有一读者问： 有这样一句话：
(1)She had never read that passage before that she could remember.
如何理解before that she could remember? 介词before可后接一宾语从句吗？
before在此不是介词，而是副词，意为“在以前”。that在此意为as far as, that she could remember意为“就她记忆所及”。that=as far as的情况还有如我们常见到的：
(2)Not that I know of. （=就我所知，不是这样）
