为你解答。
I am running.
一般疑问句：Are you running?
否定回答：No, I am not.
肯定回答：Yes, I am.
They are doing some shopping.
一般疑问句：Are they doing any shopping?
否定回答：No, they aren't.
肯定回答：Yes, they are.
She is reading a book.
一般疑问句：Is she reading a book?
否定回答：No, she isn't.
肯定回答：Yes, she is.
Mike is swimming in the pool.
一般疑问句：Is Mike swimming in the pool?
否定回答：No, he isn't.
肯定回答：Yes, he is.
We are having a party.
一般疑问句：Are you having a party?
否定回答：No, we aren't.
肯定回答：Yes, we are.
追问否定句...
追答恭喜你开窍了。