助动词DO的讲解

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,助动词do初步讲解,一、什么是助动词,在英语中，,助动词本身没有意义，只是帮助实义动词完成某些语法功能，如构成否定句、疑问句、简略答语等,。,助动词主要有,be,，,do,，,have,等。,本单元我们主要探究,do,的基本用法。,二,.,助动词,do,的基本用法,do,有三种形式：,原形,现在式第三人称单数,过去式,（这里只需对此有基本了解即可）,do,的基本用法：,构成否定句,构成一般疑问句及回答,构成特殊疑问句,1.,原形,肯定式：,do,否定式：,do not,缩略否定式：,dont,用法：,do,用在第一人称单复数、第二人称单复数和第三人,称复数做主语，且时态为一般现在时的句子中。,举例：,I like that red dress.,否定句：,I dont like that red dress.,一般疑问句及回答,:,Do you like that red dress?,Yes,I do./No,I dont.,特殊疑问句,:,Which dress do you like?,2.,现在式第三人称单数,肯定式：,does,否定式：,does not,缩略否定式：,doesnt,用法：,does,用在第三人称单数做主语，且时态为一,般现在时的句子中。,注意：当,does,出现时，句子中用动词原形。,举例：,She likes that red dress.,否定句：,She doesnt like that red dress.,一般疑问句及回答,:,Does she like that red dress?,Yes,she does./No,she doesnt.,特殊疑问句,:,Which dress does she like?,3.,过去式,（基本了解即可）,肯定式：,did,否定式：,did not,缩略否定式：,didnt,用法：,did,用在时态为一般过去时的句子中,用于,所有人称。,注意：当,did,出现时，句子中用动词原形。,举例：,They wanted to go to Beijing.,否定句：,They didnt want to go to Beijing,.,一般疑问句及回答,:,Did they like want to go to Beijing?,Yes,they did./No,they didnt,.,特殊疑问句,:,Where did they want to go?,1.,What color()you like best?,A.do B.does C.are,2.What food()she like best?,A.do B.does C.is,3.Dos she()apples or pears?,A.likes B.like C.liked,4.,Do you like red?,().,A.Yes,I dont.B.Yes,I do.,C.No,I do.D.No,I doesnt.,ANSWERS:A B B B,EXERCISES,5.Do you have to go now?,肯定回答：,(),否定回答：,(),6.She has two brothers.,变为一般疑问句并做肯定回答：,(),7.They have,a football,.,对划线部分提问：,(),ANSWERS:,5.Yes,I do.No,I dont.,6.Does she have two brothers?Yes,she does.,7.What do they have?,THANK YOU !,GoodBye!,