1. 表示“虽然”时,不要根据汉语习惯,在后面使用连词 but, 不过有时它可与 yet, still, nevertheless 等副词连用。如:他虽然年纪很大了,但还很强壮。正:Although he is very old, (yet) he is quite strong. 正:误:Although he is very old, but he is quite strong. 但是在一定的上下文中,类似下面的 although 与 but 连用的句子是可能的 (注意 but 引出的句子在 although 从句之前) 。如:。如:But Ididn’t know that then, although I learned it later. 但我当时的确不知道此事,尽管后来还是知道了。

2. 有时用于主句之后,起补充说明的作用,相当于 however, but。如:He is poor-- although he is well contented. 他很穷,然而却能知足常乐。
The price increase will obviously be unpopular, although it’s unlikely to reduce demand. 价格升高显然会不受人欢迎,然而这不大可能会降低人们的需求。

 3. 若主从句主语相同,且从句谓语含有动词be, 可将从句主语和动词 be 省略。如:省略。如:Although (he is) quite young, he knows a lot. 虽然很年轻,但他很懂事了。
In any case, she was very lovablealthough not at all tidy. 不管怎么讲,她还是很可爱的,尽管一点也不爱干净。

 4. 不能用于 as though (好像),好像even though (即使) 等习语中代替 though, 也不用于让步状语的倒装形式中。