as从句问题,原来读到高一,对于as一窍不通!!答:as的这种用法常见于以下这些结构: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,etc.多看一些例句:As is well known,great changes have...