“还原法”——解答疑难单选题的金钥匙
高考单选题的测试点本来十分简单，每年考点基本不变。但命题者会有意把题干复杂化，改写成一个少见或陌生的结构，来增加试题的难度。 ① It was ____back home after the experiment.(湖北卷)
A . not until midnight did he go B. until midnight that he didn’t go
C. not until midnight that he went D. until midnight when he didn’t go
根据题意应是表达：直到午夜时分他才做完实验回家。（not…until) _________________________________________________
温馨提示：当被强调的是not…until句型中的until引导的时间状语时， 要将not放在until的前面。基本句式为It is/ was +not until…that… （改为强调句）→
___________________________________________________________
1. 强调句还原成陈述句
② It was on the farm _____we worked ________I got to know her.
A. where; that B. Which; that C. which;which D. that;which 根据题意应是表达：我是在我们工作过的那家农场认识了她。
(改为强调句) →______________________________________________ Practise:
---------We haven’t seen each other for ages.
----------No, I don’t remember how many years ago______I last saw you. A. it was that B. was it that C. it was when D.was it when 2.. 被动语态还原成为主动语态
③John was made ___the truck for a week as a punishment. A. to wash B. washing C. wash D. to be washing 将题干还原成主动语态为：
在make sb. do sth.结构中，使役动词make等后的宾语补足语用__________，但在被动语态中要加上_____________, 因此被动结构为Sb. be made to do sth
3. 疑问句还原为陈述句
④ Is this the school ________ we visited 3years ago? ⑤ Is this school ________ we visited 3years ago? A. Where B.不填 C. the one D. in which
把句④ 还原成陈述句，就成了：
_______________________________________________________ 把句⑤ 还原成陈述句，就成了：
4. 感叹句还原成陈述句
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⑥ Oh, John , __________ you gave us!
A. How a pleasant surprise B. How pleasant surprise C. What a pleasant surprise D. What pleasant surprise 此题干为一个感叹句，还原成 陈述句为
(用what来改写感叹句）______________________________ （用how来改写感叹句）_________________________________ Practise
（考前演练Ⅱ） I realized how important it was ___ I took the first step and talked
to the girl.
A. that B.because C. why D. till
(考前演练Ⅰ）Do you remember how happy you were ____ for the job.？
A. to choose B. to be chosen C. choosing D. being chosen
5. 倒装语序还原成正常语序
⑦ So difficult _____ it to live in an English-speaking country that I was determined to learn English!
A. I have felt B. have I felt
C. I did feel D. did I feel
还原成正常语序为___________________________________________
6. 省略句还原成完整的句子
Tip: 省略句使考生不易看清句子结构。对于这类试题，可恢复被省略的成分，使句子结构变得明朗，进而选择合适的答案。 ⑧ John plays football _____, if not better than, David.
A. as well B. as well as C. so well D. so well as
应还原为：John plays football _____ David does, if John does not play better than
David does.
Practise
Most green vegetables, such as spinach cabbage（菠菜）,____for too long ,will lose nutrition.
A. if to be cooked B. if cooking
C. if cooked D. if being cooked
Generally speaking,_______ according to the directions , the drug has no
side effect.
A. when taking B. when taken C. when to take D. when to be taken 7. 将插入语去掉
Tip: 命题者有时会有意地在一个句子中间插入一个从句或插入语，造成主谓隔离。如果将题干中的从句或插入语去掉，题干就会变得很简单 ⑨ He has made another discovery, _____ of great use.
A. which I suppose are B. that I suppose it is C. I suppose which is D. which I suppose is
---I haven’t heard from Henry for a long time.
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---What do you suppose_______ to him?
A. was happening B. to happen C. has happened D. had happened 去掉本句中的插入语do you suppose, 原句则变为：
8. 将固定短语还原
Tip: 在此类考题中，题干为复杂句，句中被修饰的先行词有时与定语从句中 的动词可构成固定短语。因此，考生熟练掌握一定量的固定短语，有助于迅速发现此类结构。
⑩ That was _____ we had in Beijing 13 years ago!
A. wonderful time B. a wonderful time C. wonderful D. wonderfully
仔细阅读题干，不难发现该复合句中有一固定搭配______________; Practise ：My English teacher is really very kind.I’ll never forget the ____he has done me.
? A. favor B. deed C. help D. value 练习：运用合适的技巧选出下列各题正确答案。 1. ----What do you think made Mary so upset ? -----__________her new bike.
A. Lost B. As her new bike C.Losing D. Because of losing
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
2. ----What do you think made the fans so upset? ------ ___________________.(雅礼6,21)
A. Not Whitney Houston attending the 54th Grammy Awards ceremony B. Whitney Houston could not attend the 54th Grammy Awards ceremony C . Whitney Houston `s not attending the 54th Grammy Awards ceremony
D. Because Whitney Houston could not attend the 54th Grammy Awards ceremony （运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
3. When do you suggest ____________?(雅礼6,27)
A. the project be carried out B. that the project should begin C. should the project be carried out D. will the project begin
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。 3. Who would you rather _______the report?(长沙一中,27) A. have write B have to write C. write D.have written
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
4. Thank you for the great trouble you ’ve taken __________me with my
computer work. (长沙一中7,29)
A. with helping B. helping C. to help D. to have helped
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（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
5. I s there anyone who can tell me ___________ electricity is of great importance in our daily life? (长沙一中7,32)
A. why is it that B. why it is that C. it is that D. why is it
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。 6. I went to my adviser to ask him what course ________. A. should I take B. must I take C. to take D. take
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
7. Even if you have won great fame and success, without friends or family ______your happiness, your loneliness will make it hard for you to bear. A. with whom to share B. whom to share C. to share with D. who to share with
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。 8. -----Was it there______you were away to answer the phone ? ----- There is no doubt about it .
A. that B. which C. while D. where
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。
9. Distinguished guests and friends,welcome to our school ______the ceremony of the 50th Anniversary this morning are our alumni(校友) from home and abroad.(2009江苏卷)
A. attend B.to attend C. attending D.having attended
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。 10. In front of the farmhouse______________.
A .lay a boy B.laid a boy C.lie a boy D.did aboy lie
（运用还原法中的______________法；还原后的句子结构为_____________________________________.）所以选择________。 “还原法”——解答疑难单选题的金钥匙
1.强调句还原成陈述句
2.被动语态还原成为主动语态 3. 疑问句还原为陈述句 4. 感叹句还原成陈述句
5. 倒装语序还原成正常语序 6. 省略句还原成完整的句子 7. 将插入语去掉 8. 将固定短语还原
还原法可理清句子内部结构的关系,让我们把本来不难的考点把握得更准确！
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