英语5A句型转换练习②：否定句
陈述句改否定句方法：
①在be动词（am/is/are）和情态动词(can, may, must...)后面加not，其它照写。some变成any. 
例如：陈述句: They are in the park.       He can play the guitar.
否定句: They are not in the park.   He can not play the guitar.
         或：  They aren’t in the park.   He can’t play the guitar.
is not=isn’t，are not=aren’t，can not=can’t ，am not 不能缩写  
练习：把下列句子变成否定句
1. I am listening to music.
2. Mike is a student.
3. Kate can clean the classroom.
4. They are in the zoo.
5. There are some flowers in the vase.
6. This is my sister.
7. We are sweeping the floor.
② 借助动词don’t/doesn’t,第三人称单数用doesn’t,其余人称用don’t，放到人称后面，动词前面其他照写。特别记住：前面用doesn’t, 后面的动词一定还原成原形。some变成any.
例如：陈述句:  I like the ducks.        He likes the dogs.
否定句：I don’t like the ducks.    He doesn’t like the dogs.
练习：把下列句子改为否定句。
11. We need some masks.                                         
12. They like making the puppet.                                   
13. Su Hai and Su Yang live in a new house.                          
14. I put a book on my head.                                       
15. They sing “In the classroom” together.                           
16. We play basketball on Sundays.                                  
17. Tom likes listening to music.                                     
18. I have a telescope.                                             
19. Mike has a pot.                                                 
20.  She has some blankets.                                         

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