Modal verbs moeten, kunnen, mogen

1. What do moeten, kunnen and mogen do?

• Moeten = obligation / something is necessary.
  • Example: Ik moet werken. – I have to work.
• Kunnen = possibility or ability.
  • Example: Ik kan koken. – I can cook / I am able to cook.
• Mogen = permission (or prohibition when used with niet).
  • Example: Ik mag hier roken. – I am allowed to smoke here.
  • Example: Ik mag hier niet roken. – I am not allowed to smoke here.

Think:

• Is it a rule / obligation? → use moeten.
• Is it about can / be able to / possible? → use kunnen.
• Is it about allowed / not allowed? → use mogen.

2. One modal + one main verb

These verbs almost always come together with another verb.

• Structure: [subject] + [modal verb] + [other information] + [main verb at the end]

In a simple main clause:

• Ik moet morgen vroeg opstaan.
• Wij kunnen vanavond niet komen.
• Je mag hier niet eten.

Very important: the main verb is in the infinitive (werken, koken, komen) and stands at the end of the clause.

3. Forms you really need (present tense)

You already saw the full table. Below is a compact version with the forms you will use all the time.

• For ik / jij / hij / zij / het: the form is short (no -en).
• For wij / jullie / zij: the form is the whole infinitive (moeten, kunnen, mogen).

4. Word order: where does the main verb go?

With one modal verb and one main verb:

1. The modal is in position 2 (normal Dutch rule).
2. The main verb goes to the end.

Neutral sentence

• Ik kan vandaag thuis werken.
• Wij moeten nu de klant bellen.

Sentence starting with another element

• Vandaag kan ik thuis werken.
• In de keuken moet je handschoenen dragen.

The modal still stays in second position, and the main verb stays at the end.

5. Where do I put niet?

Many learners doubt where to put niet with these verbs.

• General pattern: [subject] + [modal] + ... + niet + [main verb]

Examples

• Ik kan niet komen. – I cannot come.
• Je mag hier niet roken. – You are not allowed to smoke here.
• Wij moeten vandaag niet werken. – We do not have to work today.

So:

• niet comes before the main verb in infinitive.
• In speech, Dutch people sometimes move niet, but at A1 this pattern is safe and correct.

6. Typical confusion: moeten vs. mogen

Many learners mix these two, because English uses “must / may / can” differently.

• moeten is always some kind of pressure or duty.
• mogen is about permission, so almost the opposite idea.

Quick check in your head:

• Ask yourself in English: “Do I have to …?” → use moeten.
• Ask yourself in English: “Am I allowed to …?” → use mogen.

7. Typical confusion: ability vs. permission

English often uses can for both “be able to” and “be allowed to”. Dutch makes a clearer difference.

• Ability / possibility → kunnen.
• Permission → mogen (with or without niet).

8. Short forms in questions and answers

In everyday Dutch, people often answer only with the modal verb.

Examples

• Q: Kun je morgen komen?
  A: Ja, dat kan. / Nee, dat kan niet.
• Q: Mag ik hier zitten?
  A: Ja, dat mag. / Nee, dat mag niet.
• Q: Moet je vandaag werken?
  A: Ja, ik moet. / Nee, ik hoef niet.

Notice in the last example:

• For “I don’t have to …”, Dutch often uses hoeven: Ik hoef niet te werken.
• At A1 you can still use: Ik moet vandaag niet werken. People will understand you.

9. Self-check: can you choose the right modal?

Cover the rules and check if you can answer these questions in Dutch (just in your head or on paper).

1. Something is a company rule. Which verb do you choose?
   • Use: moeten.
2. You talk about a skill (language, sport, instrument). Which verb?
   • Use: kunnen.
3. You talk about what is allowed / not allowed in the office. Which verb?
   • Use: mogen.
4. Can you write one sentence with each verb about your work or daily life?
   • Ik moet …
   • Ik kan …
   • Ik mag …

10. Mini checklist before you speak or write

• Did I choose the correct modal (duty / ability / permission)?
• Did I use the right form for the subject (ik moet, wij moeten, etc.)?
• Is the main verb in infinitive at the end of the clause?
• If I use niet, is it before the main verb?

If you can answer “yes” to these points, your sentence with moeten, kunnen or mogen is probably correct.