does he have a watch?改为复数句 i have a baseball.用peter代替ijane has some tennis rackets.改为否定句my sister has four pencil cases.改为一般疑问句并做否定回答they have a computer改为否定句
问题描述：
does he have a watch?改为复数句 i have a baseball.用peter代替i
jane has some tennis rackets.改为否定句
my sister has four pencil cases.改为一般疑问句并做否定回答
they have a computer改为否定句
答
Do they have watches?
Peter has a baseball.
Jane doesn't have any tennis rackets.
Does your sister have four pencil cases?
No,she doesn't.
They don't have a/any computer.