do-does的用法和练习题

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 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

Eg. 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 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：

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)

Eg. 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.

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?

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 (be) on the teachers’ desk

对划线部分提问：are the books?

Exercise2

1.I go to Beijin(一般疑问句)

______ ______ __________ to Beijin?

2.We can see some birds.(一般疑问句)

______ ______ see __any_ 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)

______ he ________ apples?

4.Here are some banana s on the teachers’ desk.(一般疑问句)

______ ______ ______ flowers on the teachers’ 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)

he ______ very old.

7. It is green.(否定句)

______ ______ green.

8.I have some hot dogs.热狗(一般疑问句)

_______ __you_ ______ __any_ __hot__ dogs ?.

11.My pencils are in the pencil-box.(对划线部分提问)

______ ______ your pencils