why didn't you go to the movie yesterday?because i(had )seen it before.为什么不能用have

问题描述:

why didn't you go to the movie yesterday?because i(had )seen it before.为什么不能用have

如果用have,have seen是现在完成时,现在完成时表示动作从过去一直持续到现在,一般与since连用较多.比如:It is five years since he left.自从他走了(到现在为止)已经5年了.用had是过去完成时,一般在这样的题中都...