本试题 “句型转换。1. He was very tired,but he worked late into the night._______ ________ ________ ________,he worked late into the night.2.If I were you,I...” 主要考查您对状语从句
全部倒装
部分倒装
虚拟语气
等考点的理解。关于这些考点您可以点击下面的选项卡查看详细档案。
状语从句的概念：
状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。
比较while/as/when：
1、as/when引导短暂性动作的动词例句：
如：Just as/Just when/When I stopped my car, a man came up to me.
2、当从句的动作发生于主句动作之前，只能用when引导这个从句，不可用as或while。
如：When you have finished your work, you may have a rest.
3、从句表示“随时间推移”连词能用as，不用when或while。
如：As the day went on, the weather got worse.
比较untill/till：
两个连词意义相同,肯定形式表示的意思是“做某事直至某时”，动词必须是延续性的。否定形式表达的意思是“直至某时才做某事”，动词为延续性或非延续性都可以。
正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。
肯定句例句：I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
注意：在肯定句中可用before代替：Let's get in the wheat before the sunsets.
否定句例句：She didn't arrive until 6o'clock.
I didn't manage to do it until you had explained how.
1、Until可用于句首，而till通常不用于句首。
例句：Until you told me, I had heard nothing of what happened.
2、Untilwhen疑问句中，until要放在句首。
例句：Until when are you staying? 你呆到什么时候？
注意：否定句可用另外两种句式表示。
1）Not until…在句首，主句用倒装。
例句：Not until the early years of the19th century did man know what heat is.
2）It is not until…that…
状语从句的用种类：
1、时间状语从句：
表示时间的状语从句可由when, as, while, whenever, after, before, till(until), since, once, as soon as(或the moment), by the time, no sooner…than, hardly(scarcely)… when, everytime等引导。
e.g. When I came into the office, the teachers were having a meeting.
He started as soon as he received the news.
Once you see him, you will never forget him.
No sooner had I gone to bed than I went to sleep.
2、原因状语从句：
原因状语从句是表示原因或理由的，引导这类从句的最常用的连词是because, since, as, nowthat（既然）等，for表示因果关系时（它引导的不是从句）为并列连词，语气不如because强。 e.g. He is disappointed because he didn't get the position.
As it is raining, I will not go out.
Now that you mention it, I do remember.
3、地点状语从句：
引导地点状语从句的连词是where和wherever等。
e.g. Sit wherever you like.
Make a mark where you have a question.
4、目的状语从句：
引导目的状语从句最常用的词（组）是so, so that（从句谓语常有情态动词）, in order that, in case（以防，以免）等。
e.g. Speak clearly, so that they may understand you.
She has bought the book in order that she could follow the TV lessons.
He left early in case he should miss the train.
5、结果状语从句：
结果状语从句是表示事态结果的从句，通常主句是原因，从句是结果。由so that（从句谓语一般没有情态动词）,so…that, such…that等引导。
e.g. She was ill, so that she didn't attend the meeting.
He was so excited that he could not say a word.
She is such a good teacher that everyone admires her.
6、条件状语从句：
条件状语从句分真实性（有可能实现的事情）与非真实性（条件与事实相反或者在说话者看来不大可能实现的事情）条件句。
引导条件状语从句的词（组）主要有if, unless, so(as)long as, on condition that, so(as) far as, if only(=if)。
注意：条件从句中的if不能用whether替换。
e.g. If he is not in the office, he must be out for lunch.
You may borrow the book so long as you keep it clean.
So far as I know（据我所知）, he will be away for three months.
You can go swimming on condition that(=if) you don't go too far away from the river bank.
If he had come a few minutes earlier, he could have seen her.
7、让步状语从句：
让步状语从句可由although, though, as, even if(though), however, whatever, whether…or, no matter who(when, what,…)等引导。
注意：as引导的让步状语从句一般是倒装的。
e.g. Though he is a child, he knows a lot.
Child a she is, he knows a lot.
Whatever(=No matter what) you say, I'll never change my mind.
8、方式状语从句：
方式状语从句常由as, as if(though), the way, rather than等引导。
e.g.You must do the exercise as I show you.
He acted as if nothing had happened.
9、比较状语从句：
比较状语从句常用than, so(as)…as, the more…the more等引导。
e.g. I have made a lot more mistakes than you have.
He smokes cigarettes as expensive as he can afford.
The busier he is, the happier he feels.
使用状语从句时要注意的几个问题：
1、在时间和条件（有时也在方式、让步等）从句中，主句是一般将来时，从句通常用一般现在时表示将来。
e.g. We'll go outing if it doesn't rain tomorrow.
I'll write to you as soon as I get to Shanghai.
2、有些时间、地点、条件、方式或让步从句，如果从句的主语与主句主语一致（或虽不一致，是it），从句的谓语又包含动词be，就可省略从句中的“主语+be”部分。
e.g. When(hewas) still a boy of ten, he had to work day and night.
If(you are) asked you may come in.
If(it is) necessary I'll explain to you again.
3、注意区分不同从句：引导的是什么从句，不仅要根据连词，还要根据句子结构和句意来判别。以where为例，能引导多种从句。
e.g. You are to find it where you left it.（地点状语从句）
Tell me the address where he lives.（定语从句，句中有先行词）
I don't know where he came from.（宾语从句）
Where he has gone is not known yet.（主语从句）
This place is where they once hid.（表语从句）
注意：表示“一…就…”的结构 hardly/scarcely…when/before/no sooner…than和as soon as都可以表示“一…就…”的意思。
例句：I had hardly/scarcely got home when it began to rain.
I had no sooner got home than it began to rain.
As soon as I got home, it began to rain.
注意：如果hardly/scarcely或nosooner置于句首，句子必须用倒装结构：
例句：Hardly/Scarcely had I got home when it began to rain.
No sooner had I got home than it began to rain.
全部倒装的概念：
倒装英语句子的主语通常位于谓语动词之前，这种语序被称为正常语序。但有时出于修辞或某种特殊的语法结构的需要，需要将谓语动词放在主语之前，这种语序则叫倒装语序。主语和谓语完全倒置叫完全倒装。
完全倒装完全倒装的基本形式是“谓语+主语”，主要见于以下情况：
1、here和there位于句首时的倒装：
表示地点的here和there位于句首时，其后用完全倒装形式。这类倒装句的谓语通常是动词be和come,go等表示移动或动态的不及物动词：
如：Here's Tom. 汤姆在这里。
There's Jim. 吉姆在那儿。
Here comes the bus. 公共汽车来了。
There goes the bell. 铃响了。
There goes the last train. 最后一班火车开走了。
注：（1）以上倒装句中的谓语动词come和go不能用进行时态，即不能说：Here is coming the bus.
（2）若主语为代词，则不倒装：
如：Here I am. 我在这儿。/ 我来了。
Here it comes.它来了。
（3）其中的动词有时也可能是stand, lie, live等表示状态的动词（表示存在）：
如：There stood a desk against the wall. 靠墙放着一张书桌。
Once upon a time there lived a man known by the name of Beef. 从前有个人名叫比夫。
2、away和down等位于句首时的倒装：
地点副词away, down, in, off, out, over, round, up等位于句首时，其后用完全倒装语序。这类倒装句的谓语通常表示动态的不及物动词：
如：Away went the runners. 赛跑选手们跑远了。
Round and round flew the plane. 飞机盘旋着。
The door opened and in came Mr Smith. 门开了，史密斯先生进了来。
Down came the rain and up went the umbrellas. 下雨了，伞都撑起来了。
注：若主语为人称代词，则不能用倒装：
如：Away he went. 他跑远了。
Down it came. 它掉了下来。
3、某些状语或表语位于句首时的倒装：
为了保持句子平衡或使上下文衔接紧密，有时可将状语或表语置于句首，句中主语和谓语完全倒装：
如：Among these people was his friend Jim. 他的朋友吉姆就在这些人当中。
By the window sat a young man with a magazine in his hand. 窗户边坐着一个年轻人，手里拿着一本杂志。
注：在表语置于句首的这类倒装结构中，要注意其中的谓语应与其后的主语保持一致，而不是与位于句首的表语保持一致。
比较：In the box was a cat. 箱子里是一只猫。
In the box were some cats. 箱子里是一些猫。
4、现在分词、过去分词或不定式置于句首的倒装：
有时为了强调，可将谓语部分的现在分词、过去分词或不定式置于句首，从而构成倒装：
如：Buried in the sands was an ancient village. 一个古老的村庄被埋在这沙土之中。
Standing beside the table was his wife. 站在桌旁的是他的妻子。
To be carefully considered are the following questions. 下列问题要仔细考虑。
部分倒装的概念：
倒装英语句子的主语通常位于谓语动词之前，这种语序被称为正常语序。但有时出于修辞或某种特殊的语法结构的需要，需要将谓语动词放在主语之前，这种语序则叫倒装语序。主语和助动词倒置叫部分倒装。
虚拟语气的概念：
虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。在条件句中的应用条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。
虚拟语气在条件句中的应用：
一、真实条件句：
真实条件句真实条件句用于陈述语气，假设的情况可能发生，其中if是如果的意思。
时态关系句型：条件从句：一般现在时；主句：shall/will+动词原形
如：If he comes, he will bring his violin.
典型例题：
The volleyball match will be put off if it___.
A. will rain
B. rains
C. rained
D. is rained
答案：B。真实条件句主句为将来时，从句用一般现在时。
注意：1）在真实条件句中，主句不能用be going to表示将来，该用shall, will。
如： （错） If you leave now, you are never going to regret it.
（对） If you leave now, you will never regret it.
2）表示真理时，主句谓语动词便不用shall(will)+动词原形，而直接用一般现在时的动词形式。
二、非真实条件句：
非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。
1）时态：可以表示过去，现在和将来的情况。它的基本特点是时态退后。
a. 同现在事实相反的假设。
句型：从句：一般过去时；主句：should(would)+动词原形
如：If they were here, they would help you.
b.表示于过去事实相反的假设。
句型：条件从句：过去完成时；主句：should(would)have+过去分词
如：If she had worked harder, she would have succeeded.
The rice would not have been burnt if you had been more careful.
If my lawyer had been here last Saturday, he would have prevented me from going.
c.表示对将来的假想句型：
条件从句：一般过去时；主句：should+动词原形
从句： were+不定式；主句：would+动词原形 should+动词原形
如：If you succeeded, everything would be all right.
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
三、混合条件句：
主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。
如：If you had asked him yesterday, you would know what to do now. （从句与过去事实相反，主句与现在事实相反。）
If it had rained last night (过去), it would be very cold today (现在).
比较if only与only if：
only if表示“只有”；if only则表示“如果……就好了”。If only也可用于陈述语气。
如：I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。
If only the alarm clock had rung. 当时闹钟响了，就好了。
If only he comes early. 但愿他早点回来。
It is(high) time that It is(high) time that 后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。
如：It is time that the children went to bed.
It is high time that the children should go to bed.
need“不必做”和“本不该做"”
didn't need to do表示：过去不必做某事，事实上也没做。
needn'thavedone表示：过去不必做某事，但事实上做了。
如：John went to the station with the car to meet Mary, so she didn't need to walk back home.
约翰开车去车站接玛丽，所以她不必步行回家了。
John went to the station with the car to meet Mary, so she needn't have walked back home.
约翰开车去车站接玛丽，所以她本不必步行回家了。(Mary步行回家，没有遇上John的车。)
典型例题：
There was plenty o ftime. She___.
A. mustn't have hurried
B. couldn't have hurried
C. must not hurry
D. needn't have hurried
答案：D。needn't havedone. 意为"本不必"，即已经做了某事，而时实际上不必要。 Mustn't have done用法不正确，对过去发生的事情进行否定性推断应为couldn't have done,“不可能已经”。must not do不可以（用于一般现在时）
特殊的虚拟语气词should 的用法：
1）It is demanded/necessary/a pity+that…结构中的主语从句的谓语动词要用should加动词原形，should可省略。
句型：
如：It is suggested that we(should) hold a meeting next week.
It is necessary that he(should) come to our meeting tomorrow.
2）在宾语从句中的应用在表示命令、建议、要求等一类动词后面的从句中。order, suggest, propose, require, demand, request, insist, command, insist+(should)do
如：I suggest that we(should) hold a meeting next week.
He insisted that he(should) be sent there.
注意：如suggest, insist不表示“建议”或“坚持要某人做某事时”，即它们用于其本意“暗示、表明”、“坚持认为”时，宾语从句用陈述语气。
如：The guard at gate insisted that everybody obey the rules.
判断改错：（错）You pale face suggests that you(should) be ill.
（对）Your pale face suggests that you are ill.
（错）I insisted that you(should) be wrong.
（对）I insisted that you were wrong.
3）在表语从句，同位语从句中的应用在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。
如：My idea is that we(should) get more people to attend the conference.
I make a proposal that we(should) hold a meeting next week.
虚拟语气知识体系：
| 条件从句中的谓语动词形式 | 主句中的谓语动词形式 | |
| 与过去事实相反 | had+过去分词 | should/would+have+过去分词 |
| 与现在事实相反 | 过去式 | should/would+动词原形 |
| 与将来事实相反 | 1、过去式 | should/would+动词原形 |
| 2、should+动词原形 | should/would+动词原形 | |
| 3、were to+动词原形 | should/would+动词原形 |
虚拟条件句的倒装：
虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should或had移到从句句首，实行倒装。
如：Were they here now, they could help us.=If they were here now, they could help us.
Had you come earlier, you would have met him=If you had come earlier, you would have met him.
Should it rain, the crops would be saved.=Were it to rain, the crops would be saved.
注意：在虚拟语气的从句中，动词“be”的过去时态一律用“were”，不用was，即在从句中be用were代替。
如：If I were you, I would go to look for him. 如果我是你，就会去找他。
If he were here, everything would be all right. 如果他在这儿，一切都会好的。
典型例题：_____to do the work, I should do it some other day.
A. If were I
B. I were
C. Were I
D. Was I
答案：C. 在虚拟条件状语中如果有were, should, had这三个词，通常将if省略，主语提前，变成were, should, had+主语的形式。
但要注意，在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说Were I not to do.，而不能说Weren't I to do。
与“句型转换。1. He was very tired,but he worked late into th...”考查相似的试题有：