is that his jacket? (作否定回答) is this her key?(作肯定回答)

问题描述:

is that his jacket? (作否定回答) is this her key?(作肯定回答)
it is her blue bike(自行车).(改为同义句).
____bike____ _____.

No ,it isn't.
Yes,it is.
the blue bike is hers.