present
I brief
You brief
He briefs
She briefs
It briefs
We brief
They brief
past
I briefed
You briefed
He briefed
She briefed
It briefed
We briefed
They briefed
future
I will brief
You will brief
He will brief
She will brief
It will brief
We will brief
They will brief
conditional
I would brief
You would brief
He would brief
She would brief
It would brief
We would brief
They would brief