although 和though用法上的区别是WHAT?

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...

although 多用于句首
though 多用于句中