Word/Phrase: if
Translation: si
Pronunciation: /si/
If it rains, we will stay inside - Si llueve, nos quedaremos adentro.
If you see her, tell her I said hi - Si la ves, dile que le dije hola.
If I were you, I would go - Si yo fuera tú, iría.
If he calls, let me know - Si él llama, avísame.
If they arrive early, we can start - Si llegan temprano, podemos empezar.