You are
Es
I am
Sum
He is
Est
We are
Sumus
You all are
Estis
They are
Sunt
I was
Eram
You were
Eras
He was
Erat
We were
Eramus
You all were
Eratis
They were
Erant
I have been
Fui
You have been
Fuisti
He has been
Fuit
We have been
Fuimus
You all have been
Fuistis
They have been
Fuerunt
I am able
Possum
You are able
Potes
He can
Potest
We are able
Possumus
You all are able
Potestis
They can
Possunt