Iam making a phone call. he is doing his homework. we are making a cake now. надо написать эти предложения в вопросительном виде и отрицательном)) ))

Am I making a phone call?
I am not making a phone call.
 Is he doing his homework?
 He is not doing his homework.                                                                                                                   Are we making a cake now?
We are not making a cake.