Can, Want, Should

Can, Want, Should

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How to use poder, querer and deber in Spanish (can, want, should)

Say what you can do, want to do and should do — in real spoken sentences.

GRAMMAR PACK · 5 LESSONS · A2

The pattern is modal + infinitive: only the first verb conjugates, the second never changes — puedo hablar, quiero comer, debo estudiar, never puedo hablo. Two of them change their stem in the present: poder is o→ue (puedo, puedes, puede, podemos, pueden) and querer is e→ie (quiero, quieres, quiere, queremos, quieren). The nuance worth knowing: deber leans should — advice — while tener que leans have to: debes comer más verduras, but tengo que ir al supermercado. And soler + infinitive covers habits without any extra grammar: suelo despertarme a las siete.

Below: each modal lesson by lesson, how Argentina's vos changes the forms you'll hear, the classic slips — and how you practise it all by talking about your own plans, not with flashcards or drills.

Say this

The phrases that carry the conversation

Poder (can/able to) + infinitive

  • Puedo hablar español un poco.I can speak Spanish a little.
  • ¿Puedes ayudarme con esto?Can you help me with this?
  • Ella puede venir mañana.She can come tomorrow.
  • No puedo dormir con este ruido.I can't sleep with this noise.

Querer (want to) + infinitive

  • Quiero aprender a tocar la guitarra.I want to learn to play the guitar.
  • ¿Quieres ir al cine esta noche?Do you want to go to the movies tonight?
  • Mi hermano quiere estudiar medicina.My brother wants to study medicine.
  • No quiero salir hoy, estoy cansado.I don't want to go out today, I'm tired.

Deber (should/must) + infinitive

  • Debo estudiar más para el examen.I must study more for the exam.
  • Debes comer más verduras.You should eat more vegetables.
  • El doctor dice que debe descansar.The doctor says he/she must rest.
  • No debes llegar tarde al trabajo.You shouldn't arrive late to work.

Regional Spanish

What locals actually say

Textbooks teach one word. Locals use several — pick your region's and stay consistent.

EnglishMexico & most of Latin AmericaArgentina (vos)
Can you help me?¿Puedes ayudarme?¿Podés ayudarme?
What do you want (to drink)?¿Qué quieres?¿Qué querés tomar?
You have to goTienes que irTenés que ir

Watch out

Mistakes that mark you as a textbook speaker

  1. Forgetting stem changes in poder and querer (podo instead of puedo, quero instead of quiero)Both verbs have stem changes in present tense — poder: o→ue (puedo, puedes, puede, podemos, pueden), querer: e→ie (quiero, quieres, quiere, queremos, quieren)
  2. Using deber and tener que interchangeablyDeber expresses moral obligation or advice (you should), while tener que expresses necessity or external obligation (you have to). Debes ser amable (you should be kind) vs. Tienes que ir al doctor (you have to go to the doctor).
  3. Conjugating the infinitive after the modal (puedo hablo instead of puedo hablar)Only the modal verb conjugates — the second verb always stays as an infinitive. Puedo hablar, quiero comer, debo estudiar.

The part no drill site can do

No flashcards. You learn it by using it

Carla, &Be grammar teacher

Carla

Your grammar teacher for this pack

No flashcards, no fill-in-the-blanks. In the Can, Want, Should lessons you talk, and Carla keeps handing you real openings: two things you can do and one you can't — puedo, no puedo — then what you actually want this weekend: quiero descansar, quiero salir con amigos. She'll push you to feel the difference between advice and obligation out loud — debes comer sano vs tienes que ir al doctor — and by the last lesson you're describing your mornings with suelo despertarme a las siete, suelo desayunar café, chaining modals the way the sentences actually come out in conversation.

Blank mid-sentence and nothing bad happens — she waits. That's the practice, without unnecessary judgement.

Finish the 5 lessons and Can, Want, Should is yours — earned, not given.

Download on the App Store First 10 lessons free · 10-minute spoken lessons · your AI coaching team remembers you

Quick answers

Questions people ask

What's the difference between deber and tener que?

Deber is advice or moral duty — should: debes comer más verduras. Tener que is external necessity — have to: tengo que ir al supermercado, tienes que ir al doctor.

How do you conjugate poder in Spanish?

With the o→ue stem change: puedo, puedes, puede, podemos, puedenno puedo dormir con este ruido. The catch is remembering the change: it's puedo, never podo.

Do you conjugate the verb after poder or querer?

No — only the modal conjugates; the second verb stays in the infinitive: puedo hablar, quiero aprender a tocar la guitarra, debo estudiar. Never puedo hablo.

What does soler mean in Spanish?

Soler + infinitive means to usually do something: suelo despertarme a las siete, ¿qué sueles hacer los fines de semana? In the past it's used to: de niño, solía jugar en el parque.

How do you say 'I want to' in Spanish?

Quiero + infinitive: quiero aprender a tocar la guitarra, ¿quieres ir al cine esta noche? For cravings, Mexicans often say se me antoja un taco, and across the Caribbean you'll hear tengo ganas de salir.