DO you remember whether he came here?

问题描述:

DO you remember whether he came here?
of course I do .His father drove him here为什么DO you remember wheyther he 不能用whether

用whether不行.来不来不需要记忆吧?而且还是过去时,表明他已经来了,都来了,还问是否来?明白了没有?