She is very tall ,as is her mother.

一般我们as引导非限制性定语从句时,它指代的是上文提及的整个句子.在定语从句中可作,主语、表语、宾语等.She is very tall , as is her mother.这个句子中as不是指代一个句子,指代的是very tall,即：her mother is v...这个一个对等表语的问题，A=B，B=A，就像我们说的 i know who is he ，和 i know who he is 一样，两个都对。一般习惯用第一个。