Do和does用法解析

1、助动词包括 do, does的用法 do 用 于 当 主语 是 第 一 人称i, 第 二 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（第三人称包括事物或者人名等）。含有实义动词的句型结构变换一、肯定陈述句1 当主语是 i， you 及复数时，谓语动词用原型。eg. i know it. （ eg.表示例如的意思）she, he, it, this, that,单独的they have two volleyballs.tina and tom like ice cream.2. 当主语是

2、第三人称单数时（第三人称包括人名等）。谓语动词要变为第三人称单数形式。she, he, it, this, that,单独的事物或者p98 特别要注意 have haseg. she has a set of keys.he knows my name.tom needs a computer game.二、肯定陈述句变换成否定陈述句1 当主语是 i， you 及复数时，在谓语动词前加 do not = don t eg. i don t know it.they don t have two volleyballs.tina and tom dont like ice cream.2. 当主

3、语是第三人称单数时 ,在谓语动词前加 does not = doesnt, 谓语动词打回原型eg. she doesnt have a set of keys.he doesnt know my name.tom doesnt need a computer game.三、肯定陈述句变换成一般疑问句采用“一加二变三问号”。一加：当主语是 i， 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 ;第一人称变为第二人称（ i / we 变为 you, my /

4、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。肯定回答； yes, 主语 + do/ does.否定回答： no, 主语 +don t / doesn t . (主语要用相应的人称代词主格)eg. do you know it?yes, i do./ no, i don t .do they have two volleyballs?yes, they do./ no, they dont .do tina and tom like ice cream?yes, they do./ no, they don t.does she have a s

5、et of keys?yes, she does. / no, shedoesnt.does he know your name?yes, he does./no, he doesnt.does tom need a computer game?yes, he does./no, he doesnt.四、肯定陈述句变换成特殊疑问句 （对画线部分提问） 特殊疑问词 + 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?exercise1 ：把下列

6、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.i know the answer.否定句： i（ know ） the answer. 一 般 疑 问 句 ：you（know ） he answer?肯定回答：,i.否定回答：, i.对划线部分提问：2 he plays soccer every day.否定句： he（ play） soccer every day.一般疑问句：he（ play） soccer every day?肯定回答：, he.否定回答：, he.3.the books are on the teachers desk.否定句： the books(

7、be)on the teachersdesk 对划线部分提问：are the books?exercise21.i have been to beijin(一般疑问句 )2.we can see some birds一.(般疑问句 )_ _ _ to beijin?_ _ see _any_ birds?(any用在疑问句中，而 some用在陈述句中 )3.he designs clothes.一(般疑问句 )_ he _ clothes?4.there were some flowers on the teachers一般疑问desk句.)(_ _ _ flowers on the teac

8、hers desk?5.there were 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.i think he is very old.(否定句 )7.please colour it green.否(定句 )i _ think he _ very old._ _ colour it green.8.you may have some hot dogs一.(般疑问句 )_ _i_ _ _any_ _hot_dog?.10.this sign means“ no smoking. ”what _ this sign _?11.my pencils are in the pencil-box.(对划线部分提问 )_ _ your pencils?12.i got up at six ye