I didn't notice him leaving.

我没看到他离开。

《牛津词典》

I saw him leaving the gymnasium.

我看见他从体育馆出来。

youdao

I noticed him leaving the party in a hurry.

我看见他匆匆地离开了晚会。

youdao

But this does not stop him from working. He says that he is leaving a gift to the city with his art.

VOA: special.2009.04.08

Haze drove on, leaving the man who has helped him: "The blinding white cloud had turned into a bird with long, thin wings and was disappearing in the opposite direction."

海斯继续开车，离开了那位帮助他的男人：,那朵亮白的云转变成了一只有这长而瘦的羽翼的小鸟的形状,消失在另一个方向“

耶鲁公开课 - 1945年后的美国小说课程节选

I told him the same thingthat my mom told him when she was leaving him.

VOA: standard.other

Further attempts to restrain Fr Boff led to him leaving the priesthood in 1992.

BBC: New Pope seeks to heal divisions in Latin America

And the last thing that bothers me is the issue of him leaving his cell phone.

FORBES: Strauss-Kahn (Or Powerful Men Who Do Something Stupid)

The girl said she was told to say he had not been there prior to him leaving.

BBC: Girl, 12, forced to watch Mohammed Noor's brutal murder