Question 1

Why does Avísanos have an accent on the í?

Accepted Answer

Because it’s an affirmative command with an attached pronoun. The base command is tú: avisa. When you attach the clitic pronoun nos, the stress must stay on VI, so a written accent is added: a-VÍ-sa-nos → Avísanos. Other examples: Dímelo, Háblame, Síguenos.

Question 2

Why is the pronoun at the end? What happens in the negative?

Accepted Answer

In Spanish, object pronouns attach to the end of affirmative commands, but go before the verb in negative commands.
- Affirmative: Avísanos si…
- Negative: No nos avises si…
You can also use a neutral present instead of a command: Nos avisas si… (softer tone).

Question 3

Can I say Nos avisas si hay cambios en el horario instead? Is there a difference?

Accepted Answer

Yes. Nos avisas si… is very common in Latin America; it sounds slightly softer and more conversational than the imperative Avísanos…, but both are perfectly correct.

Question 4

How do I say it formally (usted/ustedes)?

Accepted Answer

- Formal singular (usted): Avísenos si hay cambios en el horario.
- Formal plural (ustedes): Avísennos si hay cambios en el horario.
Note the accent to keep the stress, and the double n in the ustedes form.

Question 5

What if I use vos (e.g., Argentina, Uruguay)?

Accepted Answer

With voseo the command is avisá. When you attach nos, the default stress already falls where we want it, so no extra accent is needed: Avisanos si hay cambios en el horario. (Contrast with tuteo: Avísanos.)

Question 6

Is nos a direct or an indirect object here?

Accepted Answer

Indirect. With avisar, the person informed is the indirect object: “avisar a alguien de algo.” Here, nos = “to us.” Example with a noun phrase: Avísanos de cualquier cambio.

Question 7

Do I need de here? Should it be Avísanos de los cambios…?

Accepted Answer

Use:
- Avísanos si hay cambios… when what follows is a clause (“if there are changes…”).
- Avísanos de cualquier cambio… when what follows is a noun phrase.
Avoid mixing them: not “avísanos de si hay cambios.”

Question 8

Why si hay and not si haya?

Accepted Answer

After si (if) to express a real/likely condition, Spanish uses the present indicative: si hay. Subjunctive (haya) appears after other expressions like en caso de que haya or in contrary-to-fact conditions with past forms (si hubiera).

Question 9

Is horario the right word for “schedule”?

Accepted Answer

Yes. Horario covers “schedule/timetable” (class schedule, work hours, opening hours). For travel plans use itinerario, for a TV lineup programación, and agenda is a planner/diary, not a “schedule” in general.

Question 10

“Cambios en el horario” vs “cambios de horario” — which should I use?

Accepted Answer

Both are idiomatic.
- Cambios de horario = “schedule changes” (generic).
- Cambios en el horario = “changes in the schedule” (the specific schedule we’re talking about).
Either is fine here.

Question 11

Could I say “Let us know” with other verbs?

Accepted Answer

Yes:
- Neutral/polite: Haznos saber si hay cambios…
- More formal: Infórmanos si hay cambios…
- Bureaucratic/legal: Notifícanos si hay cambios…
Everyday speech across Latin America favors avísanos.

Question 12

How do I say “Let me/him/her/them know”?

Accepted Answer

- Me: Avísame.
- Him/Her (tú): Avísale. (formal usted: Avísele)
- Them (tú): Avísales. (formal ustedes: Avíseles)
Remember with avisar these are indirect objects (le/les).

Question 13

Does si need an accent here?

Accepted Answer

No. Si without an accent means “if.” The accented sí means “yes.” Here it’s the conditional “if,” so si.

Avísanos si hay cambios en el horario.

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