present
I yawn
You yawn
He yawns
She yawns
It yawns
We yawn
They yawn
past
I yawned
You yawned
He yawned
She yawned
It yawned
We yawned
They yawned
future
I will yawn
You will yawn
He will yawn
She will yawn
It will yawn
We will yawn
They will yawn
conditional
I would yawn
You would yawn
He would yawn
She would yawn
It would yawn
We would yawn
They would yawn