7.介詞+關(guān)系代詞

　　★該結(jié)構(gòu)的關(guān)系代詞只有兩種即 介詞+which（指物） 介詞+whom（指人）

　　★該結(jié)構(gòu)介詞的選用原則：

　　(1)根據(jù)定語(yǔ)從句中謂語(yǔ)動(dòng)詞的習(xí)慣搭配

　　This is the book on which I spent $ 8.

　　This is the book for which I paid $ 8.

　　(2)根據(jù)先行詞的搭配習(xí)慣

　　I remember the days during which I lived there.

　　I remember the day on which I graduated from university.

　　(3)根據(jù)整個(gè)句子所表達(dá)的意思來(lái)決定

　　The colorless gas without which we can’t live is called oxygen.

　　(4)英語(yǔ)中為了強(qiáng)調(diào)某一名詞，不定式前面也可以加上關(guān)系代詞

　　Here is the money with which to buy the piano.

　　She is the right person on whom to depend

　　注意：

　　①如果介詞后移，關(guān)系代詞可以省略

　　The person (whom/who/that) you will write to is Todd.

　�、谟行┖�有介詞的動(dòng)詞短語(yǔ)介詞不能提前如look for/after; take care of; send for; hear from/of/about deal with等

　　This is the baby that you will look after.
 

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