区别是什么?

although比较正式.而though最常用.一般可以互换

although一般置于句首
though一般置于句末

有共同之处，也有不同点。两都可用来引导让步状语从句，表示汉语的"虽然……但是……"。但不能说although / though...but...。如：不能说：Although / Though he is very old, but he is still quite strong. 句中的but 应去掉。Although是较为正式的用语，引导的从句多位于主句前，though多用于非正式文体中，引导的从句位于主句前后都可。

注意：though可用于倒装句中，although不可。如：Young though he is , he has worked for a few years.他虽然年轻但已经工作好几年了。

区别：①although和though同义，在一般情况下，可以互换使用。只是though较普遍，常用于非正式的口语或书面语中，而although则较为正式。另外although语气比though重，常用以强调让步概念。

e.g. Though/Although my car is very old, I don't want to buy a new one.

虽然我的汽车很旧，但我不想买一辆新的。

He insisted on doing it although I warned him not to.

虽然我警告他不要做，但他仍然坚持要做。

②even能和though组合表示强调，但even不能和although组合。因此，不能说even although,在这里even though=even if(no matter if; though即使……也……)

e.g. Even if/Even though we could afford it, we wouldn't go abroad for our vocation.

即使