"First Conditional"

Simple present It uses when a situation is royal or possible.

Structure

If clause	Main clause
If + Present tense	will / can / may / must + verb

Examples

• If it rains today, I'll stay at home.
  Si llueve hoy, me quedaré en casa.
• If he is busy now, I will come back tomorrow.
  Si está ocupado ahora, regresaré mañana.
• If I have time, I'll visit my parents this afternoon.
  Si tengo tiempo, visitaré a mis padres esta tarde.