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1、do, does的用法 do用于当主语是第一人称L其次人称you及复数时（复数包括 we, they, these, those及两个以上的人或者事物。 does用于当主语是第三人称单数时（第三人称包括she, he, it, this, that,单独的 事物或者人名等）。含有实义动词的句型结构变换一、确定陈述句1 .当主语是I, you及日数时，谓语动词用原型。Eg. I know it. （Eg.表示例如的意思）They have two volleyballs.Tina and Tom like ice cream.2 .当主语是第三人称单数时（第三人称包括she, he, it, t
2、his, that,单独的事物或者 人名等）。谓语动词要变为第三人称单数形式。特别要留意havehasEg. She has a set of keys.He knows my name.Tom needs a computer game.二、确定陈述句变换成否定陈述句1 .当主语是L you及复数时，在谓语动词前加do not don tEg. I don t know it.They don t have two volleyballs.Tina and Tom don t like ice cream.2 .当主语是第三人称单数时，在谓语动词前加does not = doesnt,谓语动
3、词打回原型Eg. She doesn t have a set of keys.He doesn t know my name.Tom doesn t need a computer game.三、确定陈述句变换成一般疑问句接受“一加二变三问号:一加：当主语是L you及复数时，在句子开头加do;当主语是第三人称单数时（第三人称包括she, he, it, this, that,单独的事物或者 人名等），在句子开头加does;二变：变大小写；第一人称变为其次人称（I / we变为you, my / our变为your）；当主语是第三人称单数时，谓语动词要打回原型。三问号：在句末加问号。确定回答
4、；Yes,主语+ do/ does.否定回答：No,主语+don t/docsn t.（主语要用相应的人称代词主格）Eg. Do you know it?Do they have two volleyballs? Do Tina and Tom like ice cream?Does she have a set of keys?Does he know your name?Yes, I do. / No, I don t.Yes, they do. / No, they don t.Yes, they do. / No, they dont.Yes, she does. / No, she
5、doesnt.Yes, he does. /No, he doesn t.四、确定陈述句变换成特别疑问句（对画线部分提问） 特别疑问词+一般疑问 句？（去掉画线部分）Eg. They have two volleyballs.What do they have?He knows my name.What does he know?Exercise 1 ：把下列句子变成否定句，一般疑问句并做出肯否定回答，并对划线部分提问。1.1 know the answer.否定句：I （know） the answer.一般疑问句： you （know） he answer?回答：J L否定回答：J .对划
6、线部分提问：2 He plays soccer every day.否定句： He （play） soccer every day.一般疑问句： he （play） soccer every day?确定回答：,He L否定回答：,He L3 .The books are on the teachers desk.否定句：The books （be） on the teachers? desk对划线部分提问： are the books?Exercise21.1 go to Beijin（一般疑问句）to Beijin?2 .We can see some birds.（一般疑问句）see a
7、ny birds?（any用在疑问句中，而some用在陈述句中）3 .He likes apples.（一般疑问句）heapples?4 .Here are some bananas on the teachersdesk.（一般疑问句）flowers on the teachers5 desk?5 .There are some apples on the tree.（否定句）There any apples on the tree.（any 用在疑问句中，而 some 用在陈述句中）6 he is very old.（否定句）hevery old.7 . It is green.（否定句）green.8.1 have some hot dogs.热狗（一般疑问句）youany hot dogs ?.11.My pencils are in the pencil-box.（对划线部分提问）your pencils