什么情况下用“Yes,it is.” 什么情况下用"Yes,he(she)is."

题目

什么情况下用“Yes,it is.” 什么情况下用"Yes,he(she)is."
比如：“Is this Jim's watch?” 选哪一个
和“Is Jenny's ring very nice?”回答的一样吗?

答案

“Is this Jim's watch?”“Yes,it is.”
“Is Jenny's ring very nice?”"Yes,it is."
is 后面是物的用it.is后面是人的用he or she