit down坐下
slow down减缓；减速      
take off脱掉(衣服)          
take out取出
throw about乱丢；抛撒                          
trip over (被......)绊倒
try on试穿(衣服、鞋等)；试戴(帽子等)                
try out试验；尝试
turn down关小；调低        
turn on打开(电灯、收音机、煤气、自来水等
turn off关(电灯、收音机、煤气、自来水等)           
turn over (使)翻过来
wake up醒来                               
wear out把......穿旧；磨坏
work out算出；制订出                               
write down写下....
C) be + 形容词+ 介词                                              
be angry with对(某人)发脾气              
 be interested in对......感兴趣 
be able to能；会                                   
 be afraid of害怕
be amazed at对......感到惊讶            
be excited about对......感到兴奋
be filled with用......充满                            
be full of充满......的
be good at =do well in在....方面做得好；善于             
be late for迟到
be made in在......生产或制造            
be made of由....组成；由....
be pleased with对......感到满意              
be proud of以......自豪/高兴
be used for用于
D)动词+ 名词/ 代词                                               
beg one′s pardon请原谅；对不起         
do morning exercises做早操
do one′s homework做作业                                           
enjoy oneself =have a good time过得快乐；玩得愉快                   
give a concert开音乐会     
go boating去划船      
go fishing去钓鱼go hiking去徒步旅行     
go skating去滑冰     
go shopping (去)买东西
have a cold (患)感冒    
have a cough (患)咳嗽  
have a headache (患)头痛  
have a try尝试；努力    
have a look看一看         
have a rest休息 
have a seat (= take a seat ) 就坐；坐下        
have sports进行体育活动  
have supper吃晚餐   
hear of听说   
hold a sports meeting举行运动会
make a decision作出决定  
make a mistake犯错误  
make a noise吵闹
make faces做鬼脸      
make friends交朋友       
make money赚钱
take one′s place坐某人的座位；代替某人的职务                       
teach oneself (=learn by oneself ) 自学                  
watch TV看电视 
take photos照相       
take time花费(时间)         
take turns轮流
E)动词+ 名词/ 代词/ 副词+ 介词                                  
catch up with赶上           
come up with找到；提出(答案、解决办法等)
get on well with与......相处融洽                   
give birth to生(孩子) 
help yourself / yourselves to自取；随便吃   
make room for给.....腾出地方
play a joke on戏弄人；对人恶作剧              
speak highly of称赞   
say good bye to告别；告辞               
take an active part in积极参加
take care of照顾；照料；注意
F)其他类型                                                        
be awake醒着的          
be born出生         
be busy doing忙着做
come true实现     
do one′s best尽最大努力     
fall asleep睡觉；入睡  
go home回家    
go on doing (sth.)继续做某事；尽力   
get married结婚
get together相聚                  
go straight along  沿着...一直往前走
had better (do)最好(做...)                    
keep doing sth.一直做某事        
make sure确保；确认；查明               
make up one′s mind下决心