短语 be supposed to为什么suppose是过去式？

Question

be supposed to如果后面接动词是是不是be supposed to be done？

Answer 1

不要这样理解，你只要记住be supposed to是个固定搭配就行，意思是应该怎么样，这后面是跟动词原形，be supposed to do追问

例句：Glories are supposed to be achieved.这里后面也不是动词原型啊

追答

是动词原形啊，be就是呀

只不过这里后面跟的是被动语态，所以是be+动词过去分词