making sure that the door is locked before you leave the room 为毛是making 而不是make
问题描述：
making sure that the door is locked before you leave the room 为毛是making 而不是make
答
严格说来这不是一个独立句子.Make开头则是,是祈使句.making 开头这部分只能看作一个词组,可以做句子的伴随状语,不能独立成句.