Electronics must be programmed before they can work.必须为计算机编好程序它才能工作。
New ideas sometimes have to wait for years before they are fully accepted.有时候新的思想必须等待多年以后才能被人们完全接受。
(2)when引导时间从句时，如果出现在后半句，则表示“这/那时突然”。如：
He was almost hurt when the bus came to a sudden stop.(1991年6月四级考题)
I have just started back for the house to change my clothes when I heard the voices.
(3)when it comes to 是习惯用法，意为“当谈到……时”。如：
Doing your homework is a sure way to improve your test scores, and this is especially true when it comes to classroom tests.
(4)名词短语、介词短语each /every time, the moment/second/minute, in the time, by the time起连词作用。如:
I hope her health will have improved greatly by the time we come back next year.
If individuals are awakened each time they begin a dream phase of sleep, they are likely to become irritable even though their total amount of sleep has been sufficient.
My pain must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
Mercury’s velocity is so much greater than the Earth’s that it completes more than four revolutions around the Sun in the time it takes the Earth to complete one.
Now that we have all the material ready, we should begin the new task at once.
He did poorly in the examinations, considering how hard he had tried for them.
Seeing she is lawfully enough to get married, I don’t think how you can stop her.
其他引导原因状语从句的连接词语还有: for the (simple) reason that, by reason that, on the grounds that, in as much as, in so far as等。
5.while, whereas 引导对比从句
如:
While the teenage population in the United States has declined over the past dec
ade, violent crimes committed by juveniles have sharply increased.
A baby might show fear of an unfamiliar adult, whereas he is likely to smile and reach out to another infant.
6.so…that…, with the result that, so much so that 引导结果状语从句
如:
Conversation becomes weaker in a society that spends so much time listening and being talked to that it has all but lost the will and the skill to speak for itself.
Over the years, a large number of overseas students have studied at that university with the result that it has acquired substantial experience in dealing with them.
He himself believed in freedom, so much so that he would rather die than live without it.
7.in order that, in case, for fear that, lest (用虚拟语气) 引导目的状语从句
如:
Give me your telephone number, in case I need your help.
Helen listened carefully in order that she might discover exactly what John wanted.
8.where作为连接副词的一种用法, 翻译为“在……地方”
如:
In Japan, a person’s capabilities are not forced into an inflexible specialty. Where there is willingness and intelligence, there is a place within the company to try and to succeed.
Where the Atlantic Ocean crosses the equator, the trade wind causes a flow of water to the west.
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2006-04-14 18:17:14
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3.时间状语从句的常考知识点
2006-04-14 18:17:14
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加载更多1.形容词性(定语)从句关系代词的省略
(1)that, which 引导定语从句并在从句中做宾语时，可以省略。
(2)that引导定语从句并且从句是there be句型时，可以省略。如：
No one would have the time to read or listen to an account of everything there is going on in the world.
2.副词性(状语)从句的省略
(1)虚拟语气句省略条件连词if，从句采用倒装结构。如：
Had it not been for the timely investment from the general public, our company would not be so thriving as it is.
(2)由although, as if, if, no matter + wh-, once, though, unless, until, when, where, whether, while等连词引导的表示时间、地点、条件、让步、方式的状语从句，可省略主语和助动词be,保留ing分词、ed分词或表语。这样省略的条件是：●从句中被省略的主语必须与主句的主语一致；●谓语动词必须含有be；●从句必须与主语和b
e动词一起省去，不可只省略主语而保留整个谓语，也不可只保留主语而省略谓语。如：
Though raised in San Francisco, Dave Mitchell had always preferred to record the plain facts of small-town life.
Although born in Chicago, the author is most famous for his stories about New York City.
One should never lose one’s heart when confronted with temporary difficulties.
3.比较从句中主语的省略
在这种省略结构中，也可以把than或as当成关系代词。因为主语省略了，所以尤其要注意识别哪个词是省略了的主语，进而选择谓语的数、时态和语态。
These proposals sought to place greater restrictions on the use and copying of digital information than exist in traditional media.
There ought to be less anxiety over the perceived risk of getting cancer than exists in the public mind today.
The project requires more labor than has been put in because it is extremely difficult.
4.that用于引导宾语从句时，可以省略
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(1)before表示汉语的 “只有/必须……才能”。如:
Electronics must be programmed before they can work.必须为计算机编好程序它才能工作。
New ideas sometimes have to wait for years before they are fully accepted.有时候新的思想必须等待多年以后才能被人们完全接受。
(2)when引导时间从句时，如果出现在后半句，则表示“这/那时突然”。如：
He was almost hurt when the bus came to a sudden stop.(1991年6月四级考题)
I have just started back for the house to change my clothes when I heard the voices.
(3)when it comes to 是习惯用法，意为“当谈到……时”。如：
Doing your homework is a sure way to improve your test scores, and this is especially true when it comes to classroom tests.
(4)名词短语、介词短语each /every time, the moment/second/minute, in the time, by the time起连词作用。如:
I hope her health will have improved greatly by the time we come back next year.
If individuals are awakened each time they begin a dream phase of sleep, they are likely to become irritable even though their total amount of sleep has been sufficient.
My pain must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
Mercury’s velocity is so much greater than the Earth’s that it completes more than four revolutions around the Sun in the time it takes the Earth to complete one.
(5)副词directly, immediately, instantly, now引导时间从句, 相当于as soon as。如:
The policemen went into action directly they heard the alarm.
4.原因状语从句的常考知识点
(1)in that引导原因从句时,有时翻译成“是因为”、“就在于”。如:
Advertising is distinguished from other forms of communication in that the advertiser pays for the message to be delivered.
Criticism and self-criticism is necessary in that it helps us to find and correct our mistakes.
(2)now that表示 “既然” ; seeing that, considering表示“鉴于”、“考虑到”。如:
Now that we have all the material ready, we should begin the new task at once.
He did poorly in the examinations, considering how hard he had tried for them.
Seeing she is lawfully enough to get married, I don’t think how you can stop her.
其他引导原因状语从句的连接词语还有: for the (simple) reason that, by reason that, on the grounds that, in as much as, in so far as等。
5.while, whereas 引导对比从句
如:
While the teenage population in the United States has declined over the past dec
ade, violent crimes committed by juveniles have sharply increased.
A baby might show fear of an unfamiliar adult, whereas he is likely to smile and reach out to another infant.
6.so…that…, with the result that, so much so that 引导结果状语从句
如:
Conversation becomes weaker in a society that spends so much time listening and being talked to that it has all but lost the will and the skill to speak for itself.
Over the years, a large number of overseas students have studied at that university with the result that it has acquired substantial experience in dealing with them.
He himself believed in freedom, so much so that he would rather die than live without it.
7.in order that, in case, for fear that, lest (用虚拟语气) 引导目的状语从句
如:
Give me your telephone number, in case I need your help.
Helen listened carefully in order that she might discover exactly what John wanted.
8.where作为连接副词的一种用法, 翻译为“在……地方”
如:
In Japan, a person’s capabilities are not forced into an inflexible specialty. Where there is willingness and intelligence, there is a place within the company to try and to succeed.
Where the Atlantic Ocean crosses the equator, the trade wind causes a flow of water to the west.
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