助动词do/does的用法专题助动词do与does口诀（一）(do )变句型，先观察，陈述句中动用原,一般疑问do提前，否定dont实动前。（二）(does)若是主语为三单，陈述句中动变形，一般疑问也简单，does放在句子前，否定doesnt实动前，主动出现动还原。总结： 含有实义动词的句子，进行句子转换时应借助于助动词do/does，主语是三单(he,she,it)时用does，其他用do。否定句在动词原形前加dont /doesnt，一般疑问句把do/does提前,特殊疑问句由特殊疑问词+一般疑问句。句子类型及结构肯定句：主语+动词+其它。主语是三单，动词用三单I like this blue sweater. Tom likes this blue sweater.我喜欢这件蓝色的毛衣。 Tom喜欢这件蓝色的毛衣。Tom likes English. Tom喜欢英语。I like this blue sweater.Tom likes English.否定句：主+ dont/doesnt+动原+其它I dont like this blue sweater.我不喜欢这件蓝色的毛衣。Tom doesnt like English. Tom不喜欢英语。I like this blue sweater.Tom likes English.一般疑问句：do/does提前，其它照抄不变（Do /Does+主+动原+其它？），一人称变二人称。回答：Yes,主+do/does. No,主+ dont/doesnt.Do you like this blue sweater?Yes, I do. / No, I dont.你喜欢这件蓝色的毛衣吗？是的，我喜欢; 不，我不喜欢。Does Tom like English？Yes,he does. /No.he doesnt. Tom喜欢英语吗？是的，他喜欢；不，他不喜欢。练一练：一、选择适当的词填空（用do 和 does/dont doesnt填空）1. you like soccer? Yes, I . 2. they like ping-pong? Yes, they . 3. Tony and Ben like baseball? No, they .4. your friends like tennis? Yes, they . 5. your brother like basketball? No, he .6. you like basketball? Yes, I . 7. they like salad? No, they .8. Jenny have white sweaters? Yes, she .9. Peter have black trousers? Yes, he .10. your father like apples? Yes, he .11. your friends like bananas? No, they .12. your father and mother have milk for breakfast ? Yes, they .13. I _( dont /doesnt）play sports.14. You _( dont /doesnt）like ice-cream.15. .My parents_( dont /doesnt） want to watch TV.16. His friend _( dont /doesnt）eat breakfast.17. Mary _( dont /doesnt）like salad.18. he have a tennis ball? Yes, he .19. Anna have a ping-pong bat? Yes, she .20. Mike and Eric have some balls? No, they 二.按要求完成句子。1. Jenny has a ping-pong bat. (改为一般疑问句) _ Jenny _a ping-pong bat? 2. I like to eat vegetables every day. (改为一般疑问句) _ you like to eat vegetables every day?3. They like bananas. (改为否定句) They _ _ bananas.4. Tom likes apples.(改为一般疑问句) _ Tom _ apples?5. Does John like chicken?(否定回答) _ , _ _. 6.I like salad. (改为一般疑问句) _ _ _ salad?7.Do you like bananas? (作肯定回答) _ , _ _.8.Do they like milk? (作否定回答) _, _ _.9.Does he like milk? (作否定回答) _, _ _10.I like tomatoes. (把I改成 he重写句子)He _ _.11.Linda and Alice like carrots. (改为一般疑问句并作肯定回答) _ ? _ .12.你喜欢西红柿吗? _ you like _?13.你弟弟喜欢鸡蛋吗？不，他不喜欢。 _ your brother _ _ ? No, he _ . 14.I have three English books. (改为否定句) I three English books.15. I have a new volleyball. (改为一般疑问句) a new volleyball?16. Does Li Lei have a tennis ball? ( 作否定回答) ， .17. I have a computer. (改为否定句) I a computer.18. She has a ping-pong ball. (改为一般疑问句) she a ping-pong ball?19. Does Helen have a dictionary? (作肯定回答) ， .20. Tony has a baseball bat. (改为一般疑问句) _ Tony _a baseball bat? 五：翻译（将中文翻译成英文）1你喜欢香蕉吗？是的，我喜欢。 2你妈妈喜欢苹果吗？是的，她喜欢。 3他喜欢篮球吗？是的，他喜欢。 4他们喜欢足球吗？是的，他们喜欢。 5Jenny有裙子吗？是的，她有。 6Tom有黑色长裤吗？不，他没有。 7你爷爷有钢笔吗？不，他没有。 8你爸爸和妈妈喜欢西红柿吗？是的，他们喜欢。 答案如下：一、选择适当的词填空（用do 和 does/dont doesnt填空）21. Do you like soccer? Yes, I do . 22. Do they like ping-pong? Yes, they do . 23. Do Tony and Ben like baseball? No, they dont .24. Do your friends like tennis? Yes, they do . 25. Does your brother like basketball? No, he doesnt .26. Do you like basketball? Yes, I do . 27. Do they like salad? No, they dont .28. Does Jenny have white sweaters? Yes, she does .29. Does Peter have black trousers? Yes, he does .30. Does your father like