as可以引导定语从句吗? -凯发k8注册登录
as可以吗?
在从句中作主语、宾语或,意为“正如……,就像……,据……”。
从句位置可置于主句之前或之后,有时也可作为插入语置于句中,一般用逗号和主句隔开。
as we can see,
as can be seen,
as we know,
as is(well) known,
as may be imagined,
as often happens,
as has been said before,
as was mentioned above,
as is often the case,
as/indeed it is
1.引导限制性定语从句和非限制性定语从句
(1)as多与such或the same连用,可以代替先行词是人或物的名词。
(2)as 也可单独使用,引导非限制性定语从句,作用相当于which。例如:
the elephant’s nose is like a snake,as anybody can see.
(3)the same…that与the same…as在意思上是不同的。
2.as引导的非限制性定语从句的位置
as引导的非限制性定语从句位置较灵活,可以位于主句前面.中间或后面,一般用逗号与主句隔开,但which所引导的非限制性定语从句只能放在主句之后。例如:
(1) as is expected,the england team won the football match.
(2) the earth runs around the sun,as is known by everyone.
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