改为祈使句（英语）You can't shout in the class room 写成Be quiet in the class room 可以吗?如果不可以那该怎么改?

You can't play football here（改为祈使句） You can't arrive late for class.(改为祈使句） You can't read in the sun.(改为祈使句） You can't shout in the library.(改为祈使句） You can't turn right here .(改为祈使句） You can't climb this ladder(改为祈使句） You can't be late for work.(改为祈使句） You can't turn right here .(改为祈使句） Kitty , you can't feed the elephant.(改为祈使句） You can‘t smoke here改为祈使句 You can't climb trees.改为祈使句 you can't make noise.改为祈使句 you can,t wait here改为祈使句 You can't write on the desk (改为祈使句）顺便解释一下什么是祈使句,怎么将句子改为祈使句 You can't eat in hallways.改为祈使句You can't eat in class.改为祈使句 把这句英语改为祈使句You mustn't play in the classroom.(改为祈使句） You can eat after class.（改为祈使句）We should get to school on time.(改为祈使句)We can't draw on the wall.(改为祈使句) You can't swim here.It's very dangerous.改为祈使句