问题描述: make sure the door is locked,为什么有is,make sure 不就是谓语动词了吗 1个回答 分类:英语 2014-09-20 问题解答: 我来补答 make sure后面的the door is locked是宾语从句,省略了连接词that.the door is locked是被动语态,意即“门被关”.make sure the door is locked是“确信门关好了”的意思. 展开全文阅读