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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.
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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 doesn’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.
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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 ?
be动词-情态动词及助动词用法
