Until a pending or completed endpoint

Compare waiting for a future endpoint with recounting one that occurred.

The idea

After hasta que, use the subjunctive for a pending future endpoint and the indicative for a completed, asserted event.

Esperaremos hasta que abra la biblioteca.We will wait until the library opens.
Quédate aquí hasta que vuelva tu hermana.Stay here until your sister returns.
No serviremos la sopa hasta que lleguen todos.We will not serve the soup until everyone arrives.
Esperamos hasta que abrió la biblioteca.We waited until the library opened.
La música siguió hasta que terminó la fiesta.The music continued until the party ended.
El agua corrió hasta que cerraron el grifo.The water ran until they turned off the tap.

Read-aloud uses a synthetic Spanish voice available on your device. Voice quality and availability vary; it does not assess your pronunciation.

Do not select the mood from the main verb alone: ask whether the endpoint has occurred.

Choose the correct form: Esperaré hasta que ___ la película. (termine / termina)
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termine
termine is the pending end of the film.
Choose the correct form: Ayer esperamos hasta que ___ la lluvia. (paró / pare)
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paró
paró reports that the rain actually stopped.
Choose the correct form: No cenaremos hasta que ___ los invitados. (lleguen / llegan)
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lleguen
lleguen refers to guests whose arrival is still ahead.

Write one sentence about waiting tomorrow and one about waiting yesterday.