Modal Verbs: können, müssen, wollen, möchten
Modal verbs express ability, necessity and wishes. Learn the four A1 essentials — können, müssen, wollen and möchten — their special conjugation, and the sentence bracket they build with a second verb.
What modal verbs do
Modal verbs do not describe an action themselves — they colour another verb. Können expresses ability: what you can do. Müssen expresses necessity: what you must do. Wollen expresses a firm intention: what you want to do. And möchten expresses a polite wish: what you would like.
The modal pairs up with a second verb in the infinitive — the plain -en dictionary form you know from lesson two. Ich kann schwimmen (I can swim): kann carries the "ability" meaning, schwimmen names the action. This two-verb team is one of the most powerful patterns at A1, because with four modals and the verbs you already know, the number of things you can express multiplies instantly.
Ich kann gut schwimmen.
I can swim well.
Er muss viel arbeiten.
He has to work a lot.
Sie will Deutsch lernen.
She wants to learn German.
Ich möchte einen Tee trinken.
I would like to drink a tea.
A special conjugation
Modal verbs break two rules you have learned — in a helpful, consistent way. First, the ich form and the er/sie/es form are identical, and neither takes an ending: ich kann, er kann; ich muss, sie muss. Second, the singular forms change their vowel: können gives kann, müssen gives muss, wollen gives will.
The full pattern for können: ich kann, du kannst, er/sie/es kann, wir können, ihr könnt, sie/Sie können. Müssen and wollen work the same way: muss, musst, muss and will, willst, will in the singular; regular forms in the plural. Möchten is the gentle exception — it keeps its vowel throughout: ich möchte, du möchtest, er möchte. Watch out for the false friend: German will means "wants to", never English "will".
Ich kann heute nicht kommen.
I cannot come today.
Du musst jetzt gehen.
You have to go now.
Er will ein Auto kaufen.
He wants to buy a car.
will = wants to, not English "will".
Wir können morgen spielen.
We can play tomorrow.
Plural forms are regular, with the infinitive vowel.
The sentence bracket: infinitive at the end
Word order is where modal verbs really shape the sentence. The modal takes the normal verb position — second in the sentence — but the infinitive moves all the way to the end. Everything else sits between them: Wir wollen heute Pizza essen (We want to eat pizza today), literally "We want today pizza eat".
This structure is called the sentence bracket: the modal opens the bracket, the infinitive closes it. English speakers instinctively keep the two verbs together ("We want to eat pizza today"), so this needs conscious practice: say the modal, deliver all the details, and save the action verb for last. In questions the same bracket appears around the question structure: Kannst du morgen kommen? (Can you come tomorrow?) — modal first or second, infinitive last, always.
Wir wollen heute Pizza essen.
We want to eat pizza today.
Modal in position two, infinitive at the very end.
Ich muss morgen früh arbeiten.
I have to work early tomorrow.
Kannst du morgen kommen?
Can you come tomorrow?
The bracket also holds in questions.
Das Kind kann nicht schlafen.
The child cannot sleep.
"möchten" or "wollen"? Politeness matters
Wollen and möchten both point at a wish, but their tone differs sharply. Wollen is strong and direct — a firm plan or demand. Möchten is soft and polite — the equivalent of English "would like". In a café, Ich will einen Kaffee sounds blunt, almost childish; Ich möchte einen Kaffee, bitte is the natural way to order.
Möchten has one more convenient habit: it can stand alone with just a noun, no second verb needed. Ich möchte einen Tee simply means "I would like a tea" — the verb "to have/drink" is understood. Waiters will ask you Was möchten Sie? — and now you can answer politely, bracket and all. As a rule of thumb for daily life: order and request with möchten, reserve wollen for real intentions and plans — and when in doubt in a shop, restaurant or office, möchten with bitte is always the safe, friendly choice.
Ich möchte einen Kaffee, bitte.
I would like a coffee, please.
Was möchten Sie?
What would you like?
The standard question in cafés and shops.
Sie wollen im Sommer nach Deutschland fahren.
They want to travel to Germany in the summer.
Check yourself
Quick checks on this lesson. Get at least three quarters right to mark it as completed.
Fill in the gap
Ich gut schwimmen.
Hint: Modal verb "können", first person singular — no ending, changed vowel.
Practise what you learned