Color Key
| Regular | Irregular |
| Ortho. Change | Not Used |
chiflar
to whistle, to hiss; to boo; to drive crazy
Preterite (Past) Tense / Pretérito (Pretérito Perfecto Simple)
| yo | chiflé |
| tú | chiflaste |
| él / Ud. | chifló |
| nosotros | chiflamos |
| vosotros | chiflasteis |
| ellos / Uds. | chiflaron |