顺手采纳答案
That's a pen.一般疑问句：__。肯定回答：__。否定回答：__。
答案是 一般疑问句:Is that a pen ?那是钢笔吗？
肯定回答：Yes,it is.是的
否定回答：No.it isn't不是
Is that a pen?
Yes. That is
No, that is not
Is that a pen?
Yes, it is.
No, it isn't.
Is it a pen?
Yes ,it Is
No it isn 't
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