八年级上册变否定句的方法和练习题

1、八年级上册变否定句的方法和练习题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. m a cook. -im not a cook. is watching tv. -tom isnt watching tv.3. they were students in a school 10 years werent students in a school 10years ago.4. she is going to study computer science. -she

2、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. will go to shanghai next wont go to shanghai next year. should come back on 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。过去时用didnt; 一般现在时,当主语是第三人称单数(he

3、, 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, too.i cant read english books

4、, 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. (改为否定句) she _ _ to practic

5、e 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动词和情态动词的句子变否定句:1. she did her homewo

6、rk 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 vacation last year.2. i brought s

7、omething 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 exercise. (改为否定句)we_ _keep in

8、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 can stand staying in a noisy

9、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 healthy.13. people will cut d

10、own 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.16. he needs one spoon of hon

11、ey (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 evening. (改为否定句)im _ _ to have a

12、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 to