present
I serve
You serve
He serves
She serves
It serves
We serve
They serve
past
I served
You served
He served
She served
It served
We served
They served
future
I will serve
You will serve
He will serve
She will serve
It will serve
We will serve
They will serve
conditional
I would serve
You would serve
He would serve
She would serve
It would serve
We would serve
They would serve