See to it that all the light (are) turned off before you leave.为什么写are?为什么 should be不行.
问题描述：
See to it that all the light (are) turned off before you leave.为什么写are?为什么 should be不行.
答
1 在句型 see to it that 句子 裏面,see to it that 句子（谓语动词是一般现在时）.所以,你的句子裏面用的是are turned off,而不是 should be turned off,也不是 must be turned off.相同的结构还有：make sure that...