1个回复

1. It is a watch
改为一般疑问句：Is it a watch?
做肯定回答： Yes, it is.
做否定回答： No. it isn't.
将原句改为否定句：It isn't a watch.
改为复数形式： Tey are some watches.
2.Bill's ruler is in the pencil-box.
改为一般疑问句： Is Bill's ruler in the pencil-box?
做肯定回答： Yes' it is.
做否定回答： No, it isn't.
将原句改为否定句： Bill's ruler isn't in the pencil-box.
改为复数形式： Bill's rulers are in the pencil-box.
3.I have a baseball.
改为一般疑问句： Do you have a baseball?
做肯定回答： Yes. I do.
做否定回答： No, I don't.
将原句改为否定句： I don't have a baseball.
改为复数形式： We have some baseball.
4.He has a tennis ball.
改为一般疑问句： Does he have a tennis ball?
做肯定回答： Yes, he does.
做否定回答： No, he doesn't.
将原句改为否定句： He doesn't have a tennis ball.
改为复数形式： They have some tennis balls.