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0910AW SPECTACULAR 之【SU & SY SO】第六期——从句
从句
从句是相对于主句而言的,即它是从属于某一个主句,而不能单独作一个句子。在英语中,主要有三大从句,即名词性从句(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、方式等)。
名词性从句主语从句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.
一、名词性从句之宾语从句
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.
二、名词性从句之表语从句
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.
三、名词性从句之同位语从句
有时由于谓语较短,将同位语从句位于谓语之后。
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……
四、形容词性从句(即定语从句)
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.
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代替先行词problems)
As is mentioned above,no single company or group can control what happens on the Internet.(as代替主语)
五、副词性从句(即状语从句)
1。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。
2)as soon as, hardly(scarcely)...when, no sooner...than, each(every) time, the moment, immediately(that)等。
2. 地点状语从句引导地点状语从句的连词是where, wherever.
3. 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。
比较:because, since, as和for
1) because语势最强,用来说明人所不知的原因,回答why提出的问题。当原因是显而易见的或已为人们所知,就用as或 since。
I didn't go, because I was afraid.
Since /As the weather is so bad, we have to delay our journey.
2) 由because引导的从句如果放在句末,且前面有逗号,则可以用for来代替。但如果不是说明直接原因,而是多种情况加以推断,就只能用for。
He is absent today, because / for he is ill.
He must be ill, for he is absent today.
4. 结果状语从句引导结果状语从句的连词有:so...that, such...that, so that, that, so等。
5. 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。
6. 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。
if 引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。
unless = if not.
7. 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”。
as / though引导的让步从句必须表语或状语提前(形容词、副词、分词、实义动词提前)。
注意:no matter 不能引导主语从句和宾语从句。 |
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