Cuando el cohete ilumine el cielo, todos aplaudirán.

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Breakdown of Cuando el cohete ilumine el cielo, todos aplaudirán.

• todos: everyone
• aplaudir: to applaud
• el cielo: the sky

Questions & Answers about Cuando el cohete ilumine el cielo, todos aplaudirán.

Why is ilumine used instead of ilumina?

Because in Spanish, when you have cuando introducing an action that will happen in the future, the verb in that subordinate clause must be in the present subjunctive. Here the event (“the rocket lighting up the sky”) is not a habitual fact but a future possibility. That’s why we say ilumine (present subjunctive) rather than ilumina (present indicative).

Why do we say aplaudirán instead of using the present tense?

The main clause describes what will happen after the rocket lights up the sky, so we need the simple future tense. Aplaudirán is the third-person plural of the future tense (they will applaud). If it were a habitual or general truth, you might use aplauden (present indicative), but here it’s a one-time future result.

What’s the rule for using cuando with the subjunctive?

When cuando refers to a future action or event that hasn’t occurred yet, Spanish requires the present subjunctive in the subordinate clause. Examples:
• Cuando llueva, te avisaré.
• Cuando llegue María, empezamos.
Once that action becomes certain or habitual, you switch to the indicative.

Why is there a comma after the subordinate clause (“Cuando el cohete ilumine el cielo, …”)?