I'm really glad to see you all here. It is indeed commendable that you got up so early in class.

我真的很高兴在这见到大家。你们起这么早来上课的确值得表扬。

He has acted with commendable speed.

他以值得称赞的速度付诸了行动。

Such initiative is highly commendable.

这种积极性是很可贵的。

Some of it, however, is commendable.

然而有些还是值得赞扬的。

Your persistence is commendable.

感谢您的坚持。