I have no choice but to give up.这一句型里but to give up做什么成分?
问题描述：
I have no choice but to give up.这一句型里but to give up做什么成分?
我知道它的意思 想请教一下语法上的结构,没问翻译呀，but到底是介词还是连词
答
but：prep.（介词）,后面的不定式是介词宾语,介词和介词宾语一起构成介词短语,在句中表选择,作状语
例句：He wanted nothing but to stay here for another day.他只是想在这再呆一天.
I have no choice but to tell you the truth.我只有告诉你实话.
There was nothing to do but (to) wait till help came.只有等待救援了.
* 如果谓语动词为实意动词do的某种形式时,but 后的不定式要省略符号to.如：
I can do nothing but let him know.我只能通知她.
They did nothing but complain.他们只是抱怨.