This is a pen改为否定句，改为单复数转换改为一般疑问句或提问，肯定句做回答。

Question

如题所述

Answer 1

否定句：This isn't a pen
复数：These are pens
一般疑问句：Is this a pen？
肯定句 ：Yes，it is来自：求助得到的回答

Answer 2

This isn't a pen.
These are pens.
Are these pens?/ Is this a pen?
Yes, they are. /Yes, it is.

如有问题，欢迎继续追问：）
求采纳～追问

哪个否定句，哪个单复数转换，哪个一般疑问句或提问和肯定句回答。

追答

否定句
This isn't a pen.
单复数转换
These are pens.
一般疑问句提问
Are these pens?/ Is this a pen?
肯定句回答

Yes, they are. /Yes, it is.

本回答被提问者和网友采纳

Answer 3

THIS IS NOT A PEN.
THESE ARE PENS.
IS THIS A PEN?
YES,IT IS.追问

哪个否定句，哪个单复数转换，哪个一般疑问句或提问和肯定句回答。

追答

照你的顺序写的，你这样还分辩不清啊，