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， 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， 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.
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 sweater?Yes, I do. / No, I don’t.
你喜欢这件蓝的毛衣吗？是的，我喜欢; 不，我不喜欢。
Does Tom like English？Yes,he does. /No.he 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 .
blue什么特殊意思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 ________( 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 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。
5．Jenny有裙子吗？是的，她有。
6．Tom有黑长裤吗？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 .
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