They have a computer(改为一般疑问句).
____thet____a computer?
He has a tennis racket.（改为一般疑问句）
____he____a tennis racket?
Do you have a TV？（作肯定回答）
____，I____.
Does he have a ping-pong ball?（作否定回答）
____，he ____.
I have a soccer ball.(改为否定句)
I ____ ____ a soccer vall.