although一般放在比较正式的语气中，并且可用于倒装。although有“尽管；虽然；即使”的意思，引导的让步状语从句可放在主句之前，也可以放在主句之后，还可以放在句中。所以although引导让步状语从句的时候可以放在句中。
although的倒装用法
Although Tom was ill, he went on studying. =Illalthough Tom was, he went on studying.
虽然Tom病了，但他依然继续学习。
although引导让步状语从句
（1）Although Tom was ill, he went on studying.
尽管汤姆病了，他还是继续学习。
（2）Tom often go home to visit his parents although he is quite busy.
虽然Tom特别忙，但是他还是经常回家看望父母。
3.although引导的让步状语从句不能与but、however连用，需强调转折的时候，常使用yet, still, nevertheless代替。
（1）Although he is very old, (yet) he is quite strong.
他虽然年纪大了，身体还很健壮。
（2）Although he was exhausted, he(still) kept on working.
虽然他已经精疲力竭了，但他仍然继续工作。
