as引导限定性定语从句做的成分

在定语从句中,如果先行词是一个句子可以用as或which来引导。1）用which代替一个句子,只能放在主句后边,而且两个句子中间需要打逗点。eg:the earth goes around the sun,which is known to us all。地球绕着太阳转,这点大家都知道。2）用as代替一个句子,从句可以放在主句之前,主句之后,甚至还可以分割主句。eg:1。as is known to us all,the earth goes around the sun。地球绕着太阳转,这点大家都知道。2。John,as you know,is a writer。正如你所知,约翰是个作家。3）as作为关系代词用于the same。。。as; such。。。as 结构中。eg:1。this is the same book as you bought yesterday。这本书和你昨天买的相同。（表同一类事物）2。she is sunch a beautiful girl as we all like。她是这样一个我们都喜欢的漂亮姑娘。3。it wasn't such a good dinner as he had promised us。这顿晚餐不象他承诺的那样好。