I know that he has tried hard; be that as it may, his work is just not good enough.

我知道他已经尽力了，尽管如此，他的工作仍不太理想。

《牛津词典》

However, because of his work to secure my rescue, I know what I can expect.

然而，因着他的工作我得以被救，我就知道我要得的了。

youdao

I don't know if he has done his work.

我不知道他是否把作业做完了。

youdao

I don't know if he has done his work.

我不知道他是否把作业做完了。

youdao