if

used to introduce a condition or possibility

si, en caso de que

• if + present simple

Collocations if it rains · if you come

• If it's sunny, we'll go to the beach.

  Si hace sol, iremos a la playa.

used to introduce an unlikely or impossible situation

si (hipotético)

• if + past simple

Collocations if I were you · if he had come

• If I were a bird, I could fly.

  Si fuera un pájaro, podría volar.

used to give advice or make suggestions

si (sugerencia)

• if + present simple

Collocations if you want · if you need

• If you're hungry, have some food.

  Si tienes hambre, come algo.

used to introduce a negative condition or possibility

si no

• if not

Collocations if not now · if not today

• If not, we'll go another day.

  Si no, iremos otro día.

used to introduce a question or request for information

¿y si?

• if + present simple

Collocations what if · how if

• What if it doesn't work?

  ¿Y si no funciona?

used to introduce a past hypothetical situation

si (pasado hipotético)

• if + past perfect

Collocations if I had known · if she had gone

• If you had told me, I would have helped.

  Si me lo hubieras dicho, te habría ayudado.

used to introduce a future hypothetical situation

si (futuro hipotético)

• if + would

Collocations if I were to go · if she was to come

• If you were to visit, we could see a movie.

  Si fueras a visitar, podríamos ver una película.

used to introduce the result of a past hypothetical situation

si (pasado hipotético resultado)

• if + would have

Collocations if I had gone, I would have seen · if she had come, we would have met

• If you had called me, I would have answered.

  Si me hubieras llamado, habría respondido.