Unit 1 People of Achievement Discovering Useful structures课件(共13张PPT)-2025-2026学年人教版（2019）选择性必修第一册

(共13张PPT)
Unit 1
People of Achievement
Discovering Useful structures
The pig, , will be killed.
descriptive information
If we remove the red part, is the sentence still clear
which is big
Yes, because we have only 1 pig. The red part offers only ____________________ of the subject.
descriptive information
Lead in
1
The pig will be killed.
necessary information
If we remove the red part, is the sentence still clear
which is the biggest
No, because we have only 3 pigs. The red part is to point out which pig to be killed.
2
3
The red part can _________________ and _____________ ________. It offers ___________________ of the subject.
Lead in
narrow things down
have a limiting
function
necessary information
The pig, which is big, will be killed.
restrictive A.C.
限定性定语从句
non-restrictive A.C.
非限定性定语从句
descriptive information
necessary information
The pig which is the biggest will be killed.
1
2
3
Lead in
限制性定语从句 非限制性定语从句
从句与先行词关系紧密，修饰限定先行词，不可或缺 从句对先行词或整个句子起补充说明、解释，评论等作用
只能修饰先行词，不修饰整个主句 即可修饰先行词，又可修饰整个主句
可用关系代词和关系副词 可用关系代词和关系副词，不能用that引导从句
从句前一般不用逗号隔开 从句和先行词或主句之间一般用逗号隔开
总
结
<<<
关系词 所指 所作成分
关系代词 who 指人 主语
whom 指人 宾语(不能省略，不能用who替代)
which 指代名词、代词、整个句子或主句的一部分 主语/宾语等
whose 指人或指物 定语
关系副词 where 通常是地点名词 地点状语
when 时间名词 时间状语
This year’s Nobel Prize for Physiology or Medicine has been awarded to Tu Youyou (co-winner), ____ research led to the discovery of artemisinin, a crucial new treatment for malaria.
Practice
whose
But Sarah, ______ has taken part in shows along with top models, wants to prove that she has brains as well as beauty.
who
Peter, ______ you met in London, is now back in Paris.
whom
We were very impressed by the old man. He was not willing to acknowledge defeat.
We were very impressed by the old man, _________was not willing to acknowledge defeat.
who
Some people always talk loudly in public, ______________is really annoying.
which
Many people ,most of _________were well-educated, headed for remote regions to chase their dreams.
whom
as和which引导的非限制性定语从句的区别
As we all know，he studies very hard.
我们都知道他学习很用功。
The student，as was expected，achieved great success.
正如所期盼的，这位学生取得了巨大成功。
He is late for class again，as is often the case.
他上课又迟到了，情况经常如此。
I want to buy the house，which has a garden.
我想买这座房子，它带有一个花园。
He was late for the meeting，which made the chairman very angry.
他开会迟到了，主席为此非常生气。
总
结
<<<
as which
指代 所引导的定语从句只能指代整个句子的内容 所引导的定语从句既可指代名词、代词，又可指代整个主句的内容，也可指代主句的一部分
位置 所引导的定语从句可位于主句之前、之中或之后 所引导的定语从句只能位于主句之中或之后
意义 正如，正像 这一点，这件事
特别提醒
as引导非限制性定语从句时常用于以下结构：
as we all know/as is known to all 众所周知，as is often the case 情况常常如此，as is hoped正如所希望的那样，as was expected/as we had expected正如所预料的那样，as has been stated above如上所述，as is mentioned正如所提及的。
The president of the World Bank says he has a passion for China, ___________he remembers starting as early as his childhood.
which
___________ is well known, China is a country with a long history.
As
It is known to us that Taiwan is part of China.
→____________________________, Taiwan is part of China.
As is known to us
He failed in the exam. It made his parents very angry.
→He failed in the exam, ____________________________
which made his parents very angry.