题目内容：

把下列句子改为否定句 I have a ping--pong ball We have a basketball They have a new TV
They have many flowers
Mr Smith has a telephone
His aunt has a new TV
He has a nice room
There is an apple in the basket
There are some boys in ours class

优质解答

I don't have a ping--pong ball
We don't have a basketball
They don't have a new TV
They don't have many flowers
Mr Smith doesn't have a telephone
His aunt doesn't have a new TV
He doesn't have a nice room
There isn't an apple in the basket
There aren't some boys in ours class

追问：

Mr Smith doesn't have a telephone have为什么变原型了呢

追答：

主语是第三人称单数的否定句，要用助动词doesn't,后面的动词要改成原形

追问：

把下列句子改成一般疑问句并作肯定和否定回答 I have a ping--pong ball We have a basketball They have a new TV They have many flowers

追答：

Do you have a ping--pong ball? Yes,I do. No,I don't. Do you have a basketball? Yes,I do. No,I don't. Do they have a new TV ? Yes,they do. No,they don't. Do they have many flowers? Yes,they do. No,they don't.

追问：

Do you have a basketball? Yes,I do. No,I don't. 原句不是复数吗

追答：

you 本身既可做单数你，也可做复数 你们

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