970797游戏攻略网介词的选择是根据从句的动词决定的，不及物动词后要跟介词
①of which相当于定语whose，后加名词，相当于是一个形容词。
eg：There are many books in the shelf, of which/whose covers are old.
书架上有许多封面陈旧的书。
②，in which相当于疑问词where，是对地点名词的修饰。
如：The book （in which/where there are many stories） in his.
这本有许多故事的书是他的
③on which相当于特殊疑问词when，是对时间的修饰。
如：I will never forget the best time when/on which we enjoyed ourselves.
④，for which相当于疑问词why，是对原因的修饰。
如：I don't the reason why/for which he was late.
我不知道他迟到的原因
⑤at which相当于疑问词how，是对方式名词的修饰
介词➕which/whom引导的定语从句+长难句打卡Day1
“介词+关系代词”引导的定语从句，是定语从句一种介词前置的定语从句句型，介词与关系代词之间存在一种介宾关系。当关系代词在定语从句中作介词宾语时，把介词置于关系代词前，即演变出“介词+关系代词”句型。
例如：
The man who/whom /that you spoke to is a teacher.
=The man to whom you spoke is a teacher.
一、基本构成
1.“介词+关系代词”结构引导的定语从句中，关系代词只能用which（指物）或whom(指人) ，即：介词+which/whom。
（1）The man to whom you spoke is a teacher.
（2）The city in which she lives is far away.
（3）The little girl is reading a book, in which there are many cartoons.
注意：当介词放在关系代词的前面时，用在介词后的关系代词不能省略。
2.在限制性定语从句中，当介词置于定语从句的谓语动词之后时，可用that/which(指物)；that/who/whom（指人）作介词的宾语.且此处关系代词可以省略，特别是在口语中。如：
（1) The man (who/whom /that )you spoke to is a teacher.
（2）The city（which/that）she lives in is far away.
注：通常介词放在定语从句中动词后，也可以放在关系代词前面，但有些特殊动词短语搭配不能拆分，介词只能放在动词后，如： look for, look after, pay attention to ,take care of , look forward to, listen to等。
This is the pen that / which you are looking for.
The patient whom she is looking after is her father.
The words that /which we should pay attention to are written on the blackboard.
There are fifty patients who/whom/that we must take good care of.