German Modal Verbs: Können, Müssen, Wollen and More

You probably already know how to say “I go” or “I speak” in German. Modal verbs are the next layer — the everyday tools you reach for to ask permission, state what you have to do, or order a coffee without sounding rude. They show up in almost every conversation. The good news: once you internalize a single structural rule, all seven of them behave the same way. The catch most guides skip — separable verbs do something surprising when a modal joins them — is exactly what we’ll untangle here.

What are modal verbs in German?

Modal verbs (die Modalverben) don’t usually stand alone. They modify another verb to express ability, necessity, desire, or permission. German has six of them, plus möchten (“would like”), historically the polite subjunctive of mögen but used so often it behaves like a seventh modal.

Here’s the whole family at a glance, with the one-line meaning of each:

German	English	Core meaning
können	can, to be able to	ability
müssen	must, to have to	necessity
wollen	to want (to)	will / desire
dürfen	may, to be allowed to	permission
sollen	should, to be supposed to	outside obligation
mögen	to like	liking

The one rule that explains everything

In a German main clause, only the modal is conjugated, and it lands in position 2. The verb that carries the real meaning stays in the infinitive and drops all the way to the end of the clause. Together they form a bracket — the Satzklammer — around everything in between:

[Subject] [MODAL = pos. 2] [middle: objects, time, place …] [INFINITIVE]

English keeps the two verbs glued together (“I must go now”), so this split feels deeply wrong at first. Look at how the pieces spread out in German:

German	English
Er kann sehr gut tanzen.	He can dance very well.
Ich möchte heute Abend ins Kino gehen.	I'd like to go to the cinema tonight.
Sie will in Berlin studieren.	She wants to study in Berlin.

In a yes/no question, the modal jumps to position 1, but the infinitive still anchors the end: Kannst du mich später anrufen? (“Can you call me later?”). If you want the full picture of why finite verbs land where they do, our guide to German word order rules generalizes this same bracket beyond modals.

Meet the verbs

können is your ability verb: Ich kann Deutsch sprechen. It also covers casual permission — Kann ich die Fotos sehen? (“Can I see the photos?”).

müssen expresses necessity: Ich muss jetzt gehen. Watch the negative carefully — nicht müssen means “don’t have to,” not “must not.” To forbid something, you need nicht dürfen: Du darfst hier nicht rauchen (“You’re not allowed to smoke here”).

wollen means “want,” but it’s blunt — Ich will einen Kaffee can sound demanding. For anything polite, use möchten: Ich möchte einen Kaffee, bitte. This is the single most useful courtesy upgrade you can make. Don’t confuse möchten with mögen, which means liking a thing or person on its own: Ich mag Kaffee (“I like coffee”) versus Ich möchte Kaffee (“I’d like some coffee now”).

That leaves dürfen for permission (Die Kinder dürfen bis 21 Uhr aufbleiben) and sollen for obligation coming from someone else — Mama hat gesagt, ich soll dir helfen (“Mom said I’m supposed to help you”).

Present-tense conjugation chart

Modals have a signature quirk: a stem-vowel change in the singular (every modal except sollen), and identical ich and er/sie/es forms with no ending — unique to this verb group.

Person	können	müssen	wollen	dürfen	sollen	mögen	möchten
ich	kann	muss	will	darf	soll	mag	möchte
du	kannst	musst	willst	darfst	sollst	magst	möchtest
er/sie/es	kann	muss	will	darf	soll	mag	möchte
wir	können	müssen	wollen	dürfen	sollen	mögen	möchten
ihr	könnt	müsst	wollt	dürft	sollt	mögt	möchtet
sie/Sie	können	müssen	wollen	dürfen	sollen	mögen	möchten

The biggest beginner slip is adding a -t to the third person: it’s er kann, er muss, er will — never er kannt.

The pitfall everyone skips: modals + separable verbs

Here’s where most learners trip. A separable verb like aufstehen (“to get up”) normally splits in a main clause — the prefix flies to the end:

German (no modal)	English
Ich stehe früh auf.	I get up early.
Ich rufe dich an.	I call you.

But add a modal, and the lexical verb becomes an infinitive — and an infinitive is never split. The prefix and stem stay welded together as one word at the end:

German (with modal)	English
Ich muss früh aufstehen.	I have to get up early.
Ich will dich anrufen.	I want to call you.
Wir wollen heute Abend fernsehen.	We want to watch TV tonight.

So the same verb behaves oppositely depending on whether a modal is present: Ich rufe dich an (split) versus Ich will dich anrufen (glued). The fix is mechanical — with a modal, write the plain dictionary form and never break it apart.

Modal verbs in the past and in subordinate clauses

For modals, German prefers the simple past (Präteritum) over the perfect, even in speech — the opposite of most verbs. Note the umlaut vanishes: können → konnte, müssen → musste, dürfen → durfte, mögen → mochte. So Ich konnte gestern nicht kommen (“I couldn’t come yesterday”) keeps the same bracket, with konnte in position 2 and kommen at the end.

In a subordinate clause introduced by dass, weil, or wenn, the finite verb moves to the very end — which means the order flips to infinitive, then conjugated modal: Ich habe keine Zeit, weil ich meine Wohnung aufräumen muss (“I have no time because I have to tidy my apartment”). If word order in dependent clauses still feels slippery, the verb-position guide breaks it down step by step.

Ready to lock these in? Open any modal in the dictionary — like können or müssen — to hear the audio and see the full conjugation, then try building three sentences of your own with the verb at the end. That single habit will do more for your German than memorizing any chart.