present
I sign
You sign
He signs
She signs
It signs
We sign
They sign
past
I signed
You signed
He signed
She signed
It signed
We signed
They signed
future
I will sign
You will sign
He will sign
She will sign
It will sign
We will sign
They will sign
conditional
I would sign
You would sign
He would sign
She would sign
It would sign
We would sign
They would sign