what和that引导从句的不同用法讲义--高三英语一轮复习.docx

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1、What和that 在从句中的用法区别一. What和that 都可以引导名词性从句(主语、宾语、表语、同位语从句)。That: 1不省略(宾语从句除外) 2不作成分 3.没词义What: 1有词义2作成分(从句中充当成分，常常作主语、宾语和表语)3不可省.例如：1) That you dont like him is none of my business. 2) Im writing to tell you (that) Li Hua is going to your city for a conference .3) The thought that he might fail in t

2、he exam worried him.(=The thought worried him that he might fail in the exam)4) What some scientists have found is that their long-term use can sometimes harm both the land and peoples health.5) What keeps them from doing so is the fact that chemical farming severs the high demand for food around th

3、e world.6） Li Ping is what is generally called a “living Lei Feng”7） Sydney kept his promise that he would always do what he could for Lucia to make sure of her happiness.8） After what seemed a century , he slowly opened his mouth and told the truth.9) No one really knows when the first people arriv

4、ed in what we know as California.二 that可以引导定语从句，有词义（指人或物），在定语从句中要充当成分，通常作定语从句中的主语、宾语。但 What不可以引导定语从句。例如：1) .All that I want to know is what he meant . What I want to know is what he meant.2) Another thing that I found very difficult was English grammar. What I found very difficult was English gramma

5、r.3) Sydney kept his promise that he would always do what he could for Lucia to make sure of her happiness. 宾语从句Sydney kept his promise that he would always do anything (that) he could for Lucia to make sure of her happiness. 定语从句 三.what作连词用,引导状语从句（=as）。句型为： A is to B what C is to D.Air is to us wha

6、t water is to fish.=Air is to us as water is to fish.Reading is to the mind what exercise is to the body .Personality is to a man what perfume is to a flower.填空练习：1._ we need at present is time .2. _ she wants to go there is obvious.3. To our surprise ,the result is _ they won the game.4. Is _ the g

7、irl wearing glasses told us true ?5._ impressed me most was _ such a little boy could play the violin so well.6.We should pay attention to _ the teacher is saying.7.I have no idea _ he did that last night. I have no idea _ he did that afternoon.8.The idea _the world may be destroyed by nuclear weapo

8、ns came to him.9. _he said so in the office made everyone present very surprised ._he said in the office made everyone present very surprised .10. On stepping into his room, he was astonished to find the floor covered with _looked like tiny insects.11.I dont know _ he intends to do in the future.12.

9、_ we cant get seems better than what we have .13.The trouble is _she has lost his telephone number .14.The news _ our team had won pleased everyone .15.The professor was very satisfied with _ his students had done in the experiment .16.I think it important _ we should learn English well when we are

10、young.17. Now it occurred to him _his farm had much potential and that the death of the cow was a bit of luck.18.The reason why he did not come is _he caught a bad cold. 19._fashion differs from country to country may reflect the culture differences from one aspect. 20. There is a new problem involv

11、ed in the popularity of private cars _ road conditions need improving.21. The fire which took place last night destroyed all _ was in the building . The fire which took place last night destroyed _ was in the building . 22.There is a popular belief among the students _one cannot hope to achieve succ

12、ess without hard work. 23. Although Anne is happy with her success she wonders _will happen to her private life.24. Word came_ another new research center would soon be set up.25_is so breathtaking about the experience is the out-of-this-world scenes. （2021全国1卷）.Key: 1.What 2.That 3.that 4.what 5.What;that 6.what 7.that;what 8.that 9.that;what 10. what 11. what 12.What 13.that 14.that 15.what 16.that 17.that 18.that 19.That 20.that 21.that ;what 22.that 23.what 24.that 25.What 学科网（北京）股份有限公司