内容正文:
助动词语法专项
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。
I know it.
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, 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。特别要注意have—has
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,谓语动词用回原型
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 = doesn’t, 谓语动词用回原型
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:
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 / 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)
Do you know it? Yes, I do./ No, I don’t .
Do they have two volleyballs Yes, they do./No, they don’t.
Do Tina and Tom 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 know your name Yes, he does./No,he doesn’t.
Does Tom need a computer game Yes, he does./No, he doesn’t.
4、 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)
They have two volleyballs. ------------What do they have
He knows my name. -------------What does he know
同步练习
一.找朋友
do does
He I she we it you they Jack and Tom a dog
二.选词填空
1. [Do/Does]______ he watch TV at night Yes, he .
2. [Do/Does]______ you go to school everyday No, I .
3. [Do/Does]______ Jack and Peter like apples
4. [Do/Does]______ Tina go swimming on Sunday
5. [Do/Does]______they play football Yes, they _ __[do/do