1.疑问句：Does a dog have four legs?Yes,it is./ No ,it isn't.
否定句：A dog doesn't have four legs.
2.疑问句：Do you have a cat?Yes ,I do./ No,I don't.
否定句：I don't have a cat.
3.Do they have a big house?Yes ,they do./ No,they don't.
They don't have a big house.
4.Does your mother have a new car?Yes,she does./ No ,she doesn't.
My mother don't have a new car.
5.Does Tom's father have a bas?Yes,he does./ No ,he doesn't.
Tom's father doesn't have a bas.
6.Does your teacher have a round face?Yes,she does./ No ,she doesn't.
Our teacher doesn't have a round face.