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, the lights were already on. 尽管才四点钟，灯已经亮了。
Though / Although we are poor, we are still happy. 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 it though. 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 were tired. 她闭上眼，仿佛很疲劳似的。
We felt as though we had witnessed the whole 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, even though 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 though she had lots of boyfriends.尽管她有很多男朋友，她总是害怕男人。
