八年级上册变否定句的方法和练习题(共6页)

1、变否定句的方法及习题：一、 句中有Be(am,is,are,was,were)动词的时候，直接在Be(am,is,are,was, were)动词后加not, 通常缩写。Lg. 1.Im a cook. -Im not a cook.2.Tom is watching TV. -Tom isnt watching TV.3. They were students in a school 10 years ago.-They werent students in a school 10years ago.4. She is going to study computer science. -Sh

2、e isnt going to study computer science. 2、 句中有情态动词时候，在情态动词（can, may, must, might, will, would, should）后加 not, 通常缩写。Lg.1.I will go to Shanghai next year.-I wont go to Shanghai next year.2.She should come back on time.-She shouldnt come back on time.3、 句中没有Be动词和情态动词的时候，在动词前面加dont、doesnt或didnt，动词用原形。过去

3、时用didnt; 一般现在时,当主语是第三人称单数(He, She,It, 或单个的人或物)的时候用doesnt，其它都用dont.Lg. 1. I went to New York City last year. -I didnt go to New York City last year.2. She often exercises. - She doesnt often exercise.注意：1.通常some改为any, too改为either; 例如：I have some books-I dont have any books.I can read English books, t

4、oo.I cant read English books, either. 分类练习：一 含有be动词的句子变否定句：1. They are playing basketball with their teacher. (改为否定句) They_ _basketball with their teacher.2. They were teachers in this school 5years ago. (改为否定句) _ _ teachers in this school 5 years ago.3. She is going to practice basketball every day

5、. (改为否定句) She _ _ to practice basketball every day.二 含有情态动词的句子变否定句：1. I will go to the movies with my classmates. (改为否定句)I_ _ to the movies with my classmates.2. She can sing well. (改为否定句)She_ _ well.3. Everyone should study hard for their hope. (改为否定句)Everyone _ _hard for their hope. 三 没有be动词和情态动词的

6、句子变否定句:1. She did her homework yesterday. (改为否定句)She_ _ her homework yesterday.2. Lucy hurt herself in class. (改为否定句) Lucy_ _herself in class.3. She has to go there on foot. (改为否定句)She_ _ to go there on foot.综合训练(改为否定句) ：1. She went to Hainan for vacation last year. (改为否定句) She_ _to Hainan for vacat

7、ion last year.2. I brought something special to Tom yesterday. (改为否定句) I_ bring _ special to Tom yesterday.3. She goes to school at 7:00 on weekdays. (改为否定句)She_ _ to work at 7:00 on weekdays.4. He does his homework at 8:00. (改为否定句)He_ _ his homework at 8:00. 5. We can keep in good health through ex

8、ercise. (改为否定句)We_ _keep in good health through exercise.6. She sings more clearly than Lucy. (改为否定句)She_ _more clearly than Lucy.7. My father can play the drum well.(改为否定句)My father_ _ the drum well.8. Sunny Theater has the worst sound in town. (改为否定句)Sunny Theater _ _the worst sound in town.9. I c

9、an stand staying in a noisy room. (改为否定句)I _ _ staying in a noisy room.10. They are going to the West Lake. (改为否定句)They_ _ to the West Lake.11. He can play the violin, too. (改为否定句)He _ play the violin,_. 12. We are going to do more exercise to keep healthy. (改为否定句)We_ _ to do more exercise to keep h

10、ealthy.13. People will cut down more trees for money in 2080. (改为否定句)People _ _down more trees for money in 2080. 14. The old mans life will be better. (改为否定句)The old mans life_ _better.15. Everyone should play a part in protecting wild animals. (改为否定句)Everyone_ _ a part in protecting wild animals.1

11、6. He needs one spoon of honey (改为否定句)He _ _ one spoon of honey. 17. I think it will take me an hour to finish it. (改为否定句)I _ think it _ take me an hour to finish it. 18. You should cook it for at least half an hour. (改为否定句)You_ _ it for at least half an hour. 19. Im going to have a party this eveni

12、ng. (改为否定句)Im _ _ to have a party this evening. 20. Jenny has to help her parents.(改为否定句)Jenny_ _ to help her parents.21. I think they had a good time at the party yesterday. (改为否定句)I_ think they _a good time at the party yesterday.22. They traveled to Lijiang last summer. (改为否定句)They_ _ to Lijiang last summer. 23. I think there will be more water pollution.(改为否定句)I _ think there _be more water pollution.24. We need two bananas to make the milk shake. (改为否定句)We _ _two bananas to make the milk shake. 25. She is going to buy some clothes for her mother tomorrow.(改为否定句)She_ going