Is this your pen Yes,I think it's her pen.请找出句子的错误

Is this your pen ? Yes, I think it's her pen.
正Is this your pen ? NO, I think it's her pen.

Yes改成no

This is your pen ? NO, I think it's her
我是英语老师，相信我

应该是NO不是YES。

Yes--No
Is this your pen ? No, I think it's her pen.
这是你的钢笔吗?不,我认为钢笔是她的.

This is your pen ? NO, I think it's her .

这句话的意思是
这是你的钢笔吗?是的,我想这是她的钢笔.
如果这样翻译过来肯定就是错的,那么这道题有两种改法：
1.把yes改成no:
is this your pen?no,I think it's her pen (hers)（这里her pen
可以用 hers 来代替）
2.把her 改成my
is this your pen yes,I think it's my pen(mine)( 这里my pen
可以用mine来代替）

Is this your pen ? No, I think it's hers.
Is this your pen ? Yes, I think it's not her pen.
Is this your pen ? Yes, I don't think it's her pen.
her pen=hers
三种答案。