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Not sure on the вокруг vs кругом

Увидеть because the whole event is wrapped up, seeing happens and it's over. Sort of like: he is not hoping to be seeing him, he's hoping TO SEE him, as a solitary...

Он не был там.
~He hasn't been there.

Его там не было
He wasn't there.

I'm not native Russian so I'm not 100% on that half of the discussion. Grain of salt recommended.

English doesn't distinguish between basically any of the Russian participles, all of the active...