为什么It's one of the important problems to be solved tomorrow 名词后非谓语用to be done 而He is looking for a place to live in.用 to
问题描述：
为什么It's one of the important problems to be solved tomorrow 名词后非谓语用to be done 而He is looking for a place to live in.用 to do
答
很高兴为您
It's one of the important problems to be solved tomorrow 名词后非谓语用to be done
to be done 一般表示 “有待被做”,动作未发生,并且是被动语态.因为不定式修饰的problem不能自己解决,只能被解决,所以用被动 to be solved.
He is looking for a place to live in.
to live in 宾补,主语是he,与动作间是主动关系,所以用主动语态的不定式to do.
-------------------------------
★倾心解答★愿您满意★
★欢迎追问★敬请采纳★
-------------------------------