(共48张PPT)
Unit 4 Natural disasters
Period 3 Discovering Useful Structure
Lead in
Do you know who is he?
He is Han haolin
He plays the role of little Fanxian.
He is Han haolin, who plays the role of little Fanxian.
在句中修饰名词或代词的成分叫定语。
They are talking about a maths problem.
It is very near from here to his school.
The man upstairs is a professor of Shandong
University.
The picture on the wall was drawn by my daughter.
Let’s review
What is attribute
1.The volcano in this place erupted suddenly.
erupt:
New words
[? 'r?pt]
eruption n
2.The government supplied plentiful supplies to this area.
Supply
[s?'pla?]
Supply and demand
供求关系
provide sth to sb
supply sb with sth
supply sth to sb.
offer sb, sth
offer sth to sb
(2018·浙江) Caffeine， a chemical typically found in coffee, has caused a lot of concern because it is one of the few drugs that show up regularly in our_____________。
提供某人某物
food supply
supply
offer
provide
猜一猜！看谁反应快!
Let’s play
Let’s play
1.Scientists say Mount Pinatubo could________??again soon.
(eruption)
2.The school provided food __________the students.
3.The cars will be supplied_________ people all over the country.
4.She offered me to a cup of tea.
5.They provided us _______all the books we need
erupt
for
to
with
Let’s learn
01
关系代词引导的定从
He is Han haolin, who plays the role of little Fanxian.
先行词
定语从句
关系代词
Let’s learn
定语从句定义：在从句中修饰某一名词代词的从句。
定语从句的定义
先行词
关系词
定语从句
+
+
定语从句的构成
指代先行词
连接主句和从句
在从句中充当成分
定语从句的关系代词
人、物
主语、宾语
宾语
人、物
定语
that
which
Who
Whom
whose
as
Show time
关系代词 先行词 在句子所做的成分
主语、宾语、表语
物
人 主语、宾语
人
人、物
主语、宾语表语
The number of people _________ come to visit this city each year reaches one million.
关系代词的用法。
1.that既可指人也可指物，在定语从句中可作主语、宾语
或表语，作宾语时可省略。
(指人，作主语)
that
This is the suitcase _________ she is looking for.
( that )
定语从句的关系代词
2 which指物，在定语从句中可作主语或宾语，作宾语时可省略。
They ignored the details _________ might account for the accident.
他们忽略了那些或许可以解释事故发生原因的细节。
which
(作主语)
定语从句的关系代词
3.who指人，在定语从句中可作主语或宾语，作宾语时可
省略。
Ye are concerned about people ___________have suffered a lot in the earthquake.
Danny was the man __________we rescued from the ruins.
who
(作主语)
(作宾语)
who
4.whom指人，在定语从句中作宾语，可省略，也可用who代替。
Rose is the person _______________you should care about.罗丝是你应该关心的人。
5. whose既可指人也可指物，表“所属”关系，在定语从句中作定语。
I know the person____________ house was totally destroyed in the earthquake.我认识那个人，他的房子在地震中被彻底推毁了。
(who/whom)
(作宾语)
whose
(作定语)
①关系代词指代先行词在定语从句中充当主语、宾语、表语或定语，因此定语从句中不能再出现关亲代词所替代的名词或代词。
昨天晚上我们看的两部电影非常吓人
The film that /which we saw it last night was very frightening.
The film (that /which) we saw last night was very frightening.
误区警示
②关亲代词在从句中作主语时不能省略，作宾语时可以
省略。
Is that the girl__________________ you spoke of the other day.
那就是你前几天所提的女孩吗?
(whom /who/that ）
定语从句的关系代词
宜用that就不宜用 which引导定语从句的情况
1.当先行词被序数词或形容词最高级修饰时。
The first thing _____you should do is call the police right away.
This is the most delicious food ___________ I have ever had.
2.当先行词是all，any，little，few， much， ever
anything, nothing，none等不定代词或被这些词修饰时。
All ________can be done has been done.
Tell me everything ________ you know
Please send us any information _______you have about the subject.
that
that
that
that
that
用that就不宜用 which的情况
3.当先行词被由 the only， the very， the last， the same等修饰时。
The only thing _______________ she could do was to go to the Police for help.
This is the very book _________I want to buy.
4.当先行词既包括人又包括物时。
Sometimes we should ignore the persons and things __________upset us.
宜用that就不宜用 which引导定语从句的情况
用that就不宜用 which的情况
that
that
that
5.当主句是以who或者 which开头的特殊疑问句时。
Which of the books _________ you bought is the most useful for my writing?
你买的书中哪一本对我的写作最有用?
、宜用that就不宜用 which引导定语从句的情况
that
用that就不宜用 which的情况
宜用 which不宜用that引导定语从句的情况
1.引导非限制性定语从句时。
Football, ___________is an interesting game, is very popular all over the world
足球是一项有趣的运动，在全世界非常受欢迎。
2.当关系代词前有介词时。
This is the house in _________ Mo Yan once lived
这就是莫言曾经住过的房子。
which
which
1.关系代词在从句中作主语时，定语从句谓语动词的形式根据_________的形式确定.
The old town has narrow streets and small houses that______ built close to each other.
旧城区的街道狭窄，房子小，彼此挨得很近
I'm fond of that Piece of music which _______popular with the teenage.
我喜欢在青少年中流行的那支曲子。
先行词
are
is
One of+复数名词+定语从句(复数谓语)
the only one of+复数名词+定语从句(单数谓语)
2
He is one of the students who________ a good command of French.他是精通法语的学生之ー。( the students为先行词)
He is the only one of the students who___________ a good command of French.他是学生中唯一精通法语的。( the only one为 先行词)
have
has
has
1.as既可指人也可指物。在定语从句中可作主语、宾语或表语。
它常用在 the same…as，such，as.等结构中as不能省略。
Such reasons _____we give can persuade him to give up his foolish
plan.
I'll buy the same dictionary__________ you have.
关系代词as引导的定语从句
as
as
1.当光行词被 the same修饰时，也可用that引导定语从向
但指同一物，而不是同一类。
This is the same bike___________ l lost two months ago
这就是两个月前我丢的一辆自行车。
This is the same bike __________l lost two months ago
这辆自行跟两个月前我去的那辆一样。
误区警示
that
as
(同一辆自行轩)
(同样的自行车，但不是同一辆)
2 as引导非限制性定语从句，代替整个主句的内容。从句可放在主句前、主句后或主句中间。
As you know, she is a stubborn girl, and I can’t persuade her to change her mind.
My grandfather is fond of talking about the good old days,____ is often the case with old people
as
as引导非限制性定语从句常用的固定表达：
as we all know
as is well known
as you see
As we expect
as often happens
as I can remember
as has been said before
ass/ was expected
as can be seen
as is often the case
众所周知
众所周知
如你所见
正如我们预料的那样
正如经常发生的那样
正如我所记得的
如前所述
正如预料的那样
正如所见
情况常常是这样
Let’s do
drills
1)The Tangshan earthquake is a terrible experience that my grandma cannot forget.
2)The couple who live next to us volunteered to help after the volcano erupted.
3)The supplies which were provided to the disaster area were collected from around the country.
1.Find and underline the restrictive relative clauses in the sentences
below What function do the restrictive relative clauses have?
4)A doctor with whom James used to work died in the 2016 earthquake in Ecuador.
2.Find more sentences with restrictive relative clauses from the text on page 50.
Two thirds of the people who lived there were dead or injured.
Workers built shelters for survivors whose homes had been
destroyed.
The number of the people who were killed or badly injured in the quake was more then 400000.
02
Language points
Language points
1.
1.erupt v（火山）爆发；（岩浆、烟）喷出
eruption n.
erupt from
erupt into
erupt violently
volcanic eruption
爆发， 突发
从…喷出
突然变为或发展成(更坏的事)
猛烈地爆发
火山喷发
The demonstrations erupted into violence.
示威游行爆发为暴力行为。
The place was recently visited by a serious_____________________
这个地方最近发生了一次严重的火山爆发。
③The____________(erupt)of the volcano makes many people lose their live.
近义词
volcanic eruption
eruption
explode vt＆vi爆炸
blow up爆炸
2. supply n.pl 供给品；供应量 vt 供应，提供
food/water/gas/electricity supply
supply chain
supply and demand
in short supply
a supply of
食物/水/媒气/电供给
供应链
供求关系
供应不足
一批;许多
1 The hospital promises to supply people___________ the best possible medical care.
2.Food is__________________ all over the country.
食品在全国各地都供应不足。
3.she survived because of ________plentiful supply of fresh water.
由于有充足的淡水供应，她活了下来。
4 The universities are now offering a wider range of courses_____________students for them to choose.
那些大学设有更广泛的课程供学生选择。
with
in short supply
a
to
3.in the open air
与air相关的词语:
Air alarm
air conditioner
air current
air line
air liner
air show/mail
by air
in the air
on the air
in the open
空袭警报
空调机
气流
航空公司;航线
客机
航空表演/航空邮件
乘飞机
在传播中
正在广播
在户外;在野外
1).drinking tea ______________________ is an agreeable enjoyment.
在露天品茶是种享受.
2).Since travelling______________ is much faster,they decided to take a plane.因为乘飞机旅行快得多，他们就决定坐飞机。
与air相关的介词短语
3) Several visitors at the_________were killed when a plane crashed.
飞机坠毁，几名观看航空表演的游客不幸程难。
4) He will speak________the air this evening.今晚他将在广播中演说。
5)Children like to run around_______________________________
孩子们喜欢在户外跑来跑去。
in the open air
by air
air show
on
in the open
03
Exercises
1.Complete each sentence with that, which, who, whose, whom, or"/"Then translate the sentences into Chinese.
1) Here are some of the people________homes were destroyed by the typhoon"
2) The terrible shaking of the building woke up all the people _______were asleep.
3) The next day, people put up shelters in the open air using anything___________they could find.
4 )Several days later, most of the buildings _____________had been damaged by the hurricane were repaired.
Exercise
that或which
that或/
who或that
whose
5. The injured boy_______________mother was lost in
the disaster was taken to the hospital.
6 The woman wrote a thank-you letter to the soldier by ______________she was resuced.
7 Is this the young boy_____________saved several other students trapped under buildings.
Exercise
who或that
whom
whose
2.Work with a partner. Take turns to ask each other about the pictures.
What’s the rescue
worker doing?
She’s feeding the baby
who survived the
earthquake.
It is a baby who was rescued from under the ruins.
Who is the baby in her arms?
Exercise
1.She and her family bicycle to work，___________helps them keep fit (2018·北京卷)
2. Kate, _____________sister I shared a room with when we were at college, has gone to work in Australia(2018·天津卷)
3. During the rosy years of elementary school, I enjoyed sharing my dolls and jokes _______________allowed me to keep my high social status.(2019·全国I卷)
高考链接
which
which
whose
4. The little problems_____________we meet in our daily lives maybe
inspirations for great inventions.(2017?北京卷)
5, But Sarah,__________has taken part in shows along with top models,
wants to prove that she has brains as well asbeauty.(2017?全国Ⅲ卷)
6. Like anything, it is possible to have too much fat and salt,
________________is not good for the health(2017?全国卷)
that
which
who
Summary
1.Study some important words and phases in this part.
2. Grasp the usage of the restrictive relative clause.
3. Know usage of whose,who,as ,which
Homework
谢谢
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中小学教育资源及组卷应用平台
人教版（2019）英语Unit4 Natural disasters
Period 3 Discovering Useful Structure 教学设计
课题 Period3 discovering useful structure 单元 Unit 4 Natural disasters 学科 English 年级 高一 必修一
教材 分析 This teaching period mainly deal with discovering useful structure. Students are expected to the knowledge about how to use the attribute clause. The teachers are expected to enable students to master some knowledge about the attribute clause.
教学目标与核心素养 Knowledge objectives: Enable students to acquire the basic usage of the attribute clause. skill objectives: Enable students have a good understanding of grammar skills. Emotional objectives: Develop students’ sense of cooperative learning and individual capability.Thinking quality objectives: Inspire the students’ spirit of protecting the environment.
重点难点 How to use the attribute clause.Grasp some grammar skills.
教学过程
教学环节 教师活动 学生活动 设计意图
导入新课 Step1 lead in1.Ask students to look at the picture of the little actor in Qing yunian.discuss some questions about him.T:Do you know who is he? Ss:He is Han haolin T:Which role did he played in Qing yunianSs:He plays the role of little Fanxian. T:Can you use attribute clause to describe han haolin? T: He is Han haolin, who plays the role of little Fanxian. 2.Review the attribute Ask the students to underline the attribute.在句中修饰名词 (?http:?/??/?www.so.com?/?s?q=%E5%90%8D%E8%AF%8D&ie=utf-8&src=internal_wenda_recommend_textn?)或代词 (?http:?/??/?www.so.com?/?s?q=%E4%BB%A3%E8%AF%8D&ie=utf-8&src=internal_wenda_recommend_textn?)的成分 (?http:?/??/?www.so.com?/?s?q=%E6%88%90%E5%88%86&ie=utf-8&src=internal_wenda_recommend_textn?)叫定语。 They are talking about a maths problem.It is very near from here to his school.The man upstairs is a professor of Shandong University.The picture on the wall was drawn by my daughter. 以小组为单位鼓励学生讨论? 同桌之间相互讨论 通过讨论，来引导学生的发散思维，并使学生认识到本课主题—定语从句 通过讨论复习一些关于定语的知识。
讲授新课 STEP 2 NEW WORDSLet the students to translate the sentences and pay attention to the words in red.1).The volcano in this place erupted suddenly. erupt:['r?pt] -----eruption n 2).The government supplied plentiful supplies to this area. Supply:[s?'pla?] Supply and demand 供求关系provide sth to sb supply sb with sth supply sth to sb. 提供某人某物 offer sb, sth offer sth to sb (2018·浙江) Caffeine， a chemical typically found in coffee, has caused a lot of concern because it is one of the few drugs that show up regularly in our_____________。food supplyExercises 1.Scientists say Mount Pinatubo could?____?againsoon.(eruption) 2.The school provided food _________ the students. 3.The cars will be supplied ___people all over the country. 4.She offered me to a cup of tea. 5.They provided us __________all the books we need. 1.erupt 2.for 3.to 4. To 去掉5.withStep3 GrammarHe is Han haolin, who plays the role of little Fanxian定语从句定义：在从句中修饰某一名词代词的从句。 二。定语从句的构成 先行词+关系词+定语从句关系词的作用：1.连接主句和从句 2.指代先行词 3.在从句中充当成分 三。定语从句的关系代词关系代词 先行词 在句子所做的成分 That人、物主语、宾语、表语 Which物 主语、宾语 Who人主语、宾语 Whom人宾语 Whose人、物定语 as人、物主语、宾语、表语 1.that既可指人也可指物，在定语从句中可作主语、宾语或表语，作宾语时可省略。 The number of people _____come to visit this city each yearreaches one million.每年来游览这座城市的人数达到100 万。(指人，作主语) thatThis is the suitcase________she is looking for 这就是地在找的那个手提箱。(指物，作宾语)that 2 which指物，在定语从句中可作主语或宾语，作宾语时 可省略。 They ignored the details _______might account for the accident.他们忽略了那些或许可以解释事故发生原因的细节。(作主语)which 3.who指人，在定语从句中可作主语或宾语，作宾语时可省略。We are concerned about people ________have suffered a lot in the earthquake.我们为在地震中受重创的人们担心(作主语) who Danny was the man __________ we rescued from the ruins.丹尼是我们从废墟中救出来的那个人。(作宾语) who 4.whom指人，在定语从句中作宾语，可省略，也可用who代替。 Rose is the person________you should care about罗丝是你应该关心的人。(作宾语)who/whom 5. whose既可指人也可指物，表“所属”关系，在定语从句中作定语。 I know the person___________ house was totally destroyed in the earthquake.我认识那个人，他的房子在地震中被彻底推毁了。whose 【误区警示①关系代词指代先行词在定语从句中当主语、宾语、表语或定语，因此定语从句中不能再出现关亲代词所替代的名词或代词。 昨天晚上我们看的邴部电影非常吓人 The film that /which we saw it last night was very frightening ( X) The film (that /which we saw last night was very frightening (V)②关亲代词在从句中作主语时不能省略，作宾语时可以省略。 Is that the girl____________ you spoke of the other day.那就是你前几天所提封的女孩吗? (whom /who/that)宜用that就不宜用 which引导定语从句的情况 1.当先行词被序数词或形容词最高级修饰时。 The first thing ______you should do is call the police right away.that 你应做的第一件事就是马上报警。(词汇复现) This is the most delicious food ________ I have ever had.that 这是我吃过的最美味的食物。 2当先行词是all，any，little，few， much， ever anything, nothing，none等不定代词或被这些词修饰时。 All ________ can be done has been done.一切能做的都已经做了。.that Tell me everything __________ you know.that 把你知道的一切都告诉我吧。 Please send us any information___________you have about the subject.有关这个主题的任何资料请都寄给我们。.that 3.当先行词被由 the only， the very， the last， the same等修饰时。 The only thing _________she could do was to go to the Police for help.他唯一能做的事就是去求助警察。.that This is the very book___________ I want to buy.这就是我想买的那本书。.that 4.当先行词既包括人又包括物时。 Sometimes we should ignore the persons and things _____________upset us.有时，我们应该不理会让我们不快的人和事。.that 5.当主句是以who或者 which开头的特殊疑问句时。 Which of the books ____________you bought is the most useful for my writing?你买的书中哪一本对我的写作最有用? .that 宜用 which不宜用that引导定语从句的 情况 1.引导非限制性定语从句时。 Football, _____________ is an interesting game, is very popular all over the world.which 足球是一项有趣的运动，在全世界非常受欢迎。 2.当关系代词前有介词时。 This is the house in __________ Mo Yan once lived.which这就是莫言曾经住过的房子。 定语从句中的主谓一致1.关系代词在从句中作主语时，定语从句谓语动词复数形式根据先行词的形式确定 The old town has narrow streets and small houses that _________ built close to each other.are 旧城区的街道狭窄，房子小，彼此挨得很近I'm fond of th Piece of music which _________ popular with the teenage.is 我喜欢在青少年中流行的那支曲子。 One of+复数名词+定语从句(复数谓语) 2. the only one of+复数名词+定语从句(单数谓语He is one of the students who____________a good command of French.他是精通法语的学生之一。( the students为先行词) haveHe is the only one of the students who_________ a good command of French.他是学生中唯一精通法语的。( the only one为 先行词)has关系代词as引导的定语从句1.as既可指人也可指物。在定语从句中可作主语、宾语或表语。它常用在 the same.as，such，as.等结构中as不能省略。 Such reasons __________we give can persuade him to give up his foolish plan.我们给出的这些理由可以说服他放弃他的 愚蠢计划。asI'll buy the same dictionary____________ you have.as 我要买和你的一样的词典 【误区警示 当光行词被 the same修饰时，也可用that引导定语从向 但指同一物，而不是同一美 This is the same bike _____________l lost two months ago.that 这就是两个月前我丢的邓辆自行车。(同一辆自行轩) This is the same bike__________l lost two months ago.as 这辆自行跟两个月前我去的那辆一样。 (同样的自行车，但不是同一辆) 2 as引导非限制性定语从句，代替整个主句的内容。从句可放在主句前、主句后或主句中间。As you know. She is a stubborn girl, and I can’t persuade her to change her mind. My grandfather is fond of talking about the good old days_____ is often the case with old people.as 我爷喜欢谈论过去的美好时光，这种情况在老年人中 较为常见。 as引导非限制性定语从句常用的固定表达： as we all know众所周知 as is well known众所周知 as you see如你所见 we expect正如我们预料的那样 as often happens正如经常发生的那样as I can remember 正如我所记得的 as has been said before如前所述 ass/ was expected正如预料的那样 as can be seen正如所见 as is often the case情况常常是这样 step4 exercises1.Find and underline the restrictive relative clauses in the sentences below What function do the restrictive relative clauses have? 1)The Tangshan earthquake is a terrible experience that my grandma cannot forget. 2)The couple who live next to us volunteered to help after the volcano erupted. 3)The supplies which were provided to the disaster area were collected from around the country. 4)A doctor with whom James used to work died in the 2016 earthquake in Ecuador. 2.Find more sentences with restrictive relative clauses from the text on page 50. Two thirds of the people who lived there were dead or injured. Workers built shelters for survivors whose homes had been destroyed. The number of the people who were killed or badly injured in the quake was more then 400000. 2.Complete each sentence with that, which, who, whose, whom, or"/"Then translate the sentences into Chinese. 1) Here are some of the people________homes were destroyed by the typhoon" 2) The terrible shaking of the building woke up all the people _______were asleep. 3) The next day, people put up shelters in the open air using anything___________they could find. 4 )Several days later, most of the buildings _____________had been damaged by the hurricane were repaired. 5. The injured boy_______________mother was lost in the disaster was taken to the hospital. 6 The woman wrote a thank-you letter to the soldier by ______________she was resuced. 7 Is this the young boy_____________saved several other students trapped under buildings. 1.whose 2.who或that 3. That 或/4. that或which5. whose 6. Whom 7.who或that3.Work with a partner. Take turns to ask each other about the pictures.A:What’s the rescue worker doing? B:She’s feeding the baby who survived the earthquake. A:Who is the baby in her arms? B:It is a baby who was rescued from under the ruins. Step5 高考链接1.She and her family bicycle to work，___________helps them keep fit (2018·北京卷) 2. Kate, _____________sister I shared a room with when we were at college, has gone to work in Australia(2018·天津卷) 3. During the rosy years of elementary school, I enjoyed sharing my dolls and jokes _______________allowed me to keep my high social status.(2019·全国I卷) 4. The little problems_____________we meet in our daily lives maybe inspirations for great inventions.(2017?北京卷)5, But Sarah,__________has taken part in shows along with top models, wants to prove that she has brains as well as beauty.(2017?全国Ⅲ卷) 6. Like anything, it is possible to have too much fat and salt,________________is not good for the health(2017?全国卷) 1.which 2.whose 3.which 4. That或/5.who 6. which 学生阅读并翻译句子 学生认知听讲，并识记。 学习并熟记单词和短语。 完成练习题 掌握句中单词的含义，并会熟练运用。 通过讲授知识，来使学生了解定语从句的相关知识。并能熟练掌握关系代词的用法 让学生掌握这些单词与短语及其用法，增加词汇量。 通过练习，巩固时态的知识。
课堂小结 Step6 1.Study some important words and phases in this part.2. Grasp the usage of the restrictive relative clause.3. Know usage of whose,who,as ,which Step7 1.Recite the words and phrases.2.Do the exercises on your exercise book.
板书 STEP 2 NEW WORDS Let the students to translate the sentences and pay attention to the words in red. 1).The volcano in this place erupted suddenly. erupt:['r?pt] -----eruption n 2).The government supplied plentiful supplies to this area. Supply:[s?'pla?] Supply and demand 供求关系provide sth to sb supply sb with sth supply sth to sb. 提供某人某物 offer sb, sth offer sth to sb Step3 Grammar 定语从句定义：在从句中修饰某一名词代词的从句。 二。定语从句的构成 先行词+关系词+定语从句 关系词的作用：1.连接主句和从句 2.指代先行词 3.在从句中充当成分 三。定语从句的关系代词 关系代词 先行词 在句子所做的成分 That 人、物 主语、宾语、表语 Which 物 主语、宾语 Who 人 主语、宾语 Whom 人 宾语 Whose 人、物 定语 as 人、物 主语、宾语、表语 1.that既可指人也可指物，在定语从句中可作主语、宾语或表语，作宾语时可省略。 2 which指物，在定语从句中可作主语或宾语，作宾语时可省略。 3.who指人，在定语从句中可作主语或宾语，作宾语时可省略。 4.whom指人，在定语从句中作宾语，可省略，也可用who代替。 5. whose既可指人也可指物，表“所属”关系，在定语从句中作定语。 【误区警示①关系代词指代先行词在定语从句中当主语、宾语、表语或定语，因此定语从句中不能再出现关亲代词所替代的名词或代词。 昨天晚上我们看的邴部电影非常吓人 The film that /which we saw it last night was very frightening ( X) The film (that /which we saw last night was very frightening (V)②关亲代词在从句中作主语时不能省略，作宾语时可以省略。 宜用that就不宜用 which引导定语从句的情况 1.当先行词被序数词或形容词最高级修饰时。 2当先行词是all，any，little，few， much， ever anything, nothing，none等不定代词或被这些词修饰时。 3.当先行词被由 the only， the very， the last， the same等修饰时。 4.当先行词既包括人又包括物时。 宜用 which不宜用that引导定语从句的 情况 1.引导非限制性定语从句时。 2.当关系代词前有介词时。 定语从句中的主谓一致1.关系代词在从句中作主语时，定语从句谓语动词复数形式根据先行词的形式确定 One of+复数名词+定语从句(复数谓语) 2. the only one of+复数名词+定语从句(单数谓语 关系代词as引导的定语从句1.as既可指人也可指物。在定语从句中可作主语、宾语或表语。它常用在 the same.as，such，as.等结构中as不能省略。 【误区警示 当光行词被 the same修饰时，也可用that引导定语从向 但指同一物，而不是同一美 This is the same bike _____________l lost two months ago.that 这就是两个月前我丢的邓辆自行车。(同一辆自行轩) This is the same bike__________l lost two months ago.as 这辆自行跟两个月前我去的那辆一样。 (同样的自行车，但不是同一辆) 2 as引导非限制性定语从句，代替整个主句的内容。从句可放在主句前、主句后或主句中间。 as引导非限制性定语从句常用的固定表达： as we all know众所周知 as is well known众所周知 as you see如你所见 we expect正如我们预料的那样 as often happens正如经常发生的那样 as I can remember 正如我所记得的 as has been said before如前所述 ass/ was expected正如预料的那样 as can be seen正如所见 as is often the case情况常常是这样
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