In Spanish, “a week ago” is usually “hace una semana,” with “la semana pasada” used when you’re pointing to last week on the calendar.
You’ll see two common options for “a week ago” in Spanish, and each fits a slightly different situation. If you learn both, you’ll sound natural in chats, class, and writing too.
This guide shows you the exact phrases, how to place them in a sentence, and the small grammar details that trip learners up. You’ll get ready-to-use examples you can copy and adjust.
What “A Week Ago” Means In Real Spanish
In English, “a week ago” can mean “seven days before now.” It can also mean “sometime during the previous week,” depending on context. Spanish keeps those meanings separate more often, so word choice matters.
If you mean a clean “seven days back,” Spanish uses the structure with hace. If you mean “last week” as a calendar block, Spanish often uses la semana pasada. Both can translate to “a week ago” in the right moment.
The Core Phrase: “Hace Una Semana”
Hace una semana plainly expresses “it makes one week,” meaning one week has passed since something happened. It’s the go-to for “a week ago” when you’re counting time back from now.
- Llegué hace una semana. I arrived a week ago.
- Empecé el curso hace una semana. I started the course a week ago.
- No lo veo hace una semana. I haven’t seen them for a week.
The Calendar Option: “La Semana Pasada”
La semana pasada means “last week.” Use it when the listener can think in calendar weeks, like Monday–Sunday. It fits stories, schedules, and anything tied to dates.
- La semana pasada tuve un examen. Last week I had an exam.
- Lo vi la semana pasada. I saw them last week.
- La semana pasada estuvimos en casa. Last week we were at home.
Taking “A Week Ago” In Your Spanish Sentence
Spanish time expressions are flexible, but two patterns show up the most. Pick one, then swap verbs and details to match your message.
Pattern 1: Verb + “hace” + time
This is the cleanest pattern for “ago.” Put the action first, then the time distance.
- Terminé el proyecto hace una semana.
- Conocí a mi profesor hace una semana.
- Salí de la oficina hace una semana.
Pattern 2: “Hace” + time + que + verb
This pattern frames the time as “it’s been X time since…” It’s common with routines and ongoing states.
- Hace una semana que no duermo bien. It’s been a week since I’ve slept well.
- Hace una semana que estudio para esta prueba. I’ve been studying for this test for a week.
- Hace una semana que vivimos aquí. We’ve lived here for a week.
Where “La Semana Pasada” Sits
La semana pasada can appear near the start or end of the sentence. Spanish often places it near what it modifies, so it feels tied to the action.
- La semana pasada empecé a leer este libro.
- Empecé a leer este libro la semana pasada.
Choosing The Right Phrase In Common Situations
Here are quick decision cues you can use without overthinking.
When You Mean Exactly Seven Days
Use hace una semana when you’re counting. If someone asks when you arrived, when you sent the email, or when you started a habit, this is the safe pick.
When You Mean “During Last Week”
Use la semana pasada when your story sits inside the last calendar week. If today is Thursday and you say la semana pasada, many listeners will think of Monday–Sunday of the prior week, not “seven days back.”
When You Want To Sound Casual
In daily speech, people may shorten or rearrange parts, but the base words stay the same. Get hace, the number, and the unit correct. Once that’s steady, your tone will take care of itself.
How It Sounds And How To Type It
Hace sounds like “AH-seh.” The h is silent, and the stress stays on the first syllable. Semana is “seh-MAH-nah,” and pasada is “pah-SAH-dah.” If you say these with calm, even rhythm, you’ll already sound smoother.
When you write, you can use straight quotes or curly quotes around English glosses; Spanish words don’t need quotes. In chat, many people skip accent marks on quick texts, but hace, semana, and pasada don’t need accents anyway, so you’re safe. If you’re typing in Spanish a lot, set a typing layout that makes ñ and accents easy, since other phrases do depend on them.
Table: Fast Ways To Talk About Past Time
Use this table as a menu. Swap the verb, keep the time phrase, and you’ve got a clean sentence.
| English idea | Spanish phrase | When it fits |
|---|---|---|
| a week ago (7 days) | hace una semana | Counting back from now |
| last week (calendar) | la semana pasada | Stories tied to last week |
| two weeks ago | hace dos semanas | Same structure, different number |
| a month ago | hace un mes | Months, not weeks |
| yesterday | ayer | One day back |
| the day before yesterday | anteayer | Two days back |
| recently | hace poco / recientemente | Vague recent past |
| last weekend | el fin de semana pasado | Weekend in the prior week |
| this past week | esta última semana | The week that just went by |
Little Grammar Details That Make You Sound Natural
Spanish time phrases are short, yet the grammar around them matters. These are the checks that save you from common slip-ups.
“Una Semana” Vs. “Un Semana”
Semana is feminine, so it takes una, not un. You’ll see un with masculine units like un mes and un año.
Plural Weeks: “Semanas”
Once you move past one week, Spanish uses the plural: hace dos semanas, hace tres semanas. Keep the number and the unit together.
Word Order With Pronouns
If you use object pronouns, place them where they normally go with the verb, not inside the time phrase.
- Lo envié hace una semana. I sent it a week ago.
- La vi la semana pasada. I saw her last week.
Talking About “For A Week” Vs. “A Week Ago”
English “for a week” describes duration, not distance in time. Spanish may still use hace in a different pattern, or it may use a plain duration phrase.
- Estudié por una semana. I studied for a week.
- Estudié hace una semana. I studied a week ago.
That second sentence can sound incomplete without a clearer time frame, so many speakers add a context clue, like what day it was or what happened next.
Table: Mistakes Learners Make And Clean Fixes
These are the errors that show up in writing and speech. Fixing them makes your Spanish clearer right away.
| What goes wrong | Better Spanish | Why it works |
|---|---|---|
| Using “un” with semana | hace una semana | Semana is feminine |
| Mixing “hace” and “pasada” | hace una semana / la semana pasada | Choose one meaning |
| Forgetting plural | hace dos semanas | Plural after 1 |
| Putting “hace” at the end | hace una semana que + verb | Needed for “it’s been…” |
| Using “desde” for “ago” | hace una semana | Desde means “since” |
| Overusing “recientemente” | hace una semana | Be specific |
| Dropping the article in “semana pasada” | la semana pasada | Sounds more complete |
Practice With Mini Dialogs You Can Reuse
Speaking gets easier when you’ve got ready chunks. Say these aloud, then swap in your own details.
If someone asks ¿Hace cuánto? they’re asking how long ago. Answer with hace + time: Hace una semana. For last-week timing, answer with La semana pasada. Add a day or date when clarity matters in writing and conversations.
At School Or In A Course
¿Cuándo empezaste?Empecé hace una semana.
¿Cómo te fue en el examen?La semana pasada fue difícil, pero pasé.
At Work Or In Messages
¿Ya enviaste el archivo?Sí, lo envié hace una semana.
¿Hablaste con Ana?La vi la semana pasada en la reunión.
With Friends
¿Cuándo llegaste a la ciudad?Llegué hace una semana.
¿Te acuerdas del plan?Claro, lo hablamos la semana pasada.
Quick Drills To Lock It In
Try these short drills. They’re small, but they work because you’re repeating the same structure with new content.
Drill 1: Swap The Verb
Say: “I started a week ago.” Now swap the verb: arrived, called, finished, learned, met.
- Empecé hace una semana.
- Llegué hace una semana.
- Llamé hace una semana.
- Terminé hace una semana.
- Aprendí hace una semana.
- Conocí a alguien hace una semana.
Drill 2: Swap The Number
Keep the pattern, change the number. One week, two weeks, three weeks, four weeks.
- hace una semana
- hace dos semanas
- hace tres semanas
- hace cuatro semanas
Drill 3: Tie It To A Day
Add a day to remove any doubt. This helps in writing, and it helps listeners track your timeline.
- Llegué hace una semana, el martes.
- La semana pasada, el jueves, tuvimos clase extra.
When You Should Avoid A Direct Translation
Some learners try to build “a week ago” word by word, like un semana atrás. You might hear atrás in casual speech, but it’s not the clean default for learners. If you stick to hace una semana and la semana pasada, you’ll be understood across Spanish-speaking regions.
Also watch out for English habits like “since a week.” Spanish has desde for “since,” but it doesn’t mean “ago.” If you mean “ago,” reach for hace.
A Simple Checklist Before You Hit Send
- If you mean “seven days back,” use hace una semana.
- If you mean “during last week,” use la semana pasada.
- Match gender: una semana.
- Plural after one: dos semanas, tres semanas.
- For “it’s been a week since…,” use Hace una semana que + verb.
How To Say ‘A Week Ago’ In Spanish
If you want one phrase to start with, choose hace una semana. It handles the “ago” meaning cleanly and works in most daily sentences. Add la semana pasada when you’re talking about the last calendar week, like a story about classes, work, or plans.
Say each option a few times out loud. Then use it once in a message today. That single use turns it from a memorized line into a real habit.