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So he did; know it. So did he; have known about it So did he; know about it So he did; have known about it.
In case On condition So long as Now that
If I would have known it If I had have known it Had I known it Should I known it
will know know have known will have known
have known knew would know had known
have joined ; will know had joined ; would have known should join ; would know would join ; have known
should have known would have known could have known must have known
If I would have known If I had have known Had I known Should I know
will know know have known will have known
should have known should know must know must have known
would have known would know will know will have known
have ; known; have known did; know; knew did; know; have known have; known; knew
If I would have known it If I had have known it Had I known it should I know it
have known knew would know had known
So he has; so you have So he has; so have you So has he; so have you So has he; so you have