否定句：
1.The students don’t like helping the old man.
2.My cousin doesn’t study maths very hard.
3.It doesn’t seem you shouldn’t park cars hard.
4.I don’t jog to school every day.
5.At the moment,Ton is not playing the piano.
疑问句及肯定,否定问答
1.Do the students like helping the old man?
回答：Yes,they do.No,they don’t.
2.Does your cousin study maths very hard?
回答:Yes,he does.No,he doesn’t.
3.Does it seem you shouldn’t park cars hard?
回答：Yes,it does.No,it doesn’t.
4.Do you jog to school every day?
回答：Yes,I do.No,I don’t.
5.Is Ton playing the piano at the moment?
回答：Yes,he is.No,he isn’t.