定语从句介词用法
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[介词的选择]
在介词+关系代词中，介词的选择受以下限制：
（1）以从句中动词；形容词；名词与介词的固定搭配而定；
[高考考例]2. In the dark street, there wasn’t a single person _____ she could turn for help. [MET 1992]
A. that
B. who
C. from whom
D. to whom
[思路点拨]答案为D. turn to sb for help 为固定搭配表示“求助于某人”
（2）以先行词与从句中的动词关系及所表达的含义而定或以先行词在定语从句中的作用与含义而定。
[考例]1. The medicine of science, ______ progress has been very rapid lately, is perhaps the most important of all the science.
A. to which
B. in which
C. which
D. with which
[思路点拨]答案为B.从句主谓结构搭配为：progress has been rapid in, 这里的in意为“在某方面”，相当于rapid progress has been made in the science of medicine.
[考例]2. The professor made his first speech _____ he talked about some subjects the students were interested.
A. that
B. which
C. in which
D. of which
[小结]关键词：介词的选用与从句主谓结构的搭配有关。
[跟踪实练]
1. I don’t think the number of people ____ this happens is very large.
A. whom
B. to whom
C. on whom
D. which
2. The school has 3,000 students, _____ 1,800 are men.
A. whose
B. of whom
C. that
D. of which
3. Recently I bought an ancient Chinese vase, ______ was very reasonable.
A. which price
B. the price of which
C. its price
D. the price of whose
4. The gentleman ______ you told me yesterday proved to be a thief.
A. who
B. about whom
C. whom
D. with whom
5. She wrote a lot of stories for children, _____ this is one example.
A. in which
B. of which
C. among them
D. of them
6. He offered us a lot of money _____ we couldn’t buy these machines.
A. without which
B. with that
C. with which
D. without that
7. Mary, ____ for help, has gone to England.
A. who I can go to
B. whom I can go
C. to whom I can go
D. I can go to
8. Now we have very powerful telescopes _____ we can study the skies.
A. in which
B. with which
C. through which
D. by which
9. The man ______ she was married was a soldier.
A. whom
B. to whom
C. with whom
D. who
10. Tom, ____ I went to the concert, is a friend of mine.
A. whom
B. who
C. with whom
D. whose
答案为:1. B 2. B 3. B 4. B 5. B 6. A 7. C 8. C 9. B 10. C
常见的有以下几种情况:
1. where=in/on which 例:
This is the room where / in which he lives.这是他住的房间。
I can see the playground where / on which they do sports.我能看见他们进行运动的操场。
2. when= on/in/at which 例:
I still remember the year when/ in which I joined the Party.我仍然记得入党的那一年。
I still remember the day when/on which I joined the Party. 我仍然记得入党的那一天。
I still remember the hour when/at which the rocket was launched.我仍然记得那个火箭发射的