couldst
v. 能够（can 的过去式）
例句
How couldst thou come quicker than I?
你怎么能比我来得快呢？
How couldst thou forget thine own faults and busy thyself with the faults of others?
你怎么可以忘记自己的错误而忙于挑剔别人的过失呢?。
If only thou couldst see when the guilty ones will bend low their heads before their Lord, Our Lord!
假若你得见犯罪者在他们的主那里垂头丧气地说：我们的主啊！
