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本帖最后由 ieyangj08 于 2010-1-3 15:50 编辑
从句
三大从句:名词性从句(包括主语从句,宾语从句,表语从句,同位语从句)、形容词性从句(即定语从句)、副词性从句(即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式)
主语从句
1)主语从句可直接位于主语的位置,如果从句较长,谓语又较短,可用it作形式主语,而将从句放在句末。常见的句型有:
*It is a fact\a pity\a question\good news that...
*It seems\appears\happened\has turned out that...
*It is clear\important\likely\possible that...
*It is said\reported\estimated\has been proved that...
*It is said that comic books create a connection between people of the same generation.
*It seems that the performance is very useful.
2)what引导的主语从句表示“...的东西时”,一般不用it作形式主语。
What we lack is experience.
3)what, who, when, why, whether等词含有各自的疑问意义,但它们引导的主语从句,都用陈述语序。
How the plan is to be carried out should be discussed again.
I did know why I felt like crying.
宾语从句
1) 宾语从句可位于及物动词、介词和某些形容词后。连词that常可省略。介词后一般接疑问词引导的宾语从句。in that(因为),except that(除了),but that(只是)已构成固定搭配,其他介词后一般不接that引导的宾语从句。
*I promised that I would change the situation.
*All this is different from what American young people would say about friendship.
*He is certain that watching so much television is not good for children.
*This article is well-written except that it is a bit too long.
2) 宾语从句后如有宾补,要用形式宾语it来代替,而把宾语从句移至宾补之后。
He has made it clear that he would not change his mind.
3) 在think, believe, suppose, expect等动词后的宾语从句中,如果谓语是否定的,一般将否定词移至主句谓语上,宾语从句则变成肯定形式。
He didn't think that the money was well spent.
表语从句
表语从句出现在结构为“主语+系动词+表语从句”的句子中。表语从句除可用that, what, when, why, whether, how等引导外,还可由because, as if(though)等引导。that常可省略。如主句主语为reason,只能用that引导表语从句,不可用because.
Perhaps the most important thing to remember is that there is no one common type of life in America.
The reason why so many people died there is that there were not enough food supplies.
It looks as if successful international cultural communication will make the world smaller.
同位语从句
同位语从句用于对前面出现的名词作进一步说明,一般用连词that引导,由于先行名词的意义不同,也可用whether, who, when, where, what, why, how等引导。常见的先行名词有fact,idea,belief,news,hope,conclusion,evidence,suggestion,order,problem,report,decision.有时由于谓语较短,将同位语从句位于谓语之后。
She finally made the decision that she would join the fashion show.
I had no idea how many books I could borrow at a time.
The news came that their team had won the championship.
用it作形式主语的that-从句有以下四种不同的搭配关系:
a. It + be +形容词+ that-从句
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明显……
b. It + be + -ed 分词+ that-从句
It is believed that… 人们相信……
It is known to all that… 从所周知……
It has been decided that… 已决定……
c. It + be +名词+ that-从句
It is common knowledge that… ……是常识
It is a surprise that… 令人惊奇的是……
It is a fact that… 事实是……
d. It +不及物动词+ that-分句
It appears that… 似乎……
It happens that… 碰巧……
It occurred to me that… 我突然想起……
定语从句
定语从句所修饰的先行词可以是名词或代词,也可以是一个句子。定语从句通常位于先行词之后,由关系代词或关系副词引导。
1)当先行词是all, anything, everything, something, nothing等不定代词或先行词前有first, last, any, few, much, some, no, only以及形容词最高级修饰时,只能用关系代词that引导从句。
That is all that I've heard from him.
He's the first person that I'm going to interview this afternoon.
2)关系代词的省略
在从句中作宾语的关系代词常可省略。关系代词紧跟介词,作介词宾语时不可用that,只可用which或whom引导从句,并且不可省略,但当介词位于宾语从句句末时,作为介词宾语的关系代词仍可用that,也可省略。
This is one of those things with which we have to put up.
This is one of those things (which\that) we have to put up with.
3)引导定语从句的关系副词有when,where,why等。关系副词在从句中作状语,意义上相当于一个“介词+which”的结构。
Even in comic books where(=in which) there are no words,the stories are fully expressed through the drawings.
No one knows the reason why(=for which) he was so angry that day.
as引导的定语从句
as引导的定语从句主要用于“such...as”及“the same...as”的结构中,代替先行词是人或物的名词。as引导非限制性定语从句时,代替整个主句,从句可位于主句之前、之后或中间。
These are not such problems as can be easily solved.
As is mentioned above, no single company or group can control what happens on the Internet.
时间状语从句
引导时间状语从句的从属连词和词组有:
1)when, whenever, while, as, after, before, since, till, until, once等。
We have learnt quite a lot about it since we came here.
2)as soon as, hardly(scarcely)...when, no sooner...than, each(every) time, the moment, immediately(that)等。
As soon as I sent an e-mail message, I received positive responses.
The moment he heard the good news, he jumped with joy.
地点状语从句
引导地点状语从句的连词是where, wherever.
Wherever she went, she took her little daughter with her.
Where I live there are plenty of trees. 我住的地方树很多。
Wherever I am I will be thinking of you. 不管我在哪里我都会想到你。
原因状语从句
引导原因状语从句的从属连词有:because, as, since, now(that),seeing that, considering that, in that等。
Considering that he is a freshman, we must say he is doing well.
目的状语从句
引导目的状语从句的连词有:so that, in order that, for fear that, lest等,从句常使用may, might, can, could, would等情态动词。
We got up early this morning so that we could catch the first bus to the railway station.
You must speak louder so that /in order that you can be heard by all.
He wrote the name down for fear that(lest) he should forget it.
Better take more clothes in case the weather is cold.
条件状语从句
引导条件状语从句的连词和词组有if, unless, as(so) long as, on condition that, in case, provided(providing) that, supposing等。
As long as you have the right equipment, you can use a telephone line to transmit computer data.
unless = if not. Let's go out for a walk unless you are too tired. If you are not too tied, let's go out for a walk.
让步状语从句
引导让步状语从句的连词和词组有though, although, whether, even though, even if, no matter what(when, how...),whatever(whenever, wherever, however....)等。though, even if等引导状语从句可转换成含有as的部分倒装结构,具有强调意义。其结构为“形容词(副词、动词、名词)+as+主语+谓语”。
No matter what you may say, I would not change my mind.
Young as he is, he is quite experienced in this work.(=though he is young)
Child as he is, he can speak English fluently.(=though he is a child)
1)当有though, although时,后面的从句不能有but,但是 though 和yet可连用
Though the sore be healed, yet a scar may remain.
2) as / though引导的让步从句必须表语或状语提前
Child as /though he was, he knew what was the right thing to do. = Though he was a small child, he knew what was the right thing to do.
Try hard as he will, he never seems able to do the work satisfactorily. = Though he tries hard, he never seems…
3) even if, even though. 即使
We'll make a trip even though the weather is bad.
4) whether…or- 不管……都
Whether you believe it or not, it is true.
5) no matter what = whatever no matter who = whoever no matter when = whenever
no matter where = wherever no matter which = whichever no matter how = however
No matter what happened, he would not mind. Whatever happened, he would not mind.
注意:no matter 不能引导主语从句和宾语从句。
(错)No matter what you say is of no use now.
(对)Whatever you say is of no use now.
(错)Prisoners have to eat no matter what they're given,
(对)Prisoners have to eat whatever they're given. |
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