题目内容：

改为祈使句 (1)You must hand in your homework on time.(2)You mustn't play baskerball in the street.
(3)You must keep quiet in the reading room.(4)You mustn't be late forschool.
(5)you shouldn't frighten the dog.(6)you can't swim in the river.(7)you can cross the road when the light is green.(8)you should listen carefully in class.

优质解答

Hand in your homework on time.
Don't play baskerball in the street.
Keep quiet in the reading room.
Don't be late forschool.
Don't frighten the dog.
Don't swim in the river.
Cross the road when the light is green.
Listen carefully in class.