(共13张PPT)
(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.
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
as的用法小结
本课重点outline
as
1. 用作介词
2. 用作副词
3. 用作连词
4. 常见固定搭配
They talked as old friends.
They treated us as honored guests.
Jack is as tall as his father.
He can speak English as fluently as you.
He shouted aloud as he ran along.
As it got late, we soon turned back.
When at Rome, do as Romans do.
Child as she was, she knew a lot.
He is as poor as a church mouse (is).
As is known to all, cultural relics are quite valuable.
1. 用作介词
Ex. The sun is considered like the source of most forms of energy.
They talked as old friends.
They treated us as honored guests.
像,如……
当作,充当,作为…
思考:1. as与like的区别?
2. “认为…是…”, “把…当作…”的表达有哪些?
as
treat…as…; consider…as…; regard…as….; recognize…as…; take…as…
think of…as…; look on…as…; refer to…as…
2. 用作副词
Jack is as tall as his father.
He can speak English as fluently as you.
Ex. 他们没有和你一样努力工作。
as…as…和…一样…
They didn’t work as/so hard as you.
思考:as…as…与so…as…的区别?
3. 用作连词
He shouted aloud as he ran along.
As it got late, we soon turned back.
When at Rome, do as Romans do.
Child as she was, she knew a lot.
He is as poor as a church mouse (is).
As is known to all, cultural relics are quite valuable.
讨论:以上句子as分别引导什么从句?
时间状语从句
原因状语从句
方式状语从句
让步状语从句
比较状语从句
定语从句
1) as引导时间状语从句
译为“当……时”,“随着……”,“一边……一边……”
区别as, when, while?
1. He was about to say something _____ the 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:sb was about to do… when …did…
sb was doing… when …did…
sb had just done… when …did…
…did… while sb was doing …
when
while
when
when
As
2) as引导原因状语从句
区别as, because, since, for
---- 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 couldn’t attend the tea party.
As it got late, we soon turned back.
because
Because
of
3) as引导方式状语从句
译为:“按照,依照”,“正如…”,“像…”
I remember the whole thing as ________ it happened yesterday.
I’ve loved you as if you ______ (be) my son.
He sat there quietly as though nothing ________ (happen).
He is dressed neatly every day as if he _______ (meet) his princess in the next minute.
When at Rome, do as Romans do.
if/though
were
had happened
could meet
4) as引导让步状语从句
1. He realized that a doctor as he was, he couldn’t save everyone.
2. Tiring though he was, he insisted on finishing his experiment.
3. Hardly as he worked, he didn’t achieve much.
4. Explain although he might, I still couldn’t follow him.
Child as she was, she knew a lot.
Tired
Hard
as/though
5) as引导比较状语从句
Waves of red light are twice as long _____ those of blue light.
Waves of red light are twice ______ (long) than those of blue light.
Waves of red light are twice the _______ (long) of those of blue light.
He is as poor as a church mouse (is).
倍数的表达: A+ V谓 + 倍数 + as adj/adv as + B
+ 比较级 than + B
+ the n. of + B
as
longer
length
6) as引导定语从句
【判断】
A: (Which, As) is reported, strange things happen on this road every two years.
B: He took over his father’s company, (which, as) was beyond our expectation.
C: He pointed to 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
as a matter of fact
as a result/ consequence (of)
as a whole
as... as possible/ sb. can
as follows
as for/to/with
as it is/was
as usual
so as to
so... as to
as/so far as
as/so long as
as soon as
as well as
might/may as well do
such as
as well