关系代词as 引导的定语从句
as
1.as 可以在定语从句中做主语或宾语,代表前面整个句子.如：
He married her,as was natural.他跟她结婚了,这是很自然的事.
He is honest,as we can see.他很诚实,这一点我们看得出来.
2.as 引导的非限制性定语从句可以放在主句之前、主句之后,甚至还可以分割主句.另外,as 常常有“正如、正像”的含义.如：
As is known to all,China is a developing country.众所周知,中国是发展中国家.
He is from the south,as we can know from his accent.他是南方人,这一点我们从他的口音可以知道.
John,as you know,is a famous writer.正如你所知,约翰是个著名作家.
1.当先行词受such,the same 修饰时,关系词常用as.如：
I’ve never heard such stories as he tells.我从未听过象他讲的这样的故事.
He is not such a fool as he looks.他可不象他看上去的那样傻.
This is the same dictionary as I lost last week.这部词典跟我上星期丢失的一样.
注意：当先行词受the same 修饰时,偶尔也用 that引导定语从句,但与as引导的定语从句意思有区别.如：
She wore the same dress that she wore at Mary’s wedding.她穿着她在玛丽婚礼上穿过的同一条连衣裙.
She wore the same dress as her younger sister wore.她穿着跟她妹妹所穿的一样的连衣裙.
