同学你好，该知识点来自沪江网校《英语零基础直达大学四级【抢学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好，
一般来说 to 有两种基本用法：
1.做介词，表示“到，向，往”，如go to，fly to，后面跟名词作定语，构成介宾结构。
2.动词不定式的标志，很常见的，如：want to do，be happy to do。
注意有一些看似不定式但实为介词的结构，如 look forward to，pay attention to，后面跟动词的ing 形式作宾语，不能跟原形，属于固定搭配。
其他的如to +do 作定语等等基本都是以上两种用法的延伸。

而to的用法重点主要是作介词，下面讲解to作为介词的用法：
一：表示相对，针对
be strange (common, new, familiar, peculiar, distinct, sensitive,immune, vulnerable, indispensable) to
Air is indispensable to life.
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
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
4: to也偶尔出现在个别动词之后,与动词形成固定词组,表示比较,如:prefer to, compare to, in contrast to
compare to sth.表示比喻或比拟,而compare with sth.表示比较,如:
World is usually compared to a stage
Compared with his past,he has changed a lot.
Prefer的正确句型是:prefer A to B或prefer doing A to doing B,但当prefer后接动词不定式时,表示比较的介
词to就要改成rather than ,如:
The undaunted soldier preferred death to surrender.
5: to与及个别的名词构成比较之意,如:alternative
Going to an under water concert is a great alternative to going to dinner.
三: 表示修饰关系
1: 表示回复,反应意思的词,如:answer to question,
solution to problem,response to inquiry,reaction to proposal,reply to letter
2: 表示建筑构件的词汇,如: entry,entrance,approach,access,passage,exit,vent,path
3: 表示人物职位和官衔的词, 如:assistant to manager, ambassador to Spain, successor to tradition,heir to
throne,deputy to the National People’s Congress
4: 表示权利和许可的词汇,如:right,admission
5: 表示栅栏或障碍的词汇,如:bars to development,the barrier to progress
6: 表示与书籍,文本相关的词,如:introduction to passage.
7: 表示恭喜或是祝贺,如:
The director proposed a toast to the health of the guests.
8: 另外还有一些名词符合这种用法,有的具有两者息息相关,缺一不可的含义.如:key todoor,invitation to party,
四: to还具有依据,伴随,和着节奏的含义,
如:sing to piano, chance to the tune, stamp to the rhythm of the song, add salt to taste
五: 表示趋势或倾向, 如:tend to,be prone to,be inclined to,be apt to,be liable to
He’s liable to seasickness.
六: 表示对事情的坚持与执着,
如:sick to,hold o,adhere to,cling to
He still holds on to his original views.
七: 表示约束,局限,
如:limit to,confine to, restrict to
He’s confined to the house by illness.
八: 表示一种习惯或是一种适应性,
如:get (be) to,used to,be accustomed to
Finally,the students got used to my teaching method.
九: 表示起因和原由,
如wing to,due to,thanks to,attribute to,come down to
The flight was cancelled due to the thick fog.
十: 表示目的或结果,
如:aim to,lead to,give rise to
I aim to be an excellent college teacher.
十一: 表示命运,注定,
如:be doomed to,be destined to,
All military adventures by the two super powers are doomed to fail.
十二: 表示数量上的积累或增加,
如:in addition to,add to,amount to
In addition to relief supplies,he also presented with some money.
The annual output of steel amounts to 1200 tons.
十三: 表示全身心投入的含义,
如:be addicted to,contribute to,devote to,commit to
He is determined to devote all his life to his.
十四: 表示展望或是回顾,
如:look forward to
十五: 表示方位概念.
如:close to,next to
I don’t like wool next to my skin.
十六: 表示依靠或借助,
如:resort to,turn to,appeal to,
He usually appeals to arms to settle the territory dispute.
十七: 表示有关注,关于: as to,with regard to
十八: 表示关注或重视,如:pay attention to,attach to,
We should attach primary importance to job training.
十九: 表示依据或是根据,如:according to,in proportion to
According to today’s newspaper,the match will be postponed.
The lending countries subscribe towards capital stock in proportion to heir economic importance.
二十: 表示应该或必须含义的句式, 如:
It’s time to get up.

to是很常见的介词，与其搭配的固定短语非常多，同学需要多积累哈~

祝进步~