取缔是什么意思-增量模型
时间状语从句
用句子表达一件事情或一个行为发生的时间,这个句子就叫时间状语
从句。时间状语从句根据其所表示的
时间不同,所使用的连词也不同。下面我们一起来看一下几个常见的
时间状语从句:
1.when引导的从句:表示主句的动作和从句的动作同时发生,或从句的动作发生在主句动作之前。
例如:I was going out when a visitor came.
(动词动作同时发生。)我正要出门,有客人来访。
I shall tell her the
good news when she comes.她来时,我将告诉她这个好消息。
小试牛刀:I found mother cooking for me. I got
home.(when)_______________________________________
He was listening to the radio when I
home. (get)
2.while 引导的从句:表示“当……过程中”,强调某一
段时间内主句和从句中谓语动词所表示的动作在同
一时期发生。由于while从句表示一个持续的行为
,所以从句中要用持续性动词,并且持续性动词常用进行时
态。
例如:Keep an
eye on my little sister while I am
away.我不在时,请照看一下我的小妹妹。
While we were watching
TV, Jim came in. 我们看电视的时候,Jim进来了。
小试牛刀:It
started to rain. We were playing
football.(whi
le)_______________________________________
Lucy was cleaning the room Lily was
listening to music.
3.as引导的时间状语从句:表示“当……的
时候;一边……一边……;随着……”,其从句的主语与主句的
主语往往是同一人或物。
例如:She sang as she worked. 她一边工作一边唱歌。=She was
singing as she was working.
I saw him as he
was getting off the bus. 正当他下公共汽车时, 我看见了他。
小试牛刀: we walked, we talked.
You will grow wiser you grow
older.
4.before引导的从句:一般表示主句的动作发生在从句动作之前。
例如:I didn’t know any English before I came
here. 我到这儿来之前,一点英语都不懂。
例如:I had written my
report before my father came back.
小试牛刀:He
bought the ticket he went to see the
film.
5.after引导的从句:表示主句的动作发生在从句动作之后。
例如:After he locked the door, he left.
他锁上门后,就走了。
After he had finished his work, he
played a game of chess with his friend.
他做完工作后,和朋友下
了一盘棋。
小试牛刀:I will go out to
play basketball with you. I finish my
homework.(after)
_______________________
_
He left the classroom
he had finished his homework the other day.
<
br>6.since引导的从句:表示“自从……以来”,从句中的动词一般表示动作的起点,用过去时。主句
中的动词
表示动作延续的情况,一般用现在完成时。如果主句中的动词表示的不是延续的动作而是表示目
前的状态,可
用一般现在时。
例如:Since he met this good
friend, he has made great progress in his studies.
自从遇见了这个好朋友,他已在学习上取得了巨大的进步。
例如:It is twenty
years since she joined the Party.
她入党二十年了。(主句中的动词表示的是状态,
用现在时。)
小试牛刀:it is
five years since we last time.(meet)
Mr green has taught in that school
since he (come) to China three years
ago.
7.until 引导的从句:表示一个动作持续到某一时刻。
(1)表示“直到……”,如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的
意思不
同。
(2)表示“直到……才”,主句用否定式,从句用肯定。如果主句中的谓语动词
是瞬间动词时,必须用否定形
式。
例如:They worked until it
was late. 他们一直工作到天黑。
She didn’t go to bed
until she finished her homework. 她写完作业才睡觉。
小试牛刀:All the people left. He waited.(until)___
_____________________________________
He went
to bed . his father came
8.as soon as
引导的从句表示“一……就”,强调动作紧密相连。
例如:As soon as she came
to the classroom, she began to read
English.她一到教室,就开始读英语。
小试牛刀:We start to sing.
It''s 12 o''clock. (as soon
as)________________________________________
9. by the time 到。。。为止 (所在句子的主句应用完成时)
例如:By
the time he gets there , his father has already
gone.他到家的时候,他爸爸已经走了。
小试牛刀:By the time I got to
school, the class
.(begin)我到校时,已经开始
上课了。
知识扩展
1. it
is +时间段+since+一般过去时(从。。。以来多长时间了)
例如:it is five
years since we met last time.从我们上次见面已经五年了。
2. it is will be +时间段+before+一般现在时 , it
was+时间段 +before+一般过去时 (。。。才)
例如:it is a
long time before I go to sleep . 过了很长时间我才睡着。
it was an hour before the police
arrived.过了一个小时,警察才来。
小试牛刀:It_____(be) ten
years since we ________(leave) that city .
It is reported that it may be two or three
months_____it is possible to test this medicine
on animals
How long do you think
it will be ______ China sends a manned spaceship
to the moon
3、when和while的区别
连词
when
as
区别 所接动词 例句
主从句同时发生、
瞬间性动词、When you arrive in London, please give us a
call.
先后发生 持续性动词 When he was having his lunch,
he heard the door bell ring.
主从句同时发生、 持续性动词
一边…一边…、随着
持续性动词
As time went on,
he grew more and more impatient.
As we walked,
we talked.
While she was reading a novel, her
mother was cooking the
dinner.
Some people
waste food while other haven’t enough.
—I’m
going to the post office.
—While you’re
there, can you get me some stamps
while
主从句同时发生
然而、既然
4、巧记10个瞬间性动词
在学习以when和while引导的时间状语从句时,用到了瞬间动词和延续动词。常见的瞬间动词有
die(死),come(来),go(去),eave(离开),arrive(到达),begin
(开始),buy(买),,join(加入),borrow(借
进,借出),return(归还)
等。
这10个瞬间动词可用两句口诀来帮助记忆: 开始离去,借来还,
出生入死,买到家。
注释:
1.开始离去,借来还为begin,leave,go,bo
rrow,come,return六词;
2.出生入死,买到家为join,die,buy,arrive四词。
3.各词改为相应的延续动词为:
begin→be on, leave→be away
from, borrow→keep, go→be, come→be here, return→be
back,
join→be in, die→be dead, buy→have,
arrive→be here等。'
5、状语从句与主句的时态问题
1.由when、while引导的时间状语从句的时态: (主过从过)
主句(过去进行时)+when +从句(一般过去)
主句(一般过去时)+when
+从句(过去进行时)
主句(一般过去时)+while +从句(过去进行时)
主句(过去进行时)+while +从句(过去进行时)
注意:看动词为短暂性动词用一般过去时,动词为延续性动词则用过去进行时。
小试牛刀:Mother (cook)supper when I
(get) home yesterday.
Last Sunday I
(meet) Lin Hong when I (walk) in the
street.
When the students
(have ) a meeting, the teacher (come) in.
While Han Meimei (sweep)
the floor, Lucy (carry) water.
2. 由when、after、before、by the time引导的时间状语从句的时态:
主句、从句的谓语动词都已完成,则先发生的动作用过去完成时,后发生的动作用一般过去时。
例如:After he had finished his work, he played a
game of chess with his friend.
小试牛刀:When they
(get) to the cinema last light, the film
(start).
I (go) out with
my friends after I (finish) all the
homework last
night.
3.时间状语从句与主句的时态不一致。(主将从现:主句用将来时,而时间状语从句用一般现在时)
小试牛刀:As soon as I reach Canada, I
you up. (ring)
I will call you as
soon as I the result. (know)
He ________ (become) a solider when he
______(grow) up .
He _________ (wait)
until the rain _________ .( stop)
一、单项选择。
1 The meeting didn't start___ everyone was
there.
A. Because B. until C. why D.
if
2 The boy ___ to bed ___ his mother came
in.
A. went not; until B. didn't go;
after C. went; until D. didn't go; until
3.He _________ wait until the rain _________ .
A.won’t, will stop B.won’t, stop C.will,
stops D.will, will stop
4.As soon as Jane
_________ here, I’ll post the letter to Mike.
A.leave B.will leave C.leaves D.left
5.It was already five o’clock _________ we got
home.
A.when B.while C.because D.if
6.—I’m going to the post office. —________
you’re there, can you get me some stamps
A.As B.While C.Because D.If
7.Joan and Mary haven’t seen each
other_____they left school five years ago.
A.as B.before C.after D.since
8.I
will let you know about it as soon as I _________
the news.
A.will get B.gets C.got
D.get
9. He ___ back until the work ___ done.
A. isn't; will be B. isn't; is C. won't
be; will be D. won't be; is
10. I call the
police for help I saw the thief.
A.while B.before C.as soon as
D.after
11 They didn't start the work ___
their teacher came back.
A. until B.
while C. as soon as D. if
12. Tom
will call me as soon as he ___ Shanghai.
A.
arrives B. will reach C. arrives in D.
get to
13. I'm sure he'll come to see me
before he ___ Beijing.
A. will leave B. is
leaving C. leave D. leaves
14. I will
tell him the news as soon as he___ back.
A.
come B. comes C. will come D. came
won't believe you___ I have seen it with my own
eyes.
A. before B. until C. after
D. when
16. He ___ home ___ she was satisfied
___ his answer yesterday.
A. didn't go;
until; with B. wasn't go; after; to
C. doesn't go; before; with D. didn't go;
until; to
二、用方框中的单词填空。
when 、before、 after
、as 、since、 while、 until 、as soon as
1.Mum
was making cookies in the kitchen ______the
telephone rang.
2.I was watching TV ______ my
wife was cooking.
3.He had worked in a factory
for two years ______ he went to college.
4.I
shall play chess with you ______ I finish watching
TV.
5.He didn’t get to the airport ______ it
was dark.
6.She sang ______ she went along.
7.I haven’t heard from him _____ he went to
America.
8.We found the books two days ____ he
had gone away.
三,完成句子。
1.他进来时,我在吃饭。
,I was eating.
2.我在那封信寄到之前去北京了。
I had
left for Beijing just
.
3.当我在玩电脑游戏时, 爸爸在听音乐。
Father was
listening to music the
computer games.
4,当我有时间,我就去看望我的爷爷。
I will
visit my grandpa
.
5.他一到学校就把一切都准备好了。
She got
everything ready
.
6. 你一到上海就给我打个电话好吗
Will you please
call me ______ ______ ______ you get to Shanghai.
7. 他长大后相当一名记者。
He wants to be a
journalist ______ _______ _______ _______.
答案:1-5 BDCCA 6-10 BDDBC
ACDBBA
答案:
1.when 2.while
3.before 4.as soon as
5.until 6.as
7.since 8.after
When she came in
before the letter arrived
While I was
playing
when I have time
as soon as she
got to school
as soon as
when he grows up.
1、答案:When I got home, I found mother
cooking for me.I found mother cooking for me when
I got
home.
2、答案:We start to sing as soon
as it''s 12 o''clock.
3、答案:I will go out to
play basketball with you after I finish my
homework.
4、答案:He waited until all the people
left.
5、答案:It started to rain while we were
playing football