She didn´t have the courage to refuse这句话里的to refuse是做courage的定语吗，如果是的话，请问这个不定式和被修饰的词有什么逻辑关系呢？
解答：网友理解是正确，不定式to refuse 是作前面名词the courage的定语成分。不定式和被修饰词属于“描述关系”
作后置定语的动词不定时与被修饰的名词/代词主要存在以下几种逻辑关系。结构为“名词/代词+to do”
【1】主谓关系
He is always the first person to arrive and the last person to leave.他总是第一个达到最后离开的人.
Who was the first man to walk on space?谁时第一个在太空漫步的人
There is no one to take care of the baby.没有人照顾这个孩子.
【2】动宾关系
I am looking for a room to live in.我正在找一间屋子住。
He needs something to eat.他需要点吃的东西.
I need a piece of paper to write on.我需要一张写字用的纸。
There is nothing to worry about.没什么可担心的。
He wants water to drink.他要喝水。
She has a child to take care of.她有一个孩子要照顾。
Are you going to the conference to be held next week?你准备参加下周举行的会议吗？
【3】动状关系
That's the way to do it.那样做才对。
I have no time to go there.我没有时间去那儿。
The place (for you) to stay is the university guest house.你住的地方是大学招待所。
【4】动补关系
The things (for you) to be these days is a system analyst.这些天你可以成为一名系统分析员。
【5】同位关系
Soon came the order to start the general attack. 很快下达了发起总攻的命令。
We got no instructions to leave the city. 我们没有接到离开这座城市的指示
We have made a plan to learn from Lei Feng.我们制定了一个向雷锋学习的计划
【6】描述关系
The effort to win the first prize is in vain.他获得一等奖努力白费了.
We have no need to go there by car.我们没有必要开车去那里。
