It might help us to know what the context of this problem is
For some reason the first one doesn't seem natural to me. I even doubt the use of 'to' here. Do you also find anything peculiar with it? I've given my version below.
1: It might help us to know what the context of this problem is. 2: It might help us if we know what the context of this problem is.
Top answer
Both are fine and common in my book.
— Mister Micawber
Both are fine and common in my book.
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