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(共19张PPT)
Period 2 Using language
定语从句（3） “介词+关系代词”引导的定语从句
一、 关系代词的确定
“介词+关系代词”既可以引导限制性定语从句，也可以引导非限制性定语从句。在此结构中，先行词指人时关系代词用whom，不可以用who或that；先行词指物时关系代词用which，不可以用that。但如果介词后置，则不受这种限制，限制性定语从句中的关系代词还可以省去，尤其是在口语中。
二、介词的选取
（3）The Amazon River, from which the rainforest gets its name, is close to 6，400 kilometres in length—roughly 100 kilometres longer than the Yangtze River.
亚马孙河是这片热带雨林名字的由来，全长约6 400千米——约比长江长100千米。
1.“介词+关系代词”中介词的选取主要看以下三方面：
（1）根据定语从句修饰先行词的习惯来确定介词；
（2）根据定语从句中某些词或短语的习惯搭配来确定介词；
（3）根据上下文要表达的具体意思来确定介词。
2.当定语从句中的动词短语含有不可拆分的介词时，该介词不能放在关系代词前面。常见的这类动词短语有look at、 look into、 listen to、 hear from、 look after、 break into等。
三、“介词+关系代词”的特殊用法
（4）Look at the building, the roof of which（= whose roof） is white.
看那座建筑, 它的屋顶是白色的。
（5）There are two buildings, the larger of which stands nearly a hundred feet high.
这里有两座建筑物，较大的那座几乎有100英尺高。
1.the way作先行词，后接定语从句时，若关系词在从句中作状语，则用in which/that，可省略。
2.“代词（all/each/one/many/much/some/none/both）/数词+of+which/whom”通常在定语从句中作主语，说明整体中的一部分。
3.“介词+which”在定语从句中，可作时间、地点和原因状语，代替相应的关系副词when、where和why。
4.“the+名词+of+which/whom”引导定语从句时,of which/whom充当定语，修饰前面的名词，整个结构相当于“whose+名词”引导的定语从句。
5.“the+形容词比较级/最高级+of+which/whom”引导非限制性定语从句。
Ⅰ.单句语法填空
1.（2023·新高考全国卷Ⅰ）So，why did he suddenly force me to do something at _______ I was sure to fail
2.The factory produces half a million pairs of shoes every year, 60% of _______ are sold abroad.
3.Many young people, most of _______ are volunteers, have taken part in the activities to support the Olympics.
which
which
whom
4.There are many good websites on _______ you can check out the latest information, including news, entertainment, technology, and more.
which
5.The historic building is as much part of our culture as traditional Chinese paintings, ___ which we always take great pride.
6.The newly-built library, the walls of _______ are painted light green，is really a peaceful place for us.
7.Would you be kind enough to help the boy ____ whom Chinese is really hard to learn
8.Wind power is an ancient source of energy ___ which we may return in the near future.
in
which
for
to
9.My father is the first person to _______ I will turn for help when I meet difficulties.
10.She is looking forward to the day on _______ her daughter will win the gold medal in the Olympics.
whom
which
Ⅱ.语法与写作（用“介词+关系代词”引导的定语从句合并下列句子）
1.He is a man of great experience. Much can be learned from him.
→_________________________________________________________________
He is a man of great experience, from whom much can be learned.
2.I joined the voluntary organization on that day. I will never forget the day.
→______________________________________________________________________
I will never forget the day on which I joined the voluntary organization.
3.I have bought two books recently. Neither of them interests my brother.
→_________________________________________________________________
I have bought two books recently, neither of which interests my brother.
4.I would like to thank my English teacher. I would have never passed the college entrance examination without her.
→_________________________________________________________________________________________________________
I would like to thank my English teacher, without whom I would have never passed the college entrance examination.
5.In the Chinese class, our teacher often creates an environment. We are given the opportunity to solve problems by ourselves in the environment.
→______________________________________________________________________________________________________________________
In the Chinese class, our teacher often creates an environment in which we are given the opportunity to solve problems by ourselves.

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