状语从句按其意义和作用的划分

状语从句按其意义和作用可分为:
a)时间状语从句
b)地点状语从句
c)原因状语从句
d)目的状语从句
e)结果状语从句
f)条件状语从句
g)方式状语从句
h)比较状语从句
i)让步状语从句

2.时间状语从句
引导时间状语从句的从属连词有：when, while, as, whenever, before, after,
since, till, until, as soon as, once, hardly…when, no sooner…than等引导。如：
When he was still a young man, he was forced to leave his homeland for
political reasons.
注意：
a)when, as, while
即可引导持续性动作，又可引导短暂性动作。它可以表 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。如：
When I was a boy, I used to go to the seashore on Sundays.（同时）
When the lesson was over, we began our writing.（从句动作在前）
引导持续性动作，侧重主句和从句的动作同时发生。
He hurried home, looking behind as he went.
I saw your sister as she was getting on the bus yesterday.
He sang as he walked.
：指的是“在某一时间里”， “在……期间”，从句里的动 作必须是持续性
的，它也强调主句和从句动作的同时发生，往往侧重主句和从句动作的对比。如：
While he was in London, he studied music.
While we were watching TV, he was writing a composition.
while也可做并列连词，表示对照的含义，意思为“而”。如：
He is tall while his brother is short.
当when, as, while表示“在…一段时间里”，主从句的动作同时发生时，可以换用。
如：While (When或As) we were discussing, Mr. Smith came in.
b)如果when和before引导的从句位于主句之后，有时不能译成“当…时候” 和
“在…之前”，而要译成“就”、“才”、“这时”等。如：
The struggle lasted four years before the North won in the end.
He almost knocked me down before he saw me.

She had not been married many weeks when the man saw her and was struck
by her beauty.
I was walking in the street when I saw him.
c)by the time, each time, every time, immediately, the moment, the instant, the
minute, soon after, shortly after都可以作为连词，引导时间状语。如：
By the time he was fourteen, he had taught himself advanced mathematics.
Each time he came, he would call on me.
You must show him in immediately he comes.
I recognized him the moment I saw him.
d)by the time 的用法
the time+现在时，主句用将来完成时．例如：
By the time he arrives, we will already have left California.
the time+一般过去时，主句用过去完成时．例如：
By the time he arrived, we had already left California.
e)till和until
i.如果主句谓语动词是持续动词，通常用肯定式的主句，表示“直到…为止”。如：
I worked till (until) he came back.
ii.如果主句谓语动词是瞬间动词，则用否定式的主句表示“直到……才”。如：
I didn’t go to bed until (till) he came back.
iii.放在句首表示强调时一般用until。如：
Until he returns, nothing can be done.
注意：
Not until his mother called did he get up.
(不倒装为He didn’t get up until his mother called.)
It was not until his mother called that he got up.
(not until的强调结构为it iswas not until…that…)
f)before 的句型：
won’t be long before sb. does sth. 不用多久某人就会……
will be long before sb. does 要过很久某人才会……
was long before sb. did sth. 过很久某人才做……
will be + 一段时间+ before sb. does 某人要过多长时间才做
was +一段时间 + before sb. did sth. 某人过了多长时间才做
g)用no sooner …than 和 hardly…when 引导的从句表示“刚……就……”，主句
中的动词一般用过去完成时，从句用过去时若把no sooner, hardly 提到句首，
主句倒装例如：
He had no sooner got to the lab than he set out to do the experiment.
(该句倒装为：No sooner had he got to the lab than he set out to do the
experiment.)

h)时间状语从句中谓语动词不能用任何一种将来时，只能用现在时和过去时表示
将来 时。

3.地点状语从句:
通常由连词where和wherever等引导。如：
Go back where you came from.
Wherever you go, you must write to your parents.
Where there is a will, there is a way.
Where there is too much, the poison and waste may do great harm to the
things around us.

4.原因状语从句:
通常由连词：because, as, since, now that引导。
a)区别是:
because：表示“因 为”，直接而明确的原因和理由，语气最强，why提问的句子，
一般都用because回答。
He didn’t come because he was ill.
since：表示“既然”，语气比because弱。
Since you are here, you must do it.
as：表示“因为”语气比because轻，引导从句可放主句前也可放主句后。
You needn’t go with me, as you are busy.
As I was afraid, I hid myself.
now that意思与since相似，表示“既然”。
Now that you are in High School, you will probably spend more in reading.
Now that all the guests have arrived, let’s have our dinner.
b)注意：
i.在强调句中强调原因状语从句，只能用because引导，不可用as或since，如：
It was because he was ill that he didn’t go with us.
ii. because可以引导表语从句,而as, since不可以，这时主语一般都是it, this,
that
It’s because he is too lazy.
for:也表示“因为”，但是并连词，它连接的 不是状语从句，语气比较强。For引导
从句不说明主句发生的直接原因，只是提供一些补充说明，且不 位于句首．
It must be morning,for the birds are singing.
seeing that (既然) 和 in that (因为)
Seeing that the weather is bad, we’ll stay at home.
I like the city, but I like the country better in that I have more friends in the
country.

5.目的状语从句:
通常由that, so that, in order that, so…that, lest, in case（以防、免得）等引导：
He got up early in order that he could catch the early bus.
She married him so that she might tend and comfort him.
I explained again and again in case he should misunderstand me.
目的状语从句中谓语动词常含有may (might), can (could) should, will等情
态动词。
lest (以免，免得), for fear that
I hid the book lest (=for fear that) he should see it.

6.结果状语从句:
由that, so that, so…that, such…that引导：
It was very cold, so that the river froze.
The book is so written that it gives a quite wrong idea of the facts.
There were so many people (=such a lot of people) in the room that we could
not get in.
He made such an excellent speech that every one admired him.

7.条件状语从句:
由 if, unless, as long as (=so long as) (只要), in case (that) (如果,万一)等引导：
If plastics and rubber are burned, they give off poisonous gases.
Unless you work hard, you will fail,
You can go out, as long as (so long as ) you promise to be back before eleven.
In case I forget, please remind me about that.
注意：条件状语从句中的谓语动词的时态不可用将来时，只能用现在时态或过 去
时态表示将来时。

8.方式状语从句:
由连词：as, as if, as though引导：
The teacher told the students to do as he did.
Leave it as it is.
He heard a noise, as if someone was breathing.
I saw the man looking about him as if he wished to impress upon his mind
everything.
as if和as though意义和用法大致一样，引导的从句多用虚拟语气，但也可用陈
述语气。
He treats me as if I were his own son.

He walked as if he were drunk.

9.比较状语从句:
由连词as…as, not so(as) …as, than等引导：
I hope it was as good as the one you lent me.
Actually the ocean floor are almost as irregular as the exposed land area.
No one can be more fit for his office than he is.
He can’t run so fast as she.
注意：“the+比较级(接从句)，the +比较级(接主句)，这一句型也归在比较状语从
句内。如：
The more you study, the more you know.
The harder we work, the happier we feel.

10.让步状语从句:
由though, although, as (虽然尽管), even if, even though, wh-ever, no
matter-wh, whether引导.
Though he is old, yet he is active.
Although most of the people agreed, some were not willing to accepted.
Proud as the nobles are, he is afraid to see me.
We wouldn’t lose heart even if we should fail ten times.
Whenever (=no matter when) you call on me, you are always welcome.
Wherever (no matter where) you work, you can always find time to study.
Take the one you like best, whichever (no matter which) it is.
No matter what I say or how I say it, he always thinks I’m wrong.
Whether he comes or not, we’ll discuss the problem this afternoon.
评论|
0