定语从句：当修饰名词的成分是一个句子，此句叫定语从句。
翻译下列句子:
1. 这是我昨天买的自行车. .
2. 他是我昨天遇见的男孩.
3. 你昨天给我买的书很有趣.
4. 这是我想要的钢笔.
5. 那是他正在照顾的小孩.
6. 正站在柜台后的女士是我妈妈.
7. 在桌子上的书是我的.
8. 这是我们买玩具的商店.
9. 这是帮助过我的男人.
10. 他是买这本书的男士.
将下列句子合二为一:
1. She is the girl. I served her yesterday.
2. This is the dress. She bought it last Monday.
3. She is in the woman. She looked for his son.
4. They are the man. They are working for the boss.
5. This is the computer. The computer cost me 5000 Yuan.
6. This is the house. I visited it last month.
7. He is the man. I spoke to you about him.
8. She is the student. I told you about her.
9. This is the ship. I traveled on it last year.
10. They are the people. They played in the garden.
单项选择 定语从句的用法
1.This is the bag _____ my mother bought yesterday.
A. that B. who C. whom D. this
2. The man _____ lives next to us is my English teacher.
A. who B. which C. who D. /
6. The only language _____ is easy to learn is the mother tongue.
A. which B. that C. / D. it
7. The girl handed everything _____ she had picked up in the street to the police.
A. which B. in which C. that D. all
8. _____ cleans the blackboard should be praised.
A. That B. Who C. The one who D. The students who
9. Please show me the book _____ you bought yesterday.
A. which B. whom C. whose D. this
10. This is the best book _ I have been looking for all this year.
A. who B. whom C. which D. /
11. This is the only article of these that _____ written by him.
A. was B. were C. is D. are
12. The man _____ was here just now is a doctor.
A. whom B. who C. / D. he
13. The boy _____ has two lovely dogs.
A. who live next door B. which lives next door
C. whom lives next door D. that lives next door
14. Those _____ made no mistakes in today’s exercises please raise your hands.
A. which B. whom C. that D. who
15. Don’t go in, this is the shop _____ we have just been _____.
A. /, to B. that, / C. where, to D. which, there
16. He is the most careful boy _____ I know.
A. what B. which C. as D. ./
17. This is the school _____ Mr. Smith once taught.
A. in that B. when C. where D. there
18. Have you visited the house _____ the famous scientist was born?
A. where B. in that C. that D. which
翻译下列句子：
1. 正在跑步的男孩是我的好朋友。
2. 他是我们正在寻找的男孩。
3. 昨天给我们上课的妇女是他的'姑姑。
4. 她是我们昨天帮助的女孩。
5. 正在打扫校车的女孩是我们的班长。
6. 他是我所见到最高的学生。
7. 这是我去年买的手表。
8. 他是刚才唱歌的男孩。
9. 正在游泳的女孩是我们的同学。
10. 他是在医院里帮助过我的医生。
拓展内容：定语从句习题
请看下面一道题：
The letter they were looking forward to _________ at last.
A. arrived B. arriving C. had arrived D. arrive
对于此题，基础稍差的同学可能选D，认为空格前的 to 是不定式符号，所以后接动词原形；基础稍好的同学可能会选B，知道 look forward to 是短语，意为 look forward to “盼望”，其中的 to 是介词，而不是不定式符号，所以后接动名词；只有基础扎实、语感好、而且细心的同学才会选A，诚如上面所说，look forward to 中的 to 是介词，而不是不定式符号，所以后接动词作宾语时，要用动名词，而不用动词原形。但问题是此句中的动词 arrive 不是介词 to 的宾语，而是句子的谓语。句子的正解分析是：the letter 为句子主语，they were looking forward to 是修饰主语的定语从句(介词 to 的宾语是引导该定语从句的关系代词 that，被省略)，arrived 是句子谓语。
请看以下试题：
(1) The professor you referred to _________ just now.
A. comes B. come C. coming D. came
答案选D，句子主语为 the professor，you referred to 为修饰 the professor 的定语从句，空白处填 came，为句子谓语。
(2) The theory he sticks to _________ to be of no use in our studies.
A. proves B. prove C. proving D. be proved 答案选A，he sticks to 是修饰主语 the theory 的定语从句，句子的基本结构为 The theory proves to be of no use in our studies.
(3) The work he devoted his time to _________ worth praising.
A. wasB. be C. being D. been
答案选A，he devoted his time to 是修饰主语 the work 的定语从句。句子的基本结构为 The work was worth praising.