[新知导引]
在空格处填入适当的关系代词或关系副词
1．(教材原句P1)This gift was the Amber Room, which was given this name because several tons of amber were used to make it.
2．(教材原句P1)The amber which was selected had a beautiful yellowbrown colour like honey.
3．(教材原句P1)It was also a treasure decorated with gold and jewels, which took the country's best artists about ten years to make.
4．(教材原句P1)However, the next King of Prussia, Frederick William Ⅰ， to whom the amber room belonged, decided not to keep it.
5．(教材原句P2)Later, Catherine Ⅱ had the Amber Room moved to a palace outside St Petersburg where she spent her summers.
6．(教材原句P2)This was a time when the two countries were at war.
7．(教材原句P5)A fact is anything that can be proved.
8．(教材原句P7)I think highly of those who are searching for the Amber Room.
[共性呈现]
1．例句(1)(3)中含which引导的非限制性定语从句；例句(2)中含which引导的限制性定语从句；在形式上非限制性定语从句与限制性定语从句的区别在于：关系词前是否有逗号。
2．以上例句中含非限制性定语从句的有(1)(3)(4)；含限制性定语从句的有(2)(5)(6)(7)(8)。
[语法精释]
一、定语从句的种类
根据定语从句与先行词之间关系的紧密程度，我们将定语从句分为限制性定语从句和非限制性定语从句两种。
1．限制性定语从句
限制性定语从句是先行词在意义上不可缺少的定语，用于修饰和限定先行词。如果去掉，主句的意思就不完整。这种从句和主句的关系十分密切，两者之间不用逗号分开；关系代词在从句中作宾语时可以省略。引导限制性定语从句的关系代词有who, whom, whose, that, which, as；关系副词有where, when, why。
This is the computer (that/which) he bought for his son yesterday.
这是他昨天为儿子买的电脑。
The woman who/that survived the earthquake is Amy's English teacher.
在地震中幸存的那个女人是埃米的英语老师。
I live next door to a couple whose children often make a lot of noise.
我住在一对夫妇的隔壁， 他们的孩子经常吵闹。
2．非限制性定语从句
非限制性定语从句和主句的关系不是十分密切，只是对先行词或主句作些附加说明，如果去掉，主句的意思仍然完整。这种从句和主句之间往往用逗号分开。引导非限制性定语从句的关系词与引导限制性定语从句的关系词略有不同。除that和why不能引导非限制性定语从句外，其他都可以。
He is English, which I know from his accent.
他是英国人，那是我通过他的口音知道的。
I heard a terrible noise, which brought my heart into my mouth.
我听到了一个可怕的声音，这使我非常害怕。
[即时演练1] 用适当的关系词填空
(1)Holly, who is from Australia, has a good command of Chinese.
(2)She and her family bicycle to work, which helps them keep fit.
(3)His parents wouldn't marry her to anyone whose family was poor.
(4)Mr. Green said that Suzhou was the first city that he had visited in China.
(5)This was the reason why he took apart the machine.
