This is a book的否定句,一般疑问句,及肯定,否定回答

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/13 16:36:20

This isn't a book.
Is this a book?
Yes,it is.
No,it isn't.
请指出,希望能和你一起探讨~
如果认为我的回答好的话,请及时采纳,
再问：我想请问，This isn't a book.和This is not a book.哪个对？？？？
再答：都对，isn't是is not的简写。

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