as和which引导定语从句,简单点讲解可不可总结为两点1.位置不同 2. 含...答:1.Which只能放在主句后面,而as引导的从句位置相对较灵活,可在前,可在中,也可在后。例如:A) As he realized, I was very useful to him.(在前)B) Air, as we know, is a gas.(在中)C) He was a foreigner,as I know from his accent.(在后)2.在which引导的定语从句中,谓语动词若是am, is, ...