The verb byť (to be)

Past tense

Singular Plural
ja som bol(a)
I was
my sme boli
we were
ty si bol(a)
you were (informal/singular)
vy ste boli
you were (formal/plural)
on bol / ona bola / ono bolo
he was / she was / it was
oni/ony boli
they were

Present tense

Singular Plural
ja som
I am
my sme
we are
ty si
you are (informal/singular)
vy ste
you are (formal/plural)
on/ona/ono je
he/she/it is
oni/ony sú
they are

Future tense

Singular Plural
ja budem
I will be
my budeme
we will be
ty budeš
you will be (informal/singular)
vy budete
you will be (formal/plural)
on/ona/ono bude
he/she/it will be
oni/ony budú
they will be