如果没有必要，你最好不要查字典。
②在虚拟条件句中连词if的省略。在虚拟条件句中，如果从句谓语中含有had/were/should, if可省略，把had/were/should提至句首引起倒装。
Were_I_(＝If_I_were) twenty now, I would join the army. 如果我现在二十岁，我就参军。
Had_you_come_(＝If_you_had_come) yesterday, you would have met him. 如果你昨天来，你就见到他了。
Should_there_be_(＝If_there_should_be) a flood, what should we do? 万一发生洪水，我们怎么办？
2 so that引导目的状语从句和结果状语从句的区别
so that既可引导目的状语从句也可引导结果状语从句。那么，在实际使用过程中如何区别它们呢？下面就语义关系和结构形式对这两种从句进行辨析说明。
(1)so that引导的从句若反映一种意欲、一种可能性，则是目的状语从句；若表示一种事实，就是结果状语从句。试比较：
I'd like to take a taxi so_that I'll get there in time. 我想打的，以便及时到那里。(及时到那里是目的)
I took a taxi, so_that I got there in time.我打了的，所以及时到了那里。(及时到那里是结果)
(2)目的状语从句表示想要达到某种目的的意愿，即一种可能性，并非事实，因而从句中多用can, may, will, could, might, would, should等情态动词；而结果状语从句表示客观事实，所以从句中常无情态动词。试比较：
The girl bought a new skirt so_that she could wear it at her birthday party. 那个女孩买了一条新裙子，以便能在生日宴会上穿。(目的状语从句)
The girl bought a new skirt, so_that she looked more beautiful at her birthday party.
那个女孩买了一条新裙子，结果在生日宴会上她看起来更漂亮了。(结果状语从句) (3)目的状语从句与主句的关系紧密，在讲话时一气呵成，而结果状语从句则是句子的外在因素，讲话时往往在主句和从句之间略加停顿，书写时一般用逗号隔开。试比较：
We'll come at eight so_that the meeting can begin early. 我们要八点来，以便会议能早点开始。(目的状语从句)
We all arrived at eight, so_that the meeting began promptly. 我们都是八点到达的，结果会议马上就开始了。(结果状语从句)
[考法综述] 状语从句的考查重点在从属连词上，尤其在语篇型语法填空和短文
改错中常会涉及，近五年就考查了72次之多，由此可见其重要性。
命题法 考查状语从句的引导词
典例1 The young couple, who returned my lost wallet, left ________ I could ask for their names.
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[答案] before 句意：那对年轻夫妻把我丢失的钱包还给了我，我还没来得及询问他们的名字，他们就离开了。before意为“在……之前；还没来得及……”。根据句意可知填before。
典例2 You will never gain success if you are fully devoted to your work. ________________________________________________________
[答案] if→unless 根据句意，此处表示“除非，如果不”，故用unless。
【解题法】 状语从句中从属连词的必备知识和一般解题思路
(1)首先，具备全面的状语从句知识，熟悉掌握每个从属连词的语义和语法特征。 (2)在语法填空中，考查状语从句是不给提示词的，因此正确理解语境是正确答题的关键。特别牢记时间状语从句中的几个固定句型。
(3)在短文改错中，重点考查从属连词的错用上，因此考生要注意区分某些近义，近似从属连词及句式的用法。
A．单句填空
1．We need to get to the root of the problem ________ we can solve it. 答案 before [句意：在能够解决这个问题之前，我们需要找到它的根源所在。根据句意可知用before。]
2．Just ________ a single word can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
答案 as [句意：正如一个词可以改变一个句子的意思一样，一个句子可以改变一个段落的意思。根据句意可知用as。]
3．________ scientists have learned a lot about the universe, there is much we still don't know.
答案 Although/Though/While [句意：虽然科学家已经了解了很多有关宇宙的东西，但是还有很多我们不知道的。根据句意可知填Although/Though/While。]
4．________ he once felt like giving up, he now has the determination to push further and keep on going.
答案 Where [句意：在他曾经想要放弃的地方，他现在有决心进一步推进并且坚持下去了。根据句意可知用Where。]
5．________ the students came from different countries, they got along quite well in the summer camp.
答案 Although/Though/While [句意：虽然这些学生来自不同的国家，但他们在这个夏令营中相处得很好。根据句意可知用Although/Though/While。]
6．In fact, ________ Tiffany Two celebrated her 27th birthday back in March, she had lived the equivalent (等量) of 125 human years.
答案 when [句意：事实上，当Tiffany Two 在三月份庆祝她27岁生日时，她已经活了相当于人类的125年了。故填连词when引导时间状语从句。]
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7．Linda was quite sure that she was going to miss her train ________ she was not very far from the station.
答案 though/although [句意：虽然琳达离火车站不是非常远，但是她非常肯定她会错过她的火车。though/although意为“虽然”。]
8．On our last hike, we were told to take a rest ________ we felt tired. 答案 when [句意：在上次远足中，我们被告知感到累了就歇一歇。when意为“当……时”。]
9．Any measure of an ad's performance is entirely pointless ________ it could be viewed by a person.
答案 unless [句意：如果没人看，广告的任何表现形式都是完全没有意义的。考查条件状语从句。根据句意填unless。]
10．It took what seemed to be years ________ the actress finally turned up, which made the journalists as well as audiences disappointed and angry.
答案 before [句意：似乎用了好几年的时间这位女演员才最终出现，这使得记者和观众既失望 又气愤。考查时间状语从句。根据句型it takes/took some time before...，可知填before。]
B．单句改错
1．Unless the damage is done, it will take many years for the farmland to recover. ________________________________________________________
答案 Unless→If/Once [根据句意可知此处表示“如果；一旦”，故用If/Once。] 2．It is so cold that you can 't go outside if fully covered in thick clothes. ________________________________________________________ 答案 if→unless [根据句意可知此处表示“除非”，故用unless。]
3．There is only one more day to go after your favorite music group play live. ________________________________________________________ 答案 after→before [根据语意可知是之前，故用before。]
4．If you miss this chance, it may be years since you get another one. ________________________________________________________
答案 since→before [此处为固定结构It may be＋段时间＋before...。] 5．It was the middle of night before my father woke me up and told me to watch the football game.
________________________________________________________ 答案 before→when [根据句意可知，此处表示“当……的时候”。]
6．Actually, the London Olympic Park is built wherever there used to be a poor area called East London.
________________________________________________________
答案 wherever→where [根据句意可知，此处表示“……的地方”，故用where。] 7．Such long as he works hard, I don't mind when he finishes the experiment.
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________________________________________________________ 答案 Such→So/As [so/as long as是固定结构，意为“只要”。]
8．Misunderstandings arising from lack of social communication, if handled properly, may lead to serious problems.
________________________________________________________
答案 if→unless [根据语境可知，此处表示“除非，如果不”，故用unless。] 9．When advertisements are of great help, I don't think we should entirely rely on them.
________________________________________________________
答案 When→While/Although/Though [根据语境可知，此处表示“尽管”。] 10．We need some more facts and figures after we make the final decision. ________________________________________________________
答案 after→before [根据语境可知，此处表示“之前”，故用before。]
易错题一：地点状语从句中引导词的误用
[例1] What a neat philosophy it is never to give up looking for a way to
get ________ you're supposed to go!
[错解] what
[错因分析] 考生误以为这是一个宾语从句，从而错用what。 [答案] where [心得体会]
[例2] I can go ________ I want just by driving my own car. I feel the whole
world is under my control.
[错解] where
[错因分析] 考生误以为这是一个简单的地点状语从句，误填where。 [答案] wherever [心得体会]
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易错题二：原因、让步状语从句中引导词的误用
[例1] You cannot walk away just ________ someone tells you he doesn't want
to buy. As an assistant you should try your best to persuade our customers to buy something.
[错解] after
[错因分析] 不少考生根据对句子的理解易误用after。考生认为这里表示的是“你不能在顾客告诉你他不买之后就走开”。
[答案] because [心得体会]
[例2] Impressive ________ the record is, it fades next to the story of
Armstrong's struggle against disease.
[错解] although
[错因分析] 考生易误用although，因为考生可能仅注意到了前后两句话之间的让步关系。
[答案] as/though [心得体会]
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高考英语一轮复习专题9并列句和状语从句教学案
