此类连词主要有although, though, as, even if, even though, no matter what等。
Though my father is old, yet he wants to do something for our country.
Even if there are difficulties， we must do it well. 即使有困难，我们也要把工作做好。
Young as I am, I know some of the family secrets. 尽管我年龄小，我知道一些家庭秘密。
Nobody believed him no matter what he said. 不管他说什么每人相信他。
Much as I have travelled, I have never seen anyone who’s as capable as John.