1 . 虽然
常用的关连词有:though(虽然), although(虽然),as(尽管,虽然), even if (即使), even thoug.
2 . 尽管
...我们可以看出,学习让步状语从句的关键是关联词的选用;其次,要注意的是由as引导的让步状语从句要用倒装语序。让步状语从句表示:虽然,尽管,即使等概念,由although,though(尽管,即使),however(无论怎样),whatever(无论什么),whoever(无论谁),whomever(无论谁),whichever(无论哪个),whenever(无论何时),wherever(无论哪里),wh.
3 . 但
161.though虽然;尽管;但162.
4 . 不过
I probably loosened it up 4 uthough不过,弄松Oogway was a crazy old turtle after all