Modalverben: Können, Müssen, Wollen, Sollen, Dürfen, Mögen
Master German modal verbs and learn how they change sentence meaning, conjugate in the present tense, and control word order with a second verb at the end.
Modalverben: The Small Verbs That Change Everything
German modal verbs are small, powerful words that tell us about ability, necessity, permission, desire, and advice.
Compare these sentences:
-
Ich lerne Deutsch.
I learn German. -
Ich muss Deutsch lernen.
I have to learn German. -
Ich will Deutsch lernen.
I want to learn German. -
Ich kann Deutsch lernen.
I can learn German.
The main action is still lernen. But the modal verb changes the whole feeling of the sentence.
The six most important modal verbs are:
können, müssen, wollen, sollen, dürfen, mögen
Let's make them friendly.
1. What Is a Modal Verb?
A modal verb usually appears with a second verb in the infinitive.
-
Ich kann schwimmen.
I can swim. -
Du musst lernen.
You have to study. -
Wir wollen reisen.
We want to travel.
The modal verb is conjugated. The second verb stays in the infinitive and moves to the end.
Pattern:
Subject + modal verb + other information + infinitive
Ich muss heute Abend für die Prüfung lernen.
The modal verb (muss) is near the front. The main action (lernen) waits at the end.
2. The Six Core Modal Verbs
| Modal Verb | Basic Meaning | Example |
|---|---|---|
| können | can / be able to | Ich kann gut kochen. |
| müssen | must / have to | Du musst schlafen. |
| wollen | want to | Wir wollen gehen. |
| sollen | should / be supposed to | Er soll mehr lernen. |
| dürfen | may / be allowed to | Ihr dürft hier warten. |
| mögen | like | Sie mag Kaffee. |
For polite wishes, German often uses möchten, which is technically Konjunktiv II of mögen:
- Ich möchte einen Tee.
I would like a tea.
3. Present Tense Conjugation
Modal verbs are irregular, but they share a helpful pattern:
In the singular forms (ich, du, er/sie/es), the vowel often changes. In the plural forms, the infinitive stem comes back.
Können
| Person | Form |
|---|---|
| ich | kann |
| du | kannst |
| er/sie/es | kann |
| wir | können |
| ihr | könnt |
| sie/Sie | können |
Müssen
| Person | Form |
|---|---|
| ich | muss |
| du | musst |
| er/sie/es | muss |
| wir | müssen |
| ihr | müsst |
| sie/Sie | müssen |
Wollen
| Person | Form |
|---|---|
| ich | will |
| du | willst |
| er/sie/es | will |
| wir | wollen |
| ihr | wollt |
| sie/Sie | wollen |
Notice something strange?
Ich and er/sie/es are the same:
- ich kann / er kann
- ich muss / sie muss
- ich will / es will
That is normal for modal verbs.
4. Word Order with Modal Verbs
Modal verbs create a sentence bracket:
- The modal verb is conjugated and goes in position 2.
- The second verb is an infinitive and goes to the end.
| Sentence | Structure |
|---|---|
| Ich kann Deutsch sprechen. | kann ... sprechen |
| Du musst morgen arbeiten. | musst ... arbeiten |
| Wir wollen ins Kino gehen. | wollen ... gehen |
If the sentence gets longer, the infinitive still stays at the end:
- Ich muss morgen nach der Arbeit noch schnell einkaufen.
I still have to shop quickly tomorrow after work.
The end of the sentence is where the real action lands.
5. Questions with Modal Verbs
In yes/no questions, the modal verb goes to position 1:
-
Kannst du Deutsch sprechen?
Can you speak German? -
Muss ich das machen?
Do I have to do that? -
Dürfen wir hier sitzen?
Are we allowed to sit here?
In W-questions, the question word comes first and the modal verb is second:
-
Wann musst du arbeiten?
When do you have to work? -
Warum willst du gehen?
Why do you want to leave? -
Was sollen wir kaufen?
What should we buy?
6. The Difference Between Müssen, Sollen, and Dürfen
These three verbs are often confused because they all sound like rules or obligations.
Müssen = necessity
Use müssen when something is necessary or unavoidable.
- Ich muss heute lernen.
I have to study today.
Sollen = advice, instruction, expectation
Use sollen when someone else says something is expected.
-
Der Arzt sagt, ich soll mehr schlafen.
The doctor says I should sleep more. -
Du sollst deine Mutter anrufen.
You are supposed to call your mother.
Dürfen = permission
Use dürfen when something is allowed.
-
Hier darf man parken.
You are allowed to park here. -
Darf ich eine Frage stellen?
May I ask a question?
7. Negation Changes the Meaning
Be careful: negating modal verbs can change the meaning strongly.
| German | Meaning |
|---|---|
| Ich muss gehen. | I have to go. |
| Ich muss nicht gehen. | I do not have to go. |
| Ich darf gehen. | I am allowed to go. |
| Ich darf nicht gehen. | I am not allowed to go. |
| Ich will gehen. | I want to go. |
| Ich will nicht gehen. | I do not want to go. |
The pair muss nicht is especially important:
- Du musst nicht kommen.
You do not have to come.
It does not mean "You must not come."
For "must not," German usually uses nicht dürfen:
- Du darfst nicht kommen.
You must not / are not allowed to come.
8. Modal Verbs Without a Second Verb
Sometimes the second verb is obvious and gets omitted:
-
Ich kann Deutsch.
I can speak German. -
Ich muss nach Hause.
I have to go home. -
Darf ich rein?
May I come in?
This is common in spoken German. The missing verb is understood from context.
9. Modal Verbs in the Past
In everyday German, modal verbs often use the Präteritum for the past:
| Infinitive | Präteritum | Example |
|---|---|---|
| können | konnte | Ich konnte nicht schlafen. |
| müssen | musste | Wir mussten warten. |
| wollen | wollte | Sie wollte nach Hause. |
| sollen | sollte | Er sollte mehr lernen. |
| dürfen | durfte | Ihr durftet gehen. |
| mögen | mochte | Ich mochte den Film. |
This is one of the places where spoken German uses Präteritum very naturally.
Summary Checklist
- Modal verbs change the meaning of another verb.
- The modal verb is conjugated; the second verb stays in the infinitive.
- The infinitive goes to the end of the sentence.
- können = ability, müssen = necessity, wollen = desire.
- sollen = advice/expectation, dürfen = permission, mögen/möchten = liking/wishing.
- muss nicht means "does not have to."
- darf nicht means "is not allowed to."
Mini-Quiz
Choose the best modal verb:
-
Ich ___ heute arbeiten. Mein Chef wartet.
a) muss b) darf c) mag -
___ ich hier sitzen?
a) Muss b) Darf c) Will -
Er ___ sehr gut schwimmen.
a) kann b) soll c) darf
Answers: 1a, 2b, 3a
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