关于TO的一些问题

这里的to是助动词，不是介词，助动词后面接的是动词原型
可以看看http://www.baidu.com/s?ie=gb2312&bs=advertisement&sr=&z=&cl=3&f=8&wd=to&ct=1048576
一：表示相对，针对

be strange (common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable) to

Air is indispensable to life.

Aircrafts are vulnerable to interference caused by radiation.

This injection will make you immune to infection.

二：表示对比，比较

1：以-ior结尾的形容词，后接介词to表示比较，如：superior ,inferior,prior,senior,junior

The quarrel happened prior to my arrival.

2: 一些本身就含有比较或比拟意思的形容词，如equal，similar，equivalent，analogous

A is similar to B in many ways.

3：表示一些先后顺序的形容词，如：second,subsequent,next,preliminary,preparatory

Subsequent to the war,they returned to their hometown.

4: to也偶尔