第一句是祈使句,请不要开门.不能直接用not 而应该与助动词复合.Don‘t open the door,please第二句与第三句涉及like的用法Would you like to go skating with him?或者Would you like to skate with him?注意要用不...太感谢你了，O(∩_∩)O谢谢