though

ad. 可是,然而,不过
conj. 尽管,虽然
prep. 但.

I don't know him well though I've known him for a long time.

我对他并不了解，虽然我认识他已经很长时间了。

He said he would come, he didn't, though.

他说他要来，可是并没有来。