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don’t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doesn’t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don’t /doesn’t，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+ don’t/doesn’t+动原+其它I don’t like this blue sweater.我不喜欢这件蓝色的毛衣。

Tom doesn’t 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+ don’t/doesn’t.Do you like this blue sweaterYes, I do. / No, I don’t.你喜欢这件蓝色的毛衣吗是的，我喜欢; 不，我不喜欢。

Does Tom like EnglishYes,he does. / doesn’t.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/don’t doesn’t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 breakfastYes, they .13.I ________( don’t /doesn’t）play sports.14.You _________( don’t /doesn’t）like ice-cream.15..My parents________( don’t /doesn’t） want to watch TV.16.His friend _______( don’t /doesn’t）eat breakfast.17.Mary _______( don’t /doesn’t）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 bat2. I like to eat vegetables every day. (改为一般疑问句)______ you like to eat vegetables every day3. They like bananas. (改为否定句)They ______ ______ bananas.4. Tom likes apples.(改为一般疑问句)______ Tom ______ apples5. Does John like chicken(否定回答)— _______ , ________ _______.like salad. (改为一般疑问句) _______ ______ ________ saladyou like bananas (作肯定回答) _______ , ________ _________.they like milk (作否定回答) ________, ______ _________.he like milk (作否定回答) _______, _______ ________like tomatoes. (把I改成 he重写句子)He _________ ___________.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 _________ . 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 volleyball16. 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 ball19. 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。

5．Jenny有裙子吗是的，她有。

6．Tom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/don’t doesn’t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 don’t .24. Do your friends like tennis Yes, they do .25. Does your brother like basketball No, he doesn’t .26. Do you like basketball Yes, I do .27. Do they like salad No, they don’t .28. Does Jenny have white sweaters Yes, she does .29. Does Peter have black trousers Yes, he does .30. Does your father like apples Yes, he does .31. Do your friends like bananas No, they don’t .32. Do your father and mother have milk for breakfastYes, they do .33.I _____don’t__( don’t /doesn’t）play sports.34.You _____don’t____( don’t /doesn’t）like ice-cream.35..My parents__don’t______( don’t /doesn’t） want to watch TV.36.His friend __doesn’t_____( don’t /doesn’t）eat breakfast.37.Mary __doesn’t_____( don’t /doesn’t）like salad.38.— Does he have a tennis ball —Yes, he does .39.— Does Anna have a ping-pong bat —Yes, she does .40.— Do Mike and Eric have some balls —No, they don’t二.按要求完成句子。

1. Jenny has a ping-pong bat. (改为一般疑问句)__Does___ Jenny _have____a ping-pong bat2. I like to eat vegetables every day. (改为一般疑问句)___Do___ you like to eat vegetables every day3. They like bananas. (改为否定句)They __don’t____ ___like___ bananas.4. Tom likes apples.(改为一般疑问句)_Does_____ Tom __like____ apples5. Does John like chicken(否定回答)—__No_____ , ___he_____ ____doesn’t___.like salad. (改为一般疑问句) _Do______ ___you___ __like____ saladyou like bananas (作肯定回答) _Yes____ , _____I___ ____do_____.they like milk (作否定回答) __No____, __they_____don’t________.he like milk (作否定回答) ___No____, ____he___ _doesn’t_______like tomatoes. (把I改成 he重写句子)He __likes_______ ____tomatoes_______.and Alice like carrots. (改为一般疑问句并作肯定回答)___Do Linda and Alice like carrots______ ___________Yes, they do______ .12.你喜欢西红柿吗 __Do_______ you like ______tomatoes_____13.你弟弟喜欢鸡蛋吗不，他不喜欢。