情态动词的祈使句
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.
人气：108 ℃ 时间：2020-03-28 14:33:29
解答
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.
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