What Deber Means In Spanish

Pattern	English Meaning	What It Usually Does	Example
deber + infinitive	must / have to	Shows obligation or responsibility	Debo estudiar. = I must study.
debería + infinitive	should / ought to	Gives advice or a softer obligation	Deberías dormir más. = You should sleep more.
deber de + infinitive	must be / probably	Makes a guess or deduction	Debe de estar en casa. = He must be at home.
deber + noun / pronoun	to owe	Talks about debt or something owed	Le debo cien pesos a Ana. = I owe Ana 100 pesos.
debería haber + participle	should have	Talks about regret in the past	Debería haber salido antes. = I should have left earlier.

Present Tense: The Forms You Actually Need

Deber is a regular -er verb, so its present tense is friendly for once. A tiny miracle.

Subject	Form	English
yo	debo	I must / I owe
tú	debes	you must
él / ella / usted	debe	he, she, you must
nosotros / nosotras	debemos	we must
ustedes	deben	you all must

In Mexican Spanish, ustedes is the normal plural you. You do not need vosotros for everyday Mexico-focused Spanish.

Six Deber Phrases You Will Use All The Time

Deber + Infinitive: Must, Have To, Or Ought To

This is the most common structure: deber + infinitive. It often expresses duty, necessity, or a fairly strong idea of what someone is supposed to do.

• Debes llegar a tiempo. = You must arrive on time.
• Debo llamar a mi mamá. = I need to call my mom.
• Debemos cuidar el agua. = We should take care of water.
• No debes fumar aquí. = You must not smoke here.

Notice how English bounces between must, have to, and should. Spanish does not panic about this. Context does the heavy lifting.

When It Feels Stronger

If the rule is strict or the situation is serious, deber can sound closer to must.

• Debes usar cinturón de seguridad. = You must wear a seat belt.
• Los pacientes deben esperar aquí. = Patients must wait here.

When It Feels Softer

In advice, parenting, health, or polite suggestions, it often lands closer to should.

• Debes tomar más agua. = You should drink more water.
• Debes hablar con ella con calma. = You should talk to her calmly.

Debería + Infinitive: The Cleanest Way To Say Should

If you want a safe, easy translation of should, use debería + infinitive. This is the conditional form of deber, and it is great for advice, recommendations, and gentle criticism.

Spanish	English Meaning	Example Sentence
debería comer	should eat	Deberías comer antes de salir. = You should eat before leaving.
debería ir	should go	Deberíamos ir en taxi. = We should go by taxi.
no debería decir	should not say	No deberías decir eso en una entrevista. = You should not say that in an interview.

That little accent mark in debería matters, so do not ghost it. It is doing real work.

Deber De + Infinitive: Making A Guess

Now for the version that confuses nearly everyone at first: deber de + infinitive. This structure usually expresses probability, assumption, or a logical guess.

• Debe de ser tarde. = It must be late.
• Deben de estar en el trabajo. = They are probably at work.
• Tu celular no tiene señal; debe de estar apagado. = Your phone has no signal; it must be off.

For beginners, this is the best habit: use deber de for guesses. You will also hear plain deber + infinitive used for probability in real life, but the beginner rule above keeps your Spanish clean and easy to control.

Deber As To Owe

Yes, deber also means to owe. Same verb, new personality.

Spanish Phrase	English Meaning	Example
deber dinero	to owe money	Le debo quinientos pesos al banco. = I owe the bank 500 pesos.
deber una explicación	to owe an explanation	Me debes una explicación. = You owe me an explanation.
deber mucho	to owe a lot	No quiero deber mucho en la tarjeta. = I do not want to owe a lot on the card.

When deber means owe, look for a direct object or a person receiving the debt: le debo dinero, te debo una llamada, nos deben el pago.

How To Say Should Have In Spanish

For past regret, use debería haber + past participle. This is the most beginner-friendly way to say should have.

• Debería haber estudiado más. = I should have studied more.
• Deberías haberme llamado. = You should have called me.
• Deberíamos haber salido antes. = We should have left earlier.

Structure: debería + haber + participle

Pattern	Meaning	Example
debería haber comido	should have eaten	Deberías haber comido algo antes.
debería haber ido	should have gone	Yo debería haber ido con ustedes.
debería haber dicho	should have said	No debería haber dicho eso.

Deber Vs Tener Que Vs Hay Que

This is where adult learners usually stop trusting everybody, including themselves. Fair. Here is the practical difference.

Structure	English Meaning	Best Use	Example
deber + infinitive	must / should	duty, moral obligation, advice	Debes pedir disculpas. = You should apologize.
tener que + infinitive	have to	personal obligation, practical necessity	Tengo que trabajar mañana. = I have to work tomorrow.
hay que + infinitive	one must / it is necessary to	general rule, impersonal advice	Hay que reciclar. = You have to recycle / One must recycle.

Use deber when the sentence sounds like advice, duty, or what is right. Use tener que when life is simply making demands. Use hay que when nobody is named and the rule is general.

Three Real-Life Contrasts

• Debes dormir más. = You should sleep more.
  Tienes que dormir aquí. = You have to sleep here.
• Debo hablar con ella. = I should talk to her.
  Tengo que hablar con ella. = I have to talk to her.
• Hay que llegar temprano. = One has to arrive early.
  Debemos llegar temprano. = We should / must arrive early.

Common Mistakes And Quick Fixes

• Mistake: using deber que.
  Fix: it is deber + infinitive, never deber que.
  Debo salir, not debo que salir.
• Mistake: using deber de for every kind of obligation.
  Fix: for beginner Spanish, keep deber de for guesses and deber for obligation.
• Mistake: translating every English must as deber.
  Fix: sometimes tener que sounds more natural in everyday speech.
  Tengo que pagar la renta.
• Mistake: forgetting that deber can mean owe.
  Fix: watch the object.
  Te debo un café. = I owe you a coffee.
• Mistake: trying to say should have with only one verb.
  Fix: use debería haber + participle.
  Debería haber llegado antes.

Quick Reference Summary

• deber + infinitive = must / should / have to
• debería + infinitive = should / ought to
• deber de + infinitive = probably / must be
• deber + noun = to owe
• debería haber + participle = should have

Practice With Deber

Try these without peeking. Yes, your brain will complain. Let it.

Fill In The Blank

1. __________ estudiar más si quieres pasar la clase. (you should)
2. No contesta el teléfono; __________ estar dormido. (he must be / probably is)
3. Te __________ una llamada desde la semana pasada. (I owe you)
4. __________ llevar efectivo para el mercado. (we have to / we must)
5. No __________ haber dicho eso en la reunión. (I should not have)

Translate Into Spanish

1. You should drink more water.
2. They must be at the office.
3. I owe my friend 200 pesos.
4. We should have left earlier.
5. One must respect the rules.

Answer Key

1. Deberías estudiar más si quieres pasar la clase.
2. No contesta el teléfono; debe de estar dormido.
3. Te debo una llamada desde la semana pasada.
4. Debemos llevar efectivo para el mercado.
5. No debería haber dicho eso en la reunión.

1. Deberías tomar más agua.
2. Deben de estar en la oficina.
3. Le debo 200 pesos a mi amigo.
4. Deberíamos haber salido antes.
5. Hay que respetar las reglas.

FAQ About Deber In Spanish

Is deber always “must” in Spanish?

No. Depending on the structure, deber can mean must, should, owe, or express a guess. That is why memorizing one translation and hoping for mercy does not work very well.

What is the difference between deber and tener que?

Deber often feels more like duty, recommendation, or moral obligation. Tener que often feels more practical: schedules, work, errands, reality being pushy again.

Do I really need deber de?

Yes, if you want a clear and tidy way to express probability. It helps you say things like “must be” or “is probably.”

Can deber mean “owe” with people too?

Absolutely. Te debo una respuesta. means “I owe you an answer.” Le debo dinero a Carlos. means “I owe Carlos money.”

Once deber stops looking like one giant mystery blob and starts looking like a few small patterns, it gets much easier to hear, use, and trust. Learn the pattern, steal the examples, and let context do the rest.