| First | if + present | will + base |
| Second | if + past | would + base |
| Third | if + past perfect | would have + part. |
| posible | hoy o mañana | |
| imaginario | ahora | |
| imposible | ya pasó |
"If schools started later, students would sleep better," argued Laura. "But if we finished later, we would have less free time," replied Andrés. "If I were the principal, I would try it for one month."