present
I know
You know
He knows
She knows
It knows
We know
They know
past
I knew
You knew
He knew
She knew
It knew
We knew
They knew
future
I will know
You will know
He will know
She will know
It will know
We will know
They will know
conditional
I would know
You would know
He would know
She would know
It would know
We would know
They would know