情态动词的祈使句

来源：百度知道 编辑：UC知道 时间：2024/06/17 00:38:15
把You must keep quiet in the reading room.
You cannot swim in the river.
My brother is able to ski.改为祈使句
再+个：You must not read in the sun.

Please keep quiet in the reading room.(You be quiet in the reading room)
Don't(you) swim in the river.
My brother is able to ski.改为祈使句，没法改
Don't read in the sun.

keep quiet in the reading room．
do not swim in the river.
do not read in the sun.

My brother is able to ski.这个句子能改吗？