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10
逻辑关系（
Logical
relations
）
(61)
原因和结果
表原因的词
：
because,
since, as, for, because of
表结果的词：
so
一、原因状语从句
(1)
原因状语从句通常由
because, since, as,
for
引导。
(2)because
表示直接原因，
语气最强。
回答由
why
提出的问题，
只能用
because
。
此外，
be
cause
和
so
不能同用在一个句子
里。
eg
：
------Why were
you late for school?------Because I got up late. <
/p>
since
引导原因状语从句，相当于
n
ow that
，意思是
“
因为
……
，既然
……
，<
/p>
鉴于
……”
。
eg
：
Since the rain
has stopped
，
let’s go for a
walk.
既然雨停了，我们出去散散步吧。
as
和
si
nce
语气较弱，
一般用来表示明显的原因。
< br>由
as
和
since
引导的原因状语从居多放
在句首。
例如
：
As
he has no car, he can’t get there
easily.
Since we have
no
money, we can’t buy it.
(3)f
or
表示所说的理由是一种补充说明
,for
< br>引导的从句一般不放在句子的开头。如
:
I
decided to stop and have lunch, for I was feeling
quite hungry.
练习：
I was late for class yesterday _______
there was something wrong with my bike.
He took off his coat _______ he felt
hot.
you can’t
answer the question, I’ll ask someone
else.
________the bad weather, we missed the
train.
二、结果状语从句
(
1)
结果状语从句由
so…that, such…that,
so that
引导。
(2)
在由
so...that
引导的结果状语从句
其结构是
: “...so +
形容词（副词）
+ that +
从句
”
。
Eg.
He was so
glad that he couldn’t say a
word.
Liping runs so fast that we
can
’
t catch up with him.
在由
such…that
引导的结果状语从句
其结构是
: “...such
+a / an +
形容词
+
名词<
/p>
+ that +
从句
”
。
eg
：
It
was such a hot day that nobody wanted to do
anything.
He had such long arms that he
could almost touch the
ceiling.
（天花板）
有时
so…that
和
such...that
可以互换。
Eg
：
It was such a wonderful film that all
of us wanted to see it again.
=It was
so wonderful a film that all of us wanted to see
it again.
(3)
如果名词前由
many,
much, little,
few
等词修饰时，只能用
so,
不
用
such
。
eg
：
Soon there
were so many deer that they ate up all the wild
roses.
He has so little time that
he can’t go to the cinema with you.
(4)
如果主从句的主语相同，并且从句是否定的形式，可以用
too...to...
句型转化。
eg
：
He was so
excited that he couldn't go to sleep that night.
= He was too excited to go
to sleep.
(5)
如果主从句的主语相同，但从句是
肯定的形式，可以用
adj.+
enough
替换。
eg
：
He is so old
that he could go to school.
= He is old enough to go to school.
他够大了，可以去上学。
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