Although和but都可以用来表示转折关系,但它们的用法有所不同,Although通常用于引导让步状语从句,表示虽然某种情况存在,但主句仍然成立;而but则用于连接两个独立的句子,表示前后句之间存在对比或转折关系。“Although it was raining, he still went out.”(尽管下雨,他还是出去了。)“I want to go out, but it's too cold.”(我想出去,可是太冷了。)