Are those Chinese books?Yes,they'are.这是病句,问题出在哪边

问题描述:

Are those Chinese books?Yes,they'are.
这是病句,问题出在哪边

Yes,they'are.
一般疑问句 的回答中
Yes 后面不能用缩写形式
而且they are的缩写应该是they’re