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1、 名词性从句名词性从句是一组词，它在句中起名词的作用。每个名词性从句至少要有一个主语和谓语。名词性从句是从属句子，在句子中可以做主语、宾语、表语或同位语。为了弄清名词性从句在句中的作用，我们要尝试着把句子转换成从句。首先，我们来看陈述句。陈述句转换成从句的方法是：把句子的首字母变为小写形式，去掉标点符号，然后添加that作为引导词。我们来看下面六个例子。 A new factory will be built nearby. Students should study 16 hours a day. Great Britain is made up of three countries. We
2、 will have the opportunity to live in an English-speaking country. The less you smoke, the better your health will be. We should buy more computers to save time.从句为：A. that a new factory will be built nearbyB. that students should study 16 hours a dayC. that Great Britain is made up of three countri
3、esD. that we will have the opportunity to live in an English-speaking countryE. that the less you smoke, the better your health will beF. that we should buy more computers to save time把从句填入空白处，然后指出从句类型。1. The reporter tells us A . (宾语从句)2. The suggestion B will lead to a heated debate. (同位语)3. C is
4、still unknown to many people. （主语）4. The chances D are small. （同位语）5. The belief of the doctor E is obvious. （同位语）6. His idea is F . (表语)引导词that只有引导名词性从句的功能，在从句中不担当任何成分。因此that引导的名词性从句是一个完整的陈述，从句中不缺任何成分。为了避免主语显得过长，我们通常用it作为句子的形式主语，把主语从句移到句尾。注意下面两组句子变化。That Great Britain is made up of three countries
5、is still unknown to many. It is still unknown to many that Great Britain is made up of three countries.高考真题： 1. We should consider the students request _ the school library provide more books on popular science. A. that B. when C. which D. where 【09重庆】 2. Modern science has given clear evidence _ sm
6、oking can lead to many diseases. A. what B. which C. that D. where 【2011天津】3. The traditional view is _ we sleep because our brain is “programmed” to make us do so. A. when B. why C. whether D. that 【07上海】 4. One reason for her preference for city life is _ she can have easy access to places like sh
7、ops and restaurants. A. that B. how C. what D. why 【2010上海】5. A warm thought suddenly came to me _ I might use the pocket money to buy some flowers for my mothers birthday. A. if B. when C. that D. which 【06安徽】 6. News came from the school office _ Wang Lin had been admitted to Beijing University. A
8、. which B. what C. that D. whether 【09四川】 7. The fact has worried many scientists _ the earth is becoming warmer and warmer these years. A. what B. which C. that D. though 【09江西】 8. It is obvious to the students _ they should get well prepared for their future. A. as B. which C. whether D. that 【09天
9、津】 8. It never occurred to me _ you could succeed in persuading him to change his mind. A. which B. what C. that D. if 【2010陕西】 10. It has been proved _ eating vegetables in childhood helps to protect you against serious illnesses in later life. A. if B. because C. when D. that 【08上海】11.-Its thirty
10、years since we last met.-But I still remember the story, believe it or not, _ we got lost on a rainy night. A. which B. that C. what D. when 【06四川】 12. Part of the reason Charles Dickens loved his own novel, David Copperfield, was _ it was rather closely modeled on his own life. A. what B. that C. w
11、hy D. whether 【2010北京】 13. The view _ many scientists hold is _ too much emission of carbon dioxide is destructive. 【09山东外国语学校】 A. what; that B. that; which C. that; that D. which; which 我们再看一般疑问句。一般疑问句转换成从句的方法是：把句子的首字母变为小写形式，去掉标点符号，然后添加whether或if作为引导词。我们来看下面六个例子。 Do your parents understand and supp
12、ort you? Will he take the job? Could you show me how to operate the air conditioner? Will we have enough money for our research? Will they be able to arrive in time for the party? Is it necessary for him to study abroad?从句为：A. whether/if your parents understand and support youB. whether/if he will take the jobC. whether/if you could show me how to operate the air conditionerD. whether/if we will have enough money for our researchE. whether/if they will be able to arrive in time for the partyF. whether/if it is necessary f
