每周一練：定語從句（三）

    "介詞+關系代詞"引導的定語從句，是定語從句一種介詞前置的定語從句句型，介詞與關系代詞之間存在一種介賓關系。當關系代詞在定語從句中作介詞賓語時，把介詞置于關系代詞前，即演變出"介詞+關系代詞"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、基本構成

　　1."介詞+關系代詞"結構引導的定語從句中，關系代詞只能用which（指物）或whom(指人) ，即：介詞+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：當介詞放在關系代詞的前面時，用在介詞后的關系代詞不能省略。

　　2.在限制性定語從句中，當介詞置于定語從句的謂語動詞之后時，可用that/which(指物)；that/who/whom（指人）作介詞的賓語.且此處關系代詞可以省略，特別是在口語中。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：通常介詞放在定語從句中動詞后，也可以放在關系代詞前面，但有些特殊動詞短語搭配不能拆分，介詞只能放在動詞后，如： look for, look after, pay attention to ,take care of , look forward to, listen to等。

　　1）This is the pen that / which you are looking for.

　　2）The patient whom she is looking after is her father.

　　3）The words that /which we should pay attention to are written on the blackboard.

　　4）There are fifty patients who/whom/that we must take good care of.

二、關系副詞when，where，why可用"介詞＋which"來代替。關系副詞實際上是介詞＋先行詞。

　　其中

　　when=表時間的介詞（如：in，at,during等）+which；

　　Where=表地點的介詞（如：in，at,on,under等）+which；

　　Why=表原因的介詞（如：for）+which

　　1．當先行詞表示時間，定語從句中缺少時間狀語時，通常用關系副詞when引導，此時也可選用表示時間的介詞＋which來代替關系副詞when。

　　I still remember the day when I came here.    ( on the day =when)   

　　2．當先行詞表示地點，定語從句中缺少地點狀語時，通常用關系副詞where引導，此時也可選用表示地點的介詞＋which來代替關系副詞where。

　　This is the house where I lived last year.       ( in the house= where)

　　3．當先行詞為reason，定語從句中缺少表示原因狀語時，通常用關系副詞why引導，此時也可以用for which來代替關系副詞why。

　  There are many reasons why people like traveling.(for the reasons=why)

三、關系代詞前介詞選擇三原則：一先，二動，三意義（重中之重）

　　1. 一先，即根據(jù)定語從句中介詞與先行詞的搭配關系選擇。

　　    I never forget the day on which I came to this school. (on the day)

　　2. 二動，即根據(jù)定語從句中謂語動詞與介詞的搭配關系選擇。

　　    This is the iPad on which I spent 3000 yuan.   (spend money on sth.)

　　3. 三意義，即根據(jù)定語從句的意義來確定介詞。

　　    This is my pair of glasses, __without which__I cannot see clearly.

　　注意：介詞+關系代詞

　　　　1）介詞后面的關系代詞不能省略。

　　　　2）that前不能有介詞。

　　3) 某些在從句中充當時間，地點或原因狀語的"介詞+關系詞"結構可以同關系副詞when,where和why互換。

　　四、綜合練習

　 （一）根據(jù)句子意思，在第一個空白處填入介詞，在第二個填入關系代詞whom或which:

　　1. The person ________ ________ I spoke just now is the manager that I told you about.

　　2. The pencil ________ ________ he was writing broke.

　　3. Wu Dong, ________ ________ I went to the concert, enjoyed it very much.

　　4. The two things _______ _______ Marx was not sure were the grammar and some of the idioms of English.

　　5. Her bag, ________ ________ she put all her books, has not been found.

　 （二）用適當?shù)慕樵~填空

　　1. The pencil ________ which he wrote was broken.

　　2. He built a telescope ________ which he could study the skies.

　　3. The woman, ________ whom I learned the news, is a nurse.

　　4. The wolf ________ which the sheep was killed was shot.

　　5. She has three children, all _______ whom are at school.

　　6. There is a tall tree outside, ________ which stands our teacher.

　　7. My glasses, _______ which I was like a blind man, fell to the ground and broke.

　　8. In the dark street, there wasn't a person ________ whom she could turn for help.

　　9. I was surprised at the way ________ which he treated the old man.

　　10. The age _______ which children can go to school is seven.

　　11. His bike ________ which he went to work was stolen last night.

　　12. Do you know the building ________ which is flying a red flag?

　　13. Ours is a beautiful school, ________ which we are proud.

　　14. The desk ________ which Jack is leaning is John's.

　　15. He bought a book yesterday, the author ________ which is a teacher.

　 （三）改錯

　　1. Is this hospital that they want to visit next week?

　　2. Is this the museum the one some German friends visited the other day?

　　3. He has two sons, each of them looks like him.

　　4. He will never forget the days when he spent with the villagers.

　　5. Please tell us about the people and interesting things which you have seen in America.

　　6. The knife which she often uses it to cut the bread is very sharp.

　　7. Please pass me the book that cover is red.

　　8. The sun heats the earth, that is very important.

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