一个句子中不能同时出现although和but，所以用了although就不能用but。
although 英[ɔ:lˈðəu] 美[ɔlˈðo]
conj. 虽然; 尽管; 但是; 然而;
例句：
although i have many offers.
尽管我有很多机会。
although与though的用法区别
一、用作连词
表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式：
though [although] it was raining，we went there.虽然下着雨，但我们还是去了那儿。
though [although] it was barely four o’clock, thelights were already on. 尽管才四点钟，灯已经亮了。
though [although] we are poor, we are stillhappy. 我们虽然穷，仍然很快活。
二、用作副词
although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放在句首)，意为“可是”、“不过”：
it’s hard work，i enjoy itthough. 工作很辛苦，可是我乐意干。
he is looking fit, though. 但他看起来很健康。
you can count on him, though. 不过你可以指靠他。
三、用于习语
在 as though(好像，仿佛)，even though(即使，纵然)等固定短语中不能用 although：
she closed her eyes as though she weretired. 她闭上眼，仿佛很疲劳似的。
we felt as though we had witnessed thewhole thing. 我们感到仿佛目击了整个这件事似的。
he is an honest man, i must say, eventhough i have opposed him. 尽管我反对过他，我还得说他是一个诚实的人。
she was always afraid of men, even thoughshe had lots of boyfriends. 尽管她有很多男朋友，她总是害怕男人。
四、用于倒装
though 引导的让步状语从句可用部分倒装的形式(注意：倒装后位于句首的名词之前不用冠词)，但 although 一般不这样用：
poor though i am, i can afford it. 我虽穷，但这东西还是买得起的。
child though he was, he did quite well. 他虽是孩子，但干得很好。
虽然.
这个语法和中文不一样.
不能与but连用.
although用法：
1.although较正式,语气强
although he was tired,he went on working.
2.although引导的从句放在主句前后均可,有时还可放在句中.
although many difficulties are still ahead,we are determined to make greater achievements.尽管在前面的道路上还有许多困难,但是,我们决心要取得更大的成就.
he often he**s 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.
3.although引导的从句不能与but,however连用,但可与yet,still连用.不能说：although he was old,but he worked hard.应把but去掉.当然,保留but而去although也可.
注意:although 的几不:
although不能指假设的情况
although不能作并列连词
although不能作副词,放在词尾
