Los verbos irregulares—El pretérito Ir, Ser, Tener, Estar, Hacer, Poder, Dar, Ver, Decir, Traer, Venir, Poner
Ir (to go) & Ser (to be) IR Fui (I went) Fuiste (you went) Fue (he/she/you went) Fuimos (we went) Fuisteis (you all went) Fueron (they/you all went) SER Fui (I was) Fuiste (you were) Fue (he/she/you was or were) Fuimos (we were) Fuisteis (you all were) Fueron (they/you all were)
Tener (to have) & Estar (to be) Have a similar change (UV) Tener Tuve (I had) Tuviste (you had) Tuvo (he/she/you had) Tuvimos (we had) Tuvisteis (you all had) Tuvieron (they/you had) Estar Estuve (I was) Estuviste (you were) Estuvo (he/she/you was or were) Estuvimos (we were) Estuvisteis (you all were) Estuvieron (they/you all were)
Hacer (to do or make) Hice (I did/made) Hicisite (you did/made) Hizo (he/she/you did or made) Hicimos (we did/made) Hicisteis (you all did/made) Hicieron (they/you all did or made) Pay special attention to the él/ella/Usted form. The Z pops up out of nowhere.
Poder (can or to be able to) Pude (I was able to) Pudiste (you were able to) Pudo (he/she/you was or were able to) Pudimos (we were able to) Pudisteis (you all were able to) Pudieron (they/you all were able to) Usually poder is followed by another verb in the infinitive. Ex: Pudimos ir al cine el fin de semana pasado. (We were able to go to the movies last weekend.)
Dar (to give) Di (I gave) Diste (you gave) Dio (he/she/you gave) Dimos (we gave) Disteis (you all gave) Dieron (they/you all gave) Ver (to see) looks just like dar in the preterite—just swap out the D for a V. vi, viste, vio, vimos, visteis, vieron
Decir (to say,tell) & Traer (to bring) Dije (I said/told) Dijiste (you said/told) Dijo (he/she/you said/told) Dijimos (we said/told) Dijisteis (you all said/told) Dijeron (you all said/told) Traje (I brought) Trajiste (You brought) Trajo (he/she/you brought) Trajimos (we brought) Trajisteis (you all brought) Trajeron (they/you all brought) Be careful with DIJERON and TRAJERON. The ending is just -ERON