用还原法巧解单项填空题有一些单项选择题的测试点本来十分简单，但命题者有时故意把题干变复杂，将一个同学们熟悉的结构巧妙地改写为一个大家不熟悉的结构，以增加试题的难度或灵活性。对于这类题，同学们可以反其道而行之，即把题干还原成自己熟悉的结构，这样题目就会变得简单，答案就会一目了然，具体来说，可采用以下几种方法：一、将倒装句还原成陈述句由于倒装句的使用，句子的结构变得陌生，对于这类题，可将题干还原成一个陈述句。如：1. Who did the teacher ______ an article for the school newspaper?A. has write B. has written C. have write D. have written【分析】把本题题干改成陈述句，则应是：The teacher had who write an article for the school newspaper. 这样我们一眼就可以看出答案为C。测试的知识点是使役动词have的宾语补足语用省去to 的动词不定式。2. I finally got the job I dreamed about. Never in my life ______ so happy!A. did I feel B. I felt C. I was felt D. was I felt【分析】本题的答案选A。如果将这个句子改为陈述句后我们便可以很容易地看出其结构为：I never felt so happy in my life. 由于命题时将句子改写成倒装句，题目便具有很大的迷惑性。二、将陈述句还原成倒装句有些句型，由于平时同学们见到其倒装的形式比较多，但命题者却故意使用陈述句来命题。如：1.We had ______ left home than it began to rain.A. no soonerB. hardly C. almost　D. nearly【分析】No sooner...than是一个大家十分熟悉的句型。在考查知识点时，命题者却使用了一个陈述句。如果把题干改成：______ had we left home than it began to rain. 这道题的答案A也就变得十分清楚了。 2.We had ______ arrived at the railway station when the train began to move.A. no soonerB. hardlyC. almost D. nearly【分析】如果把本题改为倒装句,句子的结构就变得很熟悉了，本题考查的是句型hardly...when，因此，答案应为B。[1][2][3][4]下一页 说明:引用此文请注明出处,并请保留该文章链接地址,谢谢~~三、将被动句还原成主动句由于被动句的使用，句子的结构相对于主动句来说就没有那么清楚。我们如果将其改为主动句，这类题就会变得清楚得多。如：1.Time should be made good use of ______ our lessons well.A. learningB. learned C. to learn D. learns【分析】将题干改写为主动句，则为：We should make good use of time ______ our lesson well. 由此可见介词of 有其相应的宾语，其后不能再用动名词做宾语，应选不定式做目的状语。答案是C。 2.The little boy was caught ______ in the shop.A. to stealB. stealing C. steal D. stole【分析】改为主动句，则为：The salesman caught the boy ______ in the shop.很容易看出考查的知识点是catch sb doing sth，故应选B。四、将感叹句还原成陈述句感叹句的基本结构是：What + (a / an) + 形容词 + 名词 + 主语 + 谓语 + 其他！How + 形容词 / 副词 + 主语 + 谓语 + 其他！假若这类感叹句结构较复杂，尤其是当它同时还运用了某个特殊句型时，许多同学会看不出它是一个感叹句，此时若能还原出其陈述句的基本结构，问题就会变得很简单。如：1. How clever _______ you two to refuse his “kind” invitation! A. to B. for C. at D. of此题涉及的基本句型是：It is clever of sb to do sth. 若将其还原成陈述句即为：It was clever of you two to refuse his “kind” invitation. 显然答案选D。2. What a good time we had _______ with the farmers in the countryside!A. work B. to work C. working D. worked此题涉及的基本结构是：have a good time (in) doing sth。若将其还原成陈述句即为：We had a good time working with the farmers in the countryside. 可见答案应选C。五、省略句还原成完整句省略句使考生不易看清句子的结构。对于这类试题，可恢复被省略的成分，使句子的结构变得明朗，进而选择合适的答案。如：1.—How long has China been open to the world? —______1979.A. After B. In 　C. SinceD. From【分析】将答语部分改为一个完整的句子：China has been open to the world since 1979. 在所给的选项中只有since能和现在完成时连用。故答案为C。2.—What made her mother so angry?—______ the exam.A. Because she didn’t pass B. Her not passingC. She didn’t pass D. Because her not passing【分析】将答语部分补全应为：______ the exam made her mother so angry. 由此可以看出句子缺主语。而能用作主语的只有答案B(为动名词的复合结构)。 下一页 说明:引用此文请注明出处,并请保留该文章链接地址,谢谢~~六、将强调句还原成非强调句即将强调句中的结构词it be和 that去掉，使之成一个非强调句。如： 1. It was ______ computer games th