Modal verbs: 'Potere', 'Dovere', 'Volere'

1. What are potere, volere and dovere?

• Potere = can / to be able to (possibility, permission)
• Volere = to want (wish, intention)
• Dovere = must / have to (obligation, necessity)

They are called modal verbs. They work together with another verb in the infinitive.

At A1 you mainly use them in the present tense + infinitive.

2. Core pattern: modal verb + infinitive

Always think in this simple pattern:

• subject + modal verb + infinitive

The modal verb changes (I/you/he…), the infinitive stays the same.

Never conjugate the second verb:

• Io posso lavoro → Io posso lavorare
• Lei deve va a casa → Lei deve andare a casa

3. When to choose potere, volere or dovere?

Ask yourself: What do I want to express?

1. Possibility / permission → potere
   • physical or practical possibility: can
   • permission: may
   • Examples:
     • Posso pagare con la carta? = Can I pay by card?
     • Puoi aprire la finestra? = Can you open the window?
2. Wish / desire → volere
   • what you want or do not want
   • Examples:
     • Voglio bere un caffè. = I want to drink a coffee.
     • Non voglio aspettare. = I don’t want to wait.
3. Obligation / necessity → dovere
   • rules, duties, things you have to do
   • Examples:
     • Devo lavorare domani. = I have to work tomorrow.
     • Dobbiamo pagare il conto. = We must pay the bill.

Self-check:

• If you could replace it with can or may → probably potere.
• If you could replace it with want (to) → probably volere.
• If you could replace it with must / have to → probably dovere.

4. Conjugation: focus on the forms that change a lot

These verbs are irregular. Some forms look very different from the infinitive.

Tip: at first, concentrate on:

• io / tu / lui-lei / loro forms (they are most irregular)
• noi / voi are more regular and easier to remember.

5. Typical spelling traps

• Può has an accent on ò.
  • Correct: può
  • Wrong: puo, pò
• Possono has -ss-, not one s.
  • Correct: possono
  • Wrong: posono
• Vogliono (they want) keeps gli.
  • Correct: vogliono
  • Wrong: volgiono, voliono
• Dobbiamo has double b.
  • Correct: dobbiamo
  • Wrong: dobiamo

6. Word order and negation

The word order is simple and stable:

• subject + modal verb + infinitive

Examples:

• Io devo studiare stasera. = I have to study tonight.
• Voi potete entrare adesso. = You (plural) can enter now.

Negation: non goes before the modal verb.

• non + modal verb + infinitive

Examples:

• Non posso venire. = I can’t come.
• Lei non vuole aspettare. = She doesn’t want to wait.
• Non dobbiamo parlare inglese. = We must not speak English.

Compare:

• Non posso entrare. = I can’t enter.
• Posso non entrare? = Is it possible that I do not enter? (less common, more nuanced)

At A1, use mainly: non + modal.

7. Questions with modal verbs

Good news: in Italian, the word order often stays the same.

• subject + modal verb + infinitive + ?

Examples:

• Puoi aprire la porta? = Can you open the door?
• Volete mangiare adesso? = Do you want to eat now?
• Devi lavorare domani? = Do you have to work tomorrow?

Very often, the subject is omitted if it is clear:

• (Tu) puoi venire stasera? → Puoi venire stasera?

So you mainly need the correct modal form to show who the subject is.

8. Polite forms: Lei and vorrei

In shops and formal situations you often hear:

• Lei può…? = Can you (formal) … ?
• Lei deve… = You (formal) must …

Examples:

• Lei può firmare qui? = Can you sign here?
• Lei deve pagare alla cassa. = You must pay at the cashier.

For volere, the polite form is usually:

• Vorrei… = I would like… (soft / polite)

Examples:

• Vorrei una giacca blu. = I would like a blue jacket.
• Vorrei provare questi pantaloni. = I would like to try these trousers.

Self-check:

• In a shop, prefer Vorrei… instead of a direct Voglio….

9. Common learner mistakes to avoid

• Conjugating both verbs
  • Posso vado al lavoro.
  • → Posso andare al lavoro. (infinitive)
• Using the wrong modal verb
  • Voglio pagare il biglietto. (could sound demanding in some contexts)
  • In a shop: Vorrei pagare il biglietto. (more polite)
  • For obligation: use devo, not voglio.
• Wrong negative position
  • Posso non venire. (possible, but advanced nuance)
  • At A1, say: Non posso venire.
• Forgetting the subject in formal speech
  • With Lei (formal), you usually keep the pronoun for clarity:
  • Lei può provare la giacca? (more natural in a shop)

10. Quick self-check: can I use these verbs now?

Go through these questions mentally. If you can answer “yes”, you are ready to use the grammar in conversation.

1. Can I choose between potere / volere / dovere depending on whether I mean can / want / must?
2. Can I build sentences with the pattern subject + modal verb + infinitive?
3. Do I remember that the second verb is always infinitive (mangiare, lavorare, andare…)?
4. Can I say simple negatives like Non posso, Non voglio, Non devo?
5. Can I ask simple questions like Puoi…?, Vuoi…?, Devi…? without changing the word order too much?
6. In a shop, do I know polite forms like Vorrei… and Lei può…??

If some points are still unclear, focus on:

• repeating the irregular forms (io/tu/lui-lei/loro)
• building many short sentences from your own life (work, family, daily routine).

Example mini-practice you can do alone:

• Write 3 sentences with devo (things you must do today).
• Write 3 sentences with voglio (things you want this week).
• Write 3 questions with puoi / potete / può (things you ask other people).

This will prepare you well for speaking activities in class.