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although和but不能同时使用，原因是：although为从属连词，引导让步状语从句，它表明整个句子为复合句，but 为从属连词，用以引导让步状语从句，它表明整个句子为复合句，不能同时用。
although的用法是什么
although引导的从句放在主句前后均可，不能与but、however连用。
1、although的意思是：虽然，尽管；但是，然而，较正式，语气强烈
He was in love with her, although a man seldom puts that name to what he feels.他爱上了她，虽然一个男人很少用这个词来形容他的感受。
2、although引导的从句放在主句前后、以及句中均可。
although放主语前的例句：
Although the diaminds areexpensive, they last forever and never go out of style.
尽管这些钻石贵，它们永远耐用并且永不过时。
although放主语后的例句：
It would appear that Milton has stopped addressing the muse, the Heavenly
Muse, and that he has begun addressing himself although that's unclear.
它所呈现的是弥尔顿已经不再跟缪斯讲话了，天国的缪斯，他已经开始跟自己讲话
了，尽管这不太确定。
although放句中的例句：
And it might turn out that although,normally, having what matters goes hand
in hand with surviving, logically speaking,they can come apart.
也许结论就是，虽然通常，拥有这些重要的东西和生存息息相关，逻辑上来说，它们是可以分开的。
3、Although引导的从句不能与but, however连用，一般要么存在Although，要么 存在however或者是but.
存在Although的例句：
He often helps me with my English although he is quite busy.
尽管他相当忙，但是还常常帮我学英语。
存在but的例句：The bike is rusty but usable. 自行车生锈了，但还能骑。
存在however的例句：
However hard she tried, nothing seemed to work.
无论她多么努力，好像都无济于事。
4、Although可与yet, still连用。
与yet连用的例句有：
Though she was busy with her work, yet she managed to find time to stay with her family。虽然她忙于工作，但她还是挤出时间与家人在一起。
与still连用的例句有：
Although still controversy is ceaseless, but the fact is more strong.
虽然仍争议不断，但事实更加有力。