Breakdown of Si hay una alerta, no debes salir.
un
a, an, some
no
no / not
salir
to go out, to leave / to appear, to come out (on the body)
si
if
deber
should, must (+ infinitive)
haber
there to be (existential)
la alerta
the alert
Questions & Answers about Si hay una alerta, no debes salir.
I know the subjunctive is used for hypothetical situations. Why is hay in the present indicative here?
In Spanish, you never use the present subjunctive directly after the word si (if). Because this is a highly likely or real condition, you use the present indicative (hay). You only use the subjunctive after si for unlikely or impossible situations, and in those cases, you must use the past subjunctive (for example, Si hubiera una alerta...).
What is the difference between saying no debes salir and no tienes que salir in this context?
I'm used to seeing the word alerta used without an article, like in the phrase estar alerta. Why does it take una here?
When you say estar alerta (to be on alert), the word alerta is acting as an invariable adjective or adverb. In this sentence, however, alerta is acting as a standard feminine noun meaning "a warning" or "an alert" (such as a weather or security alert), which is why it takes the feminine article una.
Would it be correct to say no debes de salir with the preposition de?
No, it wouldn't fit the meaning here. Deber followed directly by an infinitive (like salir) expresses obligation ("you must not"). If you use deber de + infinitive, it expresses an assumption or probability instead, meaning "you probably aren't going out" rather than giving an instruction.
Learn Si hay una alerta, no debes salir and more in Spanish
All course content and exercises are completely free — no paywalls, no trial periods, no signup needed.
- ✓ Practice with interactive exercises
- ✓ Track your progress with spaced repetition
- ✓Learn at your own pace — completely free