No left tuen You must not be late for school.You must look both ways before crossing the road.

问题描述:

No left tuen You must not be late for school.You must look both ways before crossing the road.
You should be quiet in the reading room.
改为祈使句(全部)
No left tuen .
You must not be late for school.
You must look both ways before crossing the road.
You should be quiet in the reading room.
四句

Be quiet in reading room.
Looking both ways before crossing the road.