定语从句:修饰一个名词或代词的从句，用来给出更多的信息或限定名词的范围。下面是定语从句的一些常见语法归纳：(答案见下期)
一. 关系词：定语从句引导词主要有关系代词和关系副词两类。
关系代词有：who, whom, whose, which, that；关系副词有：where, when, why。
二. 关系代词的用法：
- who用于指人，作主语或宾语。
- whom用于指人，作宾语，常常放在介词后面。
- whose用于指人或物，表示所有关系。”...的“
- which用于指物，作主语或宾语。
- that既可以指人也可以指物，作主语或宾语。
关系代词的练习句子：
（1）. The man _____ helped me yesterday is my neighbor.
A. who B. whom C. whose D. which
(2). Is there anyone _____ you can trust in this city?
A. who B. whom C. whose D. which
(3). The book _____ I borrowed from the library is very interesting.
A. who B. whom C. whose D. which
三 . 关系副词的用法：
- where用于指地点。- when用于指时间。- why用于指原因。
关系副词的练习句子：
(1). Do you remember the restaurant _____ we had dinner last night?
A. where B. when C. why D. which
(2). This is the day _____ we've been waiting for.
A. where B. when C. why D. which
(3）. I can't understand the reason _____ she left without saying goodbye.
A. where B. when C. why D. which
四. 非限制性定语从句：用逗号将其与主句分开，修饰的是整个主句的内容，不是必需的信息。
(1),定语从句修饰物 只能用which 不能用that 修饰人用who
有“，”（非限制定语从句）
介词+which（人用whom）
(2),定语从句修饰物 只能用that 不能用which
a.先行词有the only/same/very/last等限定词修饰
b.先行词是序数词，adj的最高级或被其修饰时
c.先行词是不定代词或被其修饰时（much，all，nothing，something，everything
d.主句以there，here开头时
Tom was late, ________ surprised me.(that/which)
Jane tore up my photo, _________upset me. (that/which)
Tell me all things _______ you know. (that/which)
The only thing _______we should do is to find our way home. (that/which)
五其他(常用固定句型）
1.There was a time when... 曾经一度，有一段时间
There was a time when he was disappointed and wanted to leave.曾经一度他很失望，想离开这里。
2. The reason why...is(was) that... .....的原因是......
The reason why he didn't come was that he was ill.他没来的原因是他病了。
3. As is known to all, china is a large country with a long history. 众所周知，中国是一个历史悠久的大国。
As the old saying goes ,正如谚语所说；as is reported正如所报道的；as it mentioned before正如上述所提到的
As often happens正如经常发生的；as sb said正如某人所说；as we all can see正如我们都看到的那样（有目共睹）
练习一.介词+关系代词（定语从句）
1.Here are the questions, some of_________I thought too difficult for you.
2.Here are the questions, and some of_________I thought too difficult for you.
3.Last Sunday I bought some books from the physical bookstore, three of _____ were English novels.
4.He has four daughters, the tallest of_______is Lily.
5. There was a time_______books were the main source of information and entertainment.
6.Our school will hold an activity,_______ is themed Green Life.
7.Our school held an activity，________we gained a lot experience.
8.Our school held an activity, through _______not only did we learn a lot about Chinese culture, but also we made new friends.
练习二.下列各题中的两个简单句合并为一个主从复合句，用第二个句子做定语。
1 The girl is happy. She has won the race.
2. The student is from America. He sits next to me.
3. The boy was not badly hurt. The boy fell from a tree.
4.Jack was fired from his job. That surprised all his co-workers.
5. Monday is the day. We will come on that day.
6. The city was beautiful. We spent our vacation there.
7. The town is small. I grew up there.
8. This is the house. They put their tools in it.
练习三. 翻译句子
1.你昨天借给我的那本书很有趣。
2.告诉我今天早晨你迟到的原因。
3. 众所周知，保护环境很重要。
4. 曾经一度我和同桌相处得很好。
5. 曾经有一段时间我痴迷于电脑游戏。
6. 他考试不及格的原因是他不努力.
7. 他成为冠军的原因是他训练地非常努力。
8. 正如谚语所说，有志者事竟成。
9. 正如我们所预料的，他在工作中取得了巨大的进步。
10. 众所周知，魏县以鸭梨出名。
