1 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。2 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 breakfast Yes, they .13. I ________( don’t /doesn ’t ) play sports.14....