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1、助动词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、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） They have two volleyballs. Tina and
2、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, this, 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。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 kn
3、ow 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 = doesn’t, 谓语动词打回原型 Eg. She doesn’t have a set of keys. He doesn’t know my name. Tom doesn’t need a computer game. 三、肯定陈述句变换成一般疑问句采用“一加二变三问号”。 一加
4、： l 当主语是I， you及复数时，在句子开头加do; l 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： l 变大小写; l 第一人称变为第二人称（I / we变为you, my / our变为 your）； l 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
5、) Eg. Do you know it? Yes, I do. / No, I don’t . Do they have two volleyballs? Yes, they do. / No, they don’t . DoTina andTom like ice cream? Yes, they do./No, they don’t. Does she have a set of keys? Yes, she does. / No, she doesn’t. Does he k
6、now your name? Yes, he does. /No, he doesn’t. Does Tom need a computer game? Yes, he does. /No, he doesn’t. 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. -------
7、------What does he know? 练习一．找朋友。dodoesHe I she we it you they JackandTom adog二．选词填空。1.[Do/Does]______hewatchTVatnight? Yes,he.2.[Do/Does]______yougotoschooleveryday? No,I.3.[Do/Does]______JackandPeterlikeapples?4.[Do/Does]______TinagoswimmingonSunday?5.[Do/
8、Does]______theyplayfootball?Yes,they___[do/does]6.[Do/Does]______wehaveagoodteacher?Yes,we____[do/does]7.[Do/Does]_____theyjumprope?No,they___[donot/doesnot].8.[Do/Does]_____yourdo
