七年级英语寒假专题——句型之间转换的规则冀教版知识精讲.doc

初一英语寒假专题——句型之间转换的规则冀教版【本讲教育信息】一. 教学内容： 寒假专题——句型之间转换的规则（一）肯定句转换为否定句的规则：1、首先看句子中是否有情态动词can ,may ,must, could, should, would或 will等词中的任何一个如果有，则在该词后面加上 not ，句子其余部分都不变，原肯定句就变成了否定句例：（1）I can swim.→否定句：I can not swim.（2）We will go to Beijing tomorrow.→否定句：We will not go to Beijing tomorrow. 或We won’t go to Beijing tomorrow.2、其次，如果句中无上述情态动词，则看句中是否有be动词的各种形式如is ,am ,are或was , were 中的任何一个如果有，则在该词后面加上not ，句子其余部分都不变，原肯定句就变成了否定句例：（1）This is my book.→否定句：This is not my book. （2）They are pandas.→否定句：They are not pandas.3、如果句子中没有如上述1、2所列的动词，则先找出句中的动词。

1）如果句中动词为原形，则在该动词前面加don’t ，句子其余部分都不变，原肯定句就变成了否定句例：We like English.→否定句：We don’t like English.（2）如果句中动词为第三人称单数形式，则在该动词前面加doesn’t，之后动词变为原形，句子其余部分都不变，原肯定句就变成了否定句例：He likes English.→否定句：He doesn’t like English.（3）如果句中动词为过去式，则在该动词前面加didn’t，之后动词变为原形，句子其余部分都不变，原肯定句就变成了否定句例：We liked English.→否定句：We didn’t like English.（二）肯定句转换为一般疑问句的规则：1、首先看句子中是否有情态动词can ,may ,must, could, should，would或 will等词中的任何一个如果有，则将该词提到句子开头 ，句子其余部分都不变，句尾加“？”，原肯定句就变成了一般疑问句例：（1）He can swim.→疑问句：Can he swim?（2）He would like to go swimming.→疑问句：Would he like to go swimming?2、其次，如果句中无上述所列的情态动词，则看句中是否有be动词的各种形式，如is ,am ,are或 was , were 中的任何一个。

如果有，则将该词提到句子开头，句子其余部分都不变，句尾加“？”，原肯定句就变成了一般疑问句例：These are computers.→疑问句：Are these computers?3、如果句子中没有如上述1、2所列的动词，则先找出句中的动词1）如果句中动词为原形，则在句首加Do，其余部分都不变，句尾加“？”，原肯定句就变成了一般疑问句例：They like English.→一般疑问句：Do they like English?（2）如果句中动词为单三形式，则在句首加Does，动词单三形式变为原形，句子其余部分都不变，句尾加“？”，原肯定句就变成了一般疑问句例：He likes English.→一般疑问句：Does he like English?（3）如果句中动词为过去式，则在句首加Did，动词过去式变为原形，句子其余部分都不变，句尾加“？”，原肯定句就变成了一般疑问句例：They liked English.→一般疑问句：Did they like English?（三）肯定句转换为特殊疑问句的规则：1. 先把陈述句变成一般疑问句.例：She likes red. —Does she like red?2. 选择代替划线部分的疑问词放在一般疑问句之前，去掉划线部分。

对颜色提问应用What colour —What colour does she like?3. 如果划线部分是动词还要加一个do的适当形式I like swimming in summer.—Do you like swimming in summer?—What do you like doing in summer?【模拟试题】（答题时间：30分钟）1. We are in the same grade.（改为否定句）_______________________2. I can borrow those books from our school.（改为否定句）_______________________3. They have nice kites.（改为否定句）_______________________4. Open the door, please.（改为否定句）_______________________5. There are some apples on the trees.（改为否定句）_______________________6. We have many friends in China.（改成一般疑问句）_______________________7. Kate helps her mother with housework.（改成一般疑问句）_______________________8. They can stay at home for two days.（改成一般疑问句）_________________________________________________________9. She takes a shower at five o’clock. （对划线部分提问） ___________ _________ she _________ at five o’clock?10. I want to sleep a little longer because（因为）I’m tired. （对划线部分提问） ________ _______ ________ want to sleep a little longer? 11. Daniel watches TV every evening.（改为否定句） 12. I do my homework every day.（改为一般疑问句，作否定回答） 13. She likes milk.（改为一般疑问句，作肯定回答） 14. Amy likes playing computer games.（改为一般疑问句，作否定回答） 15. We go to school every morning.（改为否定句） 16. He speaks English very well.（改为否定句） 17. I like taking photos in the park.（对划线部分提问） 18. John comes from Canada.（对划线部分提问） 19. She is always a good student.（改为一般疑问句，作否定回答） 20. Simon and Daniel like going skating.（改为否定句） 【试题答案】1. We aren't in the same grade.2. I can't borrow those books from our school.3. They don't have nice kites.4. Don't open the door, please.5. There aren't any apples on the tree.6. Do you have many friends in China?7. Does Kate help her mother with housework?8. Can they stay at home for two days?9. What does do 10. Why do you11. Daniel doesn't watch TV every evening.12. Do you do your homework every day? No, I don't.13. Does she like milk? Yes, she does.14. Does Amy like playing computer games? No, she doesn't.15. We don't go to school every morning.16. He doesn't speak English very well.17. What do you like doing in the park?18. Where does John come from?19. Is she always a good student? No, she isn't.20. Simon and Daniel don't like going skating.。