改否定句 （讲义）人教PEP版英语六年级下册

改否定句：

1. 句子中有be动词（am，is，are），在be动词后面加not.

例如: She is a pupil.      She isn’t a pupil.

2. 句子中有情态动词（can,will,should,would,could，might），在情态动词后面加not.

例如：He can play football.          He can’t play football.

3. 句子中既没有be动词，又没有情态动词can,will,should,would，could，might时，先在动词前面加don’t 或doesn’t（第三人称单数时用doesn’t）.再将原句中的动词变为原型。

例如：The boy likes apples.         The boy doesn’t like apples.

      I have some books.         I don’t have any books.

注意：some改成any。

练习：1.I’m a student.

2. You’re sad.
3. She is a good girl.
4. I can swim.
5. You’ll go to the park.
6. I like English.
7. You have a pencil.
8. She likes singing.
9. She does her homework.

10.There are some students in the classroom.

改否定句专项习题

1.I like bananas.

2.He is here.

3.They are going to go fishing this weekend.

4.They are hard-working.

7.We can dance very well.

8.He will come to see you at the school gate.

9.They will clean the classroom tomorrow.

10.They do sports every day.

11.I often have breakfast at 7 a.m.

12.We do morning exercises on the playground.

13.He gets up at six.

14.Tom has something to tell his teacher.

15.My mother does some washing every morning.

16.Alice likes singing and dancing.

17.We have an English class on Mondays.

18.She puts his watch on the desk.

19. Lily is tall .

20.You had better give up smoking.

21.There are some apples on the tree.

22.Open the window.