Ответ:
Is she riding a bike? Yes, she is. No, she isn't
Are they standing? Yes they are. No they aren't
Is Alla teaching? Yes she is. No she isn't
Is Ivan running? Yes he is. No he isn't
Am I cooking? Yes I am. No I am not
Are the boys jumping? Yes they are. No they aren't
Are the girls talking? Yes they are. No they aren't
Is the girl swimming? Yes she is. No she isn't
Can they write? Yes they can. No they can't
Does he write? Yes he do. No he doesn't
Is he writing? Yes he is. No he isn't
Are they writing? Yes they are. No they aren't
Do they write? Yes they do. No they don't