不要按汉语“虽然……但是……”的表达习惯，在 although 后连用 but。如：

虽然天很冷，但我们还是去了那儿。

正：Although it was cold, we went there.

误：Although it was cold, but we went there.

但是在强调时，although 可与 yet, still 等副词连用。如：

Though he seems happy, yet he is worried. 虽然他看起来很幸福，但他实际上很烦恼。

值得一提的是，在某些特定的语境中，although 与 but 连用的句子是可能的(注：but 引出的句子在 although 从句之前)。如：

But I didn’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。

He wanted to go abroad, but although he had some money he couldn’t afford it. 他想出国，尽管他有些钱，但还是负担不起。

二、although与though的区别

1. 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。如：

Though [Although] it was raining，we went there. 虽然下着雨，但我们还是去了那儿。

2. 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”。如：

It’s hard work; I enjoy it though. 工作很辛苦，可是我乐意干。

这样用的 though 有时可与 however 换用。如：

We all tried our best. We lost the game, though [however]. 我们都已尽了最大的力量，但我们还是输了。

3. 在 as though(好像，仿佛), even though(即使，纵然) 等固定短语中不能用 although。如：

He talks as though he knew anything. 他夸夸其谈好像无所不知。

4. 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。