如题所述
就是 could not ,can not ,would not 什么时候该用什么
could not would not 分别是can not \will not的过去式。can not 语气稍强点,不能,的意思。而will not表示对将来情况的否定。具体看其在语境中的意思。如he will not attend the party/ he can't come