Sit on this seat, please.
Be a good person.
Don\\'t be a good person.
Sit on this seat.
Don\\'t sit on this seat.
Do your homework carefully.
Don\\'t do your homework carefully.
Read the new words for us.
Don\\'t read the new words for us.
Clean the room.
Don\\'t clean the room.
you can sit on this seat.改成祈使句
Please sit on this seat
Sit on this seat.也可以再加上please