You can not smoke here.You must not look out of the window.帮我把上面的几句英语改成祈使句.怎么改?还有一句:You may let the children play the piano

问题描述:

You can not smoke here.You must not look out of the window.
帮我把上面的几句英语改成祈使句.怎么改?还有一句:You may let the children play the piano