Modal verbsModals: müssen and können

Modal verbs are very useful in German. They help you talk about what you have to do, want to do or are allowed to do and can be used in the present, past and conditional tenses.

Part ofGermanGrammar (for exams until 2025)

Modals: müssen and können

The verb 'müssen'

This is the present tense pattern for müssen – to have to, or must.

GermanEnglish
ich mussI have to, I must
du musstyou have to, you must (singular, informal)
er musshe has to, he must
sie mussshe has to, she must
es mussit has to, it must
wir müssenwe have to, we must
ihr müsstyou have to, you must (plural, informal)
Sie müssenyou have to, you must (singular or plural, formal)
sie müssenthey have to, they must
Germanich muss
EnglishI have to, I must
Germandu musst
Englishyou have to, you must (singular, informal)
Germaner muss
Englishhe has to, he must
Germansie muss
Englishshe has to, she must
Germanes muss
Englishit has to, it must
Germanwir müssen
Englishwe have to, we must
Germanihr müsst
Englishyou have to, you must (plural, informal)
GermanSie müssen
Englishyou have to, you must (singular or plural, formal)
Germansie müssen
Englishthey have to, they must
A woman swimming in fear from a shark bearing its teeth.

Ach! Ich muss schwimmen! – Ugh! I have to swim!

A cat chasing a mouse.

Hilfe! Ich muss fliehen!/Ich muss weg! – Help! I must get away!

A do not disturb sign on the handle of a door which is ajar, with a sleeping baby in the background.

Ruhe, bitte! Wir müssen ruhig sein. – Silence please! We must be quiet.

A German bus stop sign featuring a green circle with an 'H' inside it above an icon of a bus.

Ich muss hier warten. – I must wait here.

Question

So how would you say…?

  • they must
  • she must
  • he has to

The verb 'können'

Now look at the pattern for können - to be able to, or can. Again, the first person singular form (ich) and the third person singular form (er, sie, es) are the same. Remember that man will behave in the same way as the third person singular forms.

GermanEnglish
ich kannI am able to, I can
du kannstyou are able to, you can (singular, informal)
er kannhe is able to, he can
sie kannshe is able to, she can
es kannit is able to, it can
wir könnenwe are able to, we can
ihr könntyou are able to, you can (plural, informal)
Sie könnenyou are able to, you can (singular or plural, formal)
sie könnenthey are able to, they can
Germanich kann
EnglishI am able to, I can
Germandu kannst
Englishyou are able to, you can (singular, informal)
Germaner kann
Englishhe is able to, he can
Germansie kann
Englishshe is able to, she can
Germanes kann
Englishit is able to, it can
Germanwir können
Englishwe are able to, we can
Germanihr könnt
Englishyou are able to, you can (plural, informal)
GermanSie können
Englishyou are able to, you can (singular or plural, formal)
Germansie können
Englishthey are able to, they can
A pig with wings flying in the sky.

Ich kann fliegen. – I can fly.

A clown juggling.

Er kann jonglieren. – He can juggle.

Question

What are these phrases in German?

  • we can
  • you can (formal)
  • I am able to

Did you know?

There's a German Kinderlied – children's song – that uses the modal verb müssen:

Wenn sich die Igel küssen, dann müssen, müssen, müssen sie ganz behutsam sein.

It means 'when hedgehogs kiss each other, they must, must, must be really careful.'

Sounds like sage advice.

Two hedgehogs kissing with hearts above them.