have a discussion with sb about /against sthhave a discussion with sb about sthhave a discussion with sb against sth 这两个用法意思有什么不同啊?

问题描述:

have a discussion with sb about /against sth
have a discussion with sb about sth
have a discussion with sb against sth
这两个用法意思有什么不同啊?

是跟人讨论什么事
第二个是跟人讨论,不赞成什么事

前一个是跟人讨论什么事
第二个是跟人讨论,不赞成什么事