初一英语：把下列句子变成负数形式
问题描述：
初一英语：把下列句子变成负数形式
例：This is a pencil.------These are pencils.
1.That is a pen.--------().
2.What's this?------()?
3.Is this a chair?-------()?
4.No,it isn't------().
5.That is my teacher.-------().
答
1.Those are pens.
2.What're these?
3.Are these chairs?
4.No,they aren't
5.Those are my teachers.