and ,but ,so ,although ,though ,however 用法的区别,哪些要加逗号的?

题目

and ,but ,so ,although ,though ,however 用法的区别,哪些要加逗号的?
例句：
I drank the beer ______ I didn’t want it.
I didn’t want the beer ,______I drank it.
I didn’t want the beer.I drank it,______.
I didn’t want the beer.______ ,I drank it.
I didn’t want the beer ,______I didn’t drink it.
I wanted the beer ______ I drank it.
注意标点的变化。
（只能用一次）

答案

只有however 加其他都不加
and,but so ,although ,though 前面可以加后面不能加 although ,though 因为引导状语从句不加and,but引导并列从句不加.
答案依次是though、and、however、however、so、and.