ser

to be (permanent)

ser

i was

fui

you were

fuiste

he/she was

fue

we were

fuimos

they were

fueron

i used to be

era

you used to be

eras

he/she used to be

era

we used to be

éramos

you all used to be

erais

they used to be

eran

i would be

sería

you would be

serías

he/she would be

sería

we would be

seríamos

you all would be

seríais

they would be

serían

i will be

seré

you will be

serás

he/she will be

será

we will be

seremos

you all will be

seréis

they will be

serán

being (present participle)

siendo

been (past participle)

sido