Is that your father?回答到底是什么?No,he is't.No,it is't.

问题描述:

Is that your father?回答到底是什么?
No,he is't.No,it is't.

如果是Is that your father?No,it isn't.(主语是this/that,通常用it回答)
如果是Is that man your father?No,he isn't.(本句主语是man)