be动词情态动词及助动词用法

七年级英语双休日作业

班级：姓名：等级

英语句型变化总结练习

1、含有be动词am，is，are构成的句子：

变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。

变否定句时直接在am，is，are后面加not即可。例如：

肯定句:He is a student. 一般疑问句: a student?

否定句: He a student. 肯定句：We are from China. 一般疑问句: from China?

否定句：We from China 2. 由情态动词can, may, should等构成的句子:

变一般疑问句时把can, may,提到句子的前面,句尾用问号即可.

变否定句时直接在can, may,后面加not即可. 例如:

肯定句: She can swim. 一般疑问句:she swim?

否定句: She swim.

3. 由行为动词构成的句子: 需要加助词do或does.

变一般疑问句时把do/does放在句子前面.

变否定句时在主语后面加don’t / doesn’t , 谓语用动词原形。例如:

肯定句: They play football after school.

一般疑问句: play football after school?

否定句: They football after school.

肯定句：Tom watches TV every day.

一般疑问句: Tom TV every day?

否定句: Tom TV every day.

注意：变否定句时相关词的改变

肯定句变否定句时，除将谓语变为否定式外，句中其他词语也可能随之改变：

如将some改为any，too和also改为either，and改为or等：There are some birds in the tree. 树上有些鸟。

→There aren’t ______ birds in the tree. 树上没有鸟。

He likes the book, too. 他也喜欢这本书。

→He doesn’t like the book, ______. 他也不喜欢这本书。He likes singing and dancing. 他喜欢唱歌和跳舞。

→He doe sn’t like singing ______dancing. 他不喜欢唱歌也

不喜欢跳舞。补充练习：

根据句后括号内的要求，填入句中所缺的词：

1. I know the answer. (一般疑问句)

______ ______ know the answer?

2. We can see some birds. (一般疑问句)

______ ______ see ______ birds?

3. There is a computer in the house. (一般疑问句)

______ ______ a computer in the house?

4. There are some flowers on the teachers’ desk. (一般疑问句)

______ ______ any flowers on the teachers’ desk?

5. There are some apples on the tree. (否定式)

There ______ ______ ______ apples on the tree.

6. I think he is old. (否定句) I ______ think he ______ old.

7. Open the window. (否定句) ______ open the window.

8. We can speak good English. (变否定句)

We ______ ______ speak good English.

9. Thank you for helping me. (同义句)

Thank you for ______ ______ .

10. Whose is this book? (同义句) ______ ______ is this?

11. This is her book. (同义句) This book ______ ______ .

12. Her sweater is red. (对划线部分提问)

______ ______ is her sweater?

13. My pencils are in the pencil-box. (对划线部分提问)

______ ______ your pencils?

14. I get up at six every day. (对划线部分提问)

______ ______ do you get up every day?

15. There are fifty students in my class. (对划线部分提问)

______ ______ students are there in your class?

16. These are cars. (用buses改写成选择疑问句)

Are these cars ______ ______ ?

17. The book is in my schoolbag. (变疑问句)

______ the book in your school-bag?

18. Two boys are in our house. (改为there be句型)

______ ______ two boys in our house.

19. Can you find the key? (作肯定回答) ______ ,I______ .

20. It’s Monday today. (对划线部分提问) ______ ______ is it today ?