电极极化-歧的拼音
时间状语从句 常见的从属连词有:(注意其汉语意义)
when,
while, as, before, after, since, until (till) once
as soon as, the moment, the minute,
immediately, directly, eachevery time, the
first time, the last time, next time, by the time,
whenever等。例如:
EveryEach time I was in
trouble, he would come to my help.
I
thought her nice and honest the first time I met
her.
注意:(1)when, while, as的区别:
1
)when引导从句时,主从句的动作有先有后,也可以同时进行,从句的动作可以是持续性的,
也可以
是短暂的。如:
When I got to the airport, the
plane had already taken off. (主先从后)(短暂性)
When I lived there, I used to go to the
seaside on Sundays. (同时) (持续性)
When the
movie ended, the people went back. (从先主后)
2)while侧重主从句动作的对比,且从句的动词必须是持续性的。如:
While we were chatting she was looking at the
time table on the wall.
3)as引导从句时侧重主从句动作同
时或几乎同时进行,从句的动作可以是持续性的,也可以
是短暂的。如:
Sometimes I watch TV as I am having breakfast.
4)when和while还可以是并列连词,意思分别是“就在这时”,“然而”。如:
I was having a rest on the sofa when the
telephone rang.
They were surprised that
a child should work out the problem while they
couldn’t .
注:并列连词when常用与以下句型中:
①…waswere doing…when…(正在做…突然)
②…waswere about to do…when…(刚要做…突然)
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③…waswere on the point of
doing…when…(刚要做…突然)
④…had just
done…when….(刚一…就)
⑤HardlyScarcely
had…done…when…(刚一…就)
(2)before引导从句时,词义非常灵活,注意下列句子中的before的词义:
I could get in a word, the tailor had
measured me.(还没来得及…就)
hadn’t run a mile
before he felt tired.(还没…就)
had sailed 4
days before we saw land.(…才…)
write it
down before you forget it.(趁还…没就)
(3)till
(until) 和not…till (until)
1) till
(until):主句谓语动词必须是持续性的,意思是“到…为止“如:
He
remained there tilluntil she arrived.
2)
not…till (until)…: 主句谓语动词必须是短暂性的,意思是“直到…才”如:
She won’t go to bed tilluntil he returns home.
3) not…until还有强调式和倒装式:
强调句:It is
not until he returns home that she will go to bed.
倒装句:Not until he returns home will she
go to bed.
(4)几个极易混淆的时间状语从句:
1) It was +时间点+when…(当的时候时间是)
It was
5 am when we arrived at the village.
2)
It waswill be+时间段+before…(没过…就/过了…才)
It
waswill be two weeks before we metmeet again.
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3) It is has been
+时间段+since…(自从…以来有…)
It ishas been 3
years since we last met.
突破点:一看be动词的时态,二看时间段还是时间点。
注意:在“It is
has been +时间段+since…”句型中,从句的动词必须是短暂性的,如果是延续
性的动
词,时间要从从句的动作结束时算起。如:
It is 3 years since I
smoked.( 我戒烟有三年了)
补充:as soon as, immediately,
directly, instantly, the moment, the minute, the
instant, no
sooner…than…, hardlyscarcely….when
….和once这些从属连接词引导的从句都表示
从句的动作一发生,主句的动作随即就发生,常译为“
一…就…”。从句中一般时态代替
将来时态。
every time, each
time, next time, the first time, any time, all the
time等名词短语用来引
导时间状语从句,表示“每当…..,每次…..;下次……”等。
练习题
1. It was quiet ________ those
big trucks started coming through the town.
A.
before B. after C. until D. unless
2. It
seemed only seconds ________ the boy finished
washing his face.
A. when B. before C. after
D. even if
3. Hardly had he reached the school
gate ________ the bell rang.
A. while B. when
C. as D. as soon as
were told that we should
follow the main road _____ we reached the central
railway station.
A. whenever B. until
C. while D. wherever
5. I recognized you
________ I saw you at the airport.
A. the
moment B. while C. after D. once
6. He was
about to go to bed ________ the doorbell rang.
A. while B. as C. before D. when
7.________I listen to your advice, I get into
trouble.
A. Every time B. When C. While D.
Until
8. _____ John was watching TV, his wife
was cooking.
A. As B. As soon as C. While D.
Till
9. The children ran away from the
orchard(果园) ______ they saw the guard.
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A. the moment B. after C. before D. as
10. No sooner had I arrived home _____ it
began to rain.
A. when B. while C. as D. than
11. Several weeks had gone by _____ I realized
the painting was missing.
A. as B. before
C. since D. when
12. It _____ long before
we ____ the result of the experiment.
A. will
not be; will know B. is; will know C. will
not be know D.
is; know
13. –What was
the party like?
--Wonderful. It’s years
_____ I enjoyed myself so much.
A. after B.
before C. when D. since
14. The new
secretary is supposed to report to the manager as
soon as she_____.
A. will arrive B. arrives
C. is going to arrive D. is arriving
15.
_____ got into the room _____ the telephone rang.
A. He hardly had; then B. Hardly had he;
when C. He had not; then D.
Not had he;
when
16. No sooner had he finished his talk
_____ he was surrounded by the workers.
A. as
B. then C. than D. when
17. –Did you
remember to give Mary the money you owed her?
--Yes, I gave it to her _____ I saw her.
A. while B. the moment C. suddenly D. once
18. I thought her nice and honest _____ I met
her.
A. first time B. for the first time C.
the first time D. by the first time
19. He
will have learned English for eight years by the
time he _____ from the
university next year.
A. will graduate B. will have graduated C.
graduates D. is to graduate
20. The moment
the 28 Olympic Games _____ open, the whole world
cheered.
A. declared B. have been declared
C. have declared D. were declared
答案:CBBBA DACAD BCDBB CBCCD
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th
状语从句
一、时间状语从句 1、
as soon as “一、、、、、、就、、、、、、”引导时间状语从句的连词有
The
moment The minute
directly instant immediately
No
sooner than
Hardly
had sb , done… when ….did ….. Scarcely
when
The moment she comes, I’ll call you.
She left immediately the meeting was over.
Hardly had he got off the bus when he heard
a loud noise
2、 when ,while , as
引导时间状语从句时间点段时间 区 别 When 主从同时先后While 主从同
时 对比
As 主从同时 (一边、、、一边)
It was raining when we
arrived.
My mother came in when I was doing
my homework.
While when I was doing my
homework, my mother came in. I am safe while I am
here.
He hurried home, looking behind as he
went. As I left the house, I forgot the key.
主从句时
态 Will you please bring me your book
when you come here tomorrow?
I will go
home when I have finished my work . When while
连词引导并列
句 Was were about to do … Was were going
to do …. Waswere on one’s way…
Was .were on
the point of doing…. When ….
Waswere
doing…. (“这时” 表同时) Had done …
Jasmine was holidaying with her family in a
wildlife park when she was bitten on the leg by a
lion.
…….while …….(“然而” 表反比)
I do every
single bit of housework while my husband Bob just
does the dishes now and then. 3、
before
引导时间状语从句 1)“还没等”(谓语不用否定式)
Before they got to
the bus stop, the bus had gone.
2) “…..
(之后)才就”
It was evening before we reached
the little town of Winchester. 3)固定句型:
It
will (not) be some time before ……
do ……
It was (not) some time before ….did …..
It won’t be long before ……do……
It
wasn’t long before ……did…..
4 . until
till ( till 不用于句首或强调句) 引导时间状语从句 1)…..not
….untiltill…直到……
才
He didn’t go to bed
until he had finished his work 2) …...until till
…..直到……为止
We were told that we should
follow the main road until we reached the railway
station .
3)强调句式
It is not until …that
…
It was not until midnight that he went
back home after the experiment.
4) not until
放在句首时,主句半倒装。
Not until he came close to me
did I recognize him. 5. since 引导时间状语从句
1)主句(现在完成时)+(ever)since +状从(过去
时) Mr. Li
has been here ever since he came back
2) it
is has been )+段时间+since 装从(过去
时) It is five
years since they got married. It is over ten years
since he worked here. 6.还有部分连
5 7
词引导时间状语从
句 The first time
each time The last time every time
Next time by the time
(Shortly)
after (Soon) after Once
By the
time + 状从(过去时),主句(过去完成时) By the time + 状从
(现在时),主句(将
来完成时)
By the time she came
back, all the guest had left.
By the time the
class is over, we will have finished learning the
whole passage. The first time I we
nt to New
York City, I was completely lost. He would bring
me something good to eat each time h
e came.
Shortly after he had finished school, he found a
job in the company.
练习题
1. It was quiet
________ those big trucks started coming through
the town.
A. before B. after C. until D.
unless
2. It seemed only seconds ________
the boy finished washing his face.
A. when B.
before C. after D. even if
3. Hardly had he
reached the school gate ________ the bell rang.
A. while B. when C. as D. as soon as
were told that we should follow the main road
_____ we reached the central railway station
.
A. whenever B. until C. while D. wherever
5. I recognized you ________ I saw you at the
airport. A. the moment B. while C. after D. once
6. He was about to go to bed ________ the
doorbell rang. A. while B. as C. before D. when
7.________I listen to your advice, I get into
trouble. A. Every time B. When C. While D. Until
8. _____ John was watching TV, his wife was
cooking. A. As B. As soon as C. While D. Till
9. The children ran away from the
orchard(果
园) ______ they saw the guard. A. the
moment B. after C. before D. as
10. No sooner
had I arrived home _____ it began to rain. A. when
B. while C. as D. than
11. Several weeks had
gone by _____ I realized the painting was missing.
A. as B. before C. since D. when
12. It _____ long before we ____ the result of
the experiment.
A. will not be; will know
B. is; will know C. will not be know D. is;
know
13. –What was the party like?
--Wonderful. It’s years _____ I enjoyed myself so
much. A. after B. before C. when D. since
14. The new secretary is supposed to report to
the manager as soon as she_____. A. will arrive
B.
arrives C. is going to arrive D. is
arriving
15. _____ got into the room _____
the telephone rang.
A. He hardly had; then
B. Hardly had he; when C. He had not; then D.
Not had he; when
16. No sooner had he
finished his talk _____ he was surrounded by the
workers. A. as B. then C.
than D. when
17. –Did you remember to give Mary the money
you owed her?
--Yes, I gave it to her _____
I saw her. A while B. the moment C. suddenly D.
once
18. I thought her nice and honest _____
I met her.
A. first time B. for the first
time C. the first time D. by the first time
19. He will have learned English for eight
years by the time he _____ from the university
next year
. A. will graduate B. will have
graduated C. graduates D. is to graduate
20. The moment the 28th Olympic Games _____
open, the whole world cheered. A. declared B.
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have been declared C. have
declared D. were declared
答案:CBBBA DACAD BCDBB CBCC
7 7
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