As的用法小结（2021.10公开课）课件--高考英语一轮复习.pptx

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1、(1)I began as a calculating machine.how i could be made to work as a universal machine.First as a PC and then as a laptop,.As a result I totally changed my shape.(2)I had grown as large as a room.used to make mobile phones as well as help with medical operations.(3)As time went by,I was made smaller

2、.These changes only became possible as my memory improved.As I have grown older I have also grown smaller.高三英语专题复习之一高三英语专题复习之一as的用法小结的用法小结本课重点本课重点outlineoutlineas1.用作用作介词介词2.用作用作副词副词3.用作用作连词连词4.常见固定搭配常见固定搭配1)They talked as old friends.2)They treated us as honored guests.1)Jack is as tall as his fath

3、er.2)He can speak English as fluently as you.1)He shouted aloud as he ran along.2)As it got late,we soon turned back.3)When at Rome,do as Romans do.4)Child as she was,she knew a lot.5)He is as poor as a church mouse(is).6)As is known to all,cultural relics are quite valuable.1.用作介词用作介词Ex.The sun is

4、considered like the source of most forms of energy.1)They talked as old friends.2)They treated us as honored guests.像，如像，如当作，充当，作为当作，充当，作为思考：思考：1.as与与like的区别？的区别？2.“认为认为是是”,“把把当作当作”的表达的表达有哪些？有哪些？astreatas;consideras;regardas.;recognizeas;takeasthink ofas;look onas;refer toas 2.用作副词用作副词1)Jack is as t

5、all as his father.2)He can speak English as fluently as you.Ex.他们没有和你一样努力工作。他们没有和你一样努力工作。asas和和一样一样They didnt work as/so hard as you.思考：思考：asas与与soas的区别？的区别？3.用作连词1)He shouted aloud as he ran along.2)As it got late,we soon turned back.3)When at Rome,do as Romans do.4)Child as she was,she knew a lot.

6、5)He is as poor as a church mouse(is).6)As is known to all,cultural relics are quite valuable.讨论：以上句子讨论：以上句子as分别引导什么从句？分别引导什么从句？时间状语从句时间状语从句原因状语从句原因状语从句方式状语从句方式状语从句让步状语从句让步状语从句比较状语从句比较状语从句定语从句定语从句1)as引导时间状语从句引导时间状语从句译为译为“当当时时”，“随着随着”,“一边一边一边一边”区别区别as,when,while？1.He was about to say something _ the

7、door was opened.2.He was saying something _ the door was opened.The door was opened _ he was saying something.3.He had just said something _ the door was opened.4._ time went by,I got used to the way he did his work gradually.He shouted aloud as he ran along.句型：句型：sb was about to do when did sb was

8、doing when did sb had just done when did did while sb was doing whenwhilewhenwhenAs2)as引导原因状语从句引导原因状语从句区别区别as,because,since,for?1.-Why he was late for school?-As he got up very late.2.It was as everybody here knew him that we found his address easily.3.Because his illness,he couldnt attend the tea p

9、arty.As it got late,we soon turned back.becauseBecauseof3)as引导方式状语从句引导方式状语从句译为：译为：“按照，依照按照，依照”，“正如正如”，“像像”1.I remember the whole thing as _ it happened yesterday.2.Ive loved you as if you _(be)my son.3.He sat there quietly as though nothing _(happen).4.He is dressed neatly every day as if he _(meet)

10、his princess in the next minute.When at Rome,do as Romans do.if/thoughwerehad happenedcould meet4)as引导让步状语从句引导让步状语从句1.He realized that a doctor as he was,he couldnt save everyone.2.Tiring though he was,he insisted on finishing his experiment.3.Hardly as he worked,he didnt achieve much.4.Explain alth

11、ough he might,I still couldnt follow him.Child as she was,she knew a lot.TiredHardas/though5)as引导比较状语从句引导比较状语从句1.Waves of red light are twice as long _ those of blue light.2.Waves of red light are twice _(long)than those of blue light.3.Waves of red light are twice the _(long)of those of blue light.

12、He is as poor as a church mouse(is).倍数的表达倍数的表达:A+V谓谓+倍数倍数+as adj/adv as+B +比较级比较级 than+B +the n.of+Baslongerlength6)as引导定语从句引导定语从句【判断】【判断】A:(Which,As)is reported,strange things happen on this road every two years.B:He took over his fathers company,(which,as)was beyond our expectation.C:He pointed to

13、 the direction from(which,as)he came.D:The palace is such a lovely attraction(which,as)numerous tourists visit every year.E:The palace is so lovely an attraction(that,as)numerous tourists visit it every year.As is known to all,cultural relics are quite valuable.4.常见的固定搭配常见的固定搭配as a matter of factas a result/consequence(of)as a wholeas.as possible/sb.canas followsas for/to/withas it is/wasas usualso as toso.as toas/so far asas/so long asas soon asas well as might/may as well dosuch asas well