l think he has a ping-pong ball.改为否定句是什么?

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/25 09:12:51

l think he has a ping-pong ball.改为否定句是什么?

l think he has not a ping-pong ball.改为否定句是什么?