as引导定语从句的用法 as 引导非限制性定语从句,可放在主句之前,或者主句之后,甚至可以切割一个主句;which引导的非限制性定语从句只能放在主句之后。另外,as有“正如,正像”的意思 (1) As is known to all, China is a developing country. (2) He is from the south, as we can see from his accent. (3) John, as you know, is a famous writer. (4) He has been to Paris more than several times, which I dont believe.=As 的用法例 1. the same as;suchas 中的as 是一种固定结构, 和一样。 I have got into the same trouble as he (has). 例2. as可引导非