IRREGULAR VERBS IN THE PRETERITE
Many verbs do not follow the normal rules of conjugation in the preterite. These verbs are irregular in the preterite.
IR—to go fuimos fueron fui fuiste fue
SER—to be fui fuiste fue fuimos fueron
Meanings of IR (Pretérito) fui – I went fuimos – we went fuiste- you went fue – he went fueron – they went she went you all went you went
Meanings of SER (Pretérito) fui – I was fuimos – we were fuiste- you were fue – he was fueron – they were she was you all were you were
How do we know which verb is being used? The context in which each verb is used in the sentence will clarify the meaning. The verb ser is not used very often in the preterite tense.