How Do You Say Didn’t In Spanish? | Past Negation Made Clear

In Spanish, “didn’t” is usually formed by placing no before a past-tense verb, like no fui, no comí, or no quiso.

“Didn’t” looks like one neat word in English. Spanish doesn’t package it that way. Instead, it builds the same meaning with two parts: a negative word and a verb form that already shows the past.

That’s the whole trick. Once you get that, Spanish past negatives stop feeling slippery. You’re not hunting for one magic translation. You’re choosing the right past tense, then placing no in front of it.

So if you want to say “I didn’t go,” you don’t search for a Spanish word that equals “didn’t.” You say no fui. For “she didn’t eat,” you say no comió. For “they didn’t want to,” you say no quisieron.

That pattern works across daily speech, writing, classwork, and travel phrases. The hard part isn’t the negation. It’s picking the tense that matches what you mean. This article clears that up, shows the patterns that matter most, and helps you stop making the same two or three mistakes that trip up nearly everyone at the start.

Why Spanish Doesn’t Have One Single Word For “Didn’t”

English packs tense and negation into one helper construction: “did not” or “didn’t.” Spanish doesn’t do that in the same way. The negative part is usually no, and the verb itself carries the past meaning.

That means “didn’t” can turn into lots of Spanish forms, based on who did the action and what verb you need. “I didn’t speak” is no hablé. “You didn’t speak” is no hablaste. “We didn’t speak” is no hablamos. The negative stays put. The verb changes.

This is why direct word-for-word translation causes trouble. Learners often try to force Spanish into an English mold, then wonder why nothing sounds right. Spanish is simpler here than it first appears: negate first, then conjugate with care.

How Do You Say Didn’t In Spanish? In Real Sentences

The most common pattern is this:

no + past-tense verb

Here are a few clean examples:

• I didn’t go = No fui
• I didn’t eat = No comí
• She didn’t call = No llamó
• We didn’t see it = No lo vimos
• They didn’t arrive = No llegaron

Notice what stays fixed: no. Notice what changes: the verb ending. That one detail does most of the work.

According to the RAE’s entry on no, this negative adverb normally goes before the verb. That’s the rule behind forms like no fui and no comió. It sounds small, but word order matters here. Fui no is not Spanish.

Once you lock in that order, your next choice is tense. That’s where learners drift into trouble, since English “didn’t” can map to more than one past tense in Spanish.

Choosing The Right Past Tense

Pretérito For Completed Actions

Use the pretérito when you mean a finished action at a clear point in the past. This is the most common match for English “didn’t” in short statements.

No estudié anoche. = I didn’t study last night.
No compraron pan. = They didn’t buy bread.
No llegaste a tiempo. = You didn’t arrive on time.

The RAE description of the pretérito perfecto simple ties this tense to actions placed in a completed stretch of the past. That fits many English “didn’t” sentences, especially when the time frame feels closed: yesterday, last night, last year, at noon, after class.

Imperfecto For Habit, Background, Or Ongoing Past

Sometimes “didn’t” points to an ongoing past state or a repeated action, not one finished event. In those cases, the imperfecto may be the better fit.

No comía carne. = I didn’t eat meat.
No iba mucho allí. = I didn’t go there much.
No lo sabía. = I didn’t know it.

These don’t feel like one-time actions. They sound open-ended, habitual, or descriptive. English hides that distinction. Spanish makes you pick.

Why This Matters

If you say no supe and no sabía, you are not saying the same thing. One points to a completed moment of not finding out. The other describes not knowing. That’s why “didn’t” by itself never tells you the whole story in Spanish.

The good news? In plain, everyday sentences, the pretérito is often the right answer. Start there when the action happened and ended.

Common Forms You’ll Use All The Time

Past negatives become much easier once you’ve seen the same shapes a few times. The table below gives you common English sentences, natural Spanish versions, and a quick usage note.

English Sentence	Spanish	Usage Note
I didn’t go	No fui	Finished action in the past
I didn’t eat	No comí	One completed action
He didn’t call	No llamó	Single event
We didn’t see it	No lo vimos	Object pronoun goes before the verb
They didn’t want to leave	No quisieron salir	Main verb is conjugated, second verb stays in infinitive
I didn’t know	No sabía / No supe	Meaning shifts with tense choice
She didn’t use to work here	No trabajaba aquí	Habit or background in the past
You didn’t understand me	No me entendiste	Indirect object pronoun comes before the verb

Where Learners Slip Up

Trying To Translate “Did” By Itself

Many learners search for a Spanish word that equals “did” and then try to negate it. That usually leads nowhere. Spanish past statements don’t need a helper verb in the English style. You say no hablé, not some version of “I did not speak” built word by word.

Using No In The Wrong Spot

No usually goes right before the conjugated verb: no fui, no vino, no lo vi. When object pronouns show up, the pronoun sits between no and the verb only if the pronoun naturally comes before that verb: no lo vi, no me llamó.

You can check full verb patterns in the RAE conjugation tables, which are handy when an irregular form throws you off. That’s where forms like fui, tuve, and quise stop feeling random and start looking organized.

Picking The Wrong Tense For “Know,” “Want,” Or “Could”

Some verbs change feel a lot depending on the past tense. No podía often means “I couldn’t” in an ongoing sense. No pude usually means “I wasn’t able to” at a finished moment. No quería and no quiso are another pair where the choice shifts the sentence.

If a sentence feels like a snapshot, the pretérito is often right. If it feels like background or habit, the imperfecto may fit better.

Easy Sentence Patterns That Sound Natural

Subject Often Drops Out

Spanish often leaves out the subject pronoun because the verb ending already tells you who did the action.

No fui. works on its own.
Yo no fui. adds stress, contrast, or correction.

That’s why many clean translations sound shorter than English ones.

Time Words Make Your Meaning Cleaner

Add a time phrase and your tense choice gets easier.

• No fui ayer. = I didn’t go yesterday.
• No comimos anoche. = We didn’t eat last night.
• No iba allí cuando era niño. = I didn’t go there when I was a child.

When the time frame is closed, the pretérito usually feels natural. When the sentence paints an old habit or background state, the imperfecto often sounds better.

Infinitives Stay In Their Base Form

When two verbs appear, only the first one is conjugated.

No quise salir. = I didn’t want to leave.
No pudieron entrar. = They didn’t manage to enter.
No decidimos comprarlo. = We didn’t decide to buy it.

That pattern saves a lot of effort once you spot it.

How Native Use Varies By Region

Spanish changes from place to place, and that shows up in past tenses too. In some areas, speakers favor the simple past where others may lean on the present perfect in nearby contexts. The Instituto Cervantes material on the pretérito indefinido and other teaching resources help frame that pattern for learners.

Still, the answer to the core question stays the same: “didn’t” is usually no plus the right past verb form. Regional habits change which tense feels most natural in certain settings, but they do not replace that structure.

Common Mistake	Better Spanish	Why It Works
No did comer	No comí	Spanish does not use a helper like English “did” here
Fui no	No fui	No goes before the conjugated verb
No sabía ayer for one finished event	No supe ayer	Pretérito marks a completed moment
No quise fui	No quise ir	Second verb stays in infinitive
No lo vi ayer nunca	No lo vi ayer / Nunca lo vi	Cleaner word order gives the sentence a natural flow

A Fast Way To Build The Right Form

Step 1: Pick The Verb

Start with the action: go, eat, know, call, want, see.

Step 2: Choose The Past Tense

Ask one plain question: was this a finished action, or was it an ongoing state, habit, or background scene?

Finished action: use pretérito.
Ongoing state or habit: use imperfecto.

Step 3: Put No Before The Conjugated Verb

That’s your negative. Nothing fancy. Just place it before the verb.

Comí becomes no comí.
Sabía becomes no sabía.
Pudieron becomes no pudieron.

Step 4: Add Pronouns Or Time Phrases If Needed

No lo vi.
No me llamó anoche.
No quisimos salir temprano.

That four-step pattern gets you through a huge share of daily sentences.

Mini Cheat Sheet You’ll Actually Recall

If you need a quick mental reference, this is the one worth storing:

• didn’t go = no fui
• didn’t eat = no comí
• didn’t see = no vi
• didn’t want = no quise or no quería, based on meaning
• didn’t know = no supe or no sabía, based on meaning

That last point matters most. “Didn’t” is not one Spanish word. It is a pattern. Once you stop searching for a single equivalent and start building the sentence around no plus the right past tense, your Spanish gets cleaner on the spot.

If you want the shortest usable answer, here it is: say no and then the past form of the verb you need. That’s the engine behind nearly every natural translation.