名词后用of表示所属关系是最常见的用法,但在某些特定的上下文中,主要是应一些名词的要求,必须用to来表示所属关系。

常见这类名词有：

key、answer、Monument、note、exit、entrances 、bridge、road、way、solution、visit

记忆口诀：

       钥匙答案纪念碑，注释索引和附录， 
　　出口入口桥与路，参观介绍多用to。

eg：the key to the bike自行车的钥匙，

        the key to success.

        the answer to the question问题的答案， 
              the Monument to the People's Heroes人民英雄纪念碑，

        the note to the text课文注释， 
              the exit to the cinema电影院出口， 
              the bridge to knowledge知识桥梁， 
              the way to the school去学校的路，

        the road to victory.

        pay a visit to the Great Wall参观长城

        the solution to the problem.

eg. Hard work is the key to success.

Only one student knew the answer to the question.

Mike thinks he has the key to success.

The coach said that the road to victory is through practice.

Who know the key to the room ?

They didn't get a solution to the problem .

All entrances to the city are guarded by armed men