German: Expressing External Obligation with 'müssen' and 'haben zu'
Learn to express 'have to' and 'has to' in German using 'müssen' and 'haben zu' for external obligations, and distinguish them from 'must'.
By TheaFirst conversations · Yapr Learn
In English, 'have to' often expresses an external obligation, like a rule, schedule, or someone else's requirement. German has two common ways to express this: the modal verb 'müssen' and the construction 'haben zu' + infinitive. This lesson teaches you how to use both to say what you or others have to do, and how they differ from 'must' in English. You will learn to talk about obligations from outside sources, such as work, appointments, or instructions.
By the end, you can…
- express external obligations using 'müssen' in the present tense.
- use 'haben zu' + infinitive to state obligations.
- distinguish between 'müssen' and 'haben zu' in terms of register and emphasis.
- talk about what I have to do tomorrow or regularly.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
Ich muss morgen arbeiten.
I have to work tomorrow.
ikh moos MOR-gen AR-bai-ten
Standard way to express an external obligation, such as a work schedule.
Du hast die Hausaufgaben zu machen.
You have to do the homework.
doo hast dee HOUS-ouf-gah-ben tsoo MA-khen
Using 'haben zu' + infinitive; often implies an instruction or rule, slightly formal.
Er muss um acht Uhr losfahren.
He has to leave at eight o'clock.
air moos oom akht oor LOSS-fah-ren
Expresses a scheduled obligation, like catching a train.
Wir haben pünktlich zu sein.
We have to be on time.
veer HAH-ben PÜNKHT-likh tsoo zine
'haben zu' with 'sein' (to be); common in announcements or rules.
Sie müssen die Rechnung bezahlen.
You (formal) have to pay the bill.
zee MÜS-en dee REKH-noong be-TSAH-len
Formal 'you' (Sie) with 'müssen'; external obligation from a company or authority.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
The modal verb 'müssen' is conjugated and placed in the second position, with the main verb in the infinitive at the end: 'Ich muss morgen arbeiten.' (I have to work tomorrow.) The construction 'haben zu' + infinitive also puts the main verb at the end: 'Ich habe zu arbeiten.' (I have to work.) However, 'haben zu' is more formal and often implies an instruction or rule, while 'müssen' is neutral and widely used. For example, 'Du musst das machen.' vs. 'Du hast das zu machen.' Both mean 'You have to do that,' but the latter sounds more like an order.
When to use it
Use 'müssen' for general external obligations: 'Ich muss zum Arzt.' (I have to go to the doctor.) Use 'haben zu' when the obligation comes from an authority, rule, or instruction, and you want to sound formal or emphatic: 'Die Schüler haben die Regeln zu befolgen.' (The students have to follow the rules.) In everyday conversation, 'müssen' is more common. 'Haben zu' is frequent in written rules, announcements, or when someone in authority speaks. Note that 'müssen' can also express logical necessity ('Er muss krank sein.' = He must be sick.), but 'haben zu' never does.
Listen to each line, then take one part and reply out loud.
Hallo! Muss ich heute länger arbeiten?
Hello! Do I have to work longer today?hah-LOH! moos ikh HOY-te LENG-er AR-bai-tenJa, du hast die Präsentation bis fünf Uhr fertigzustellen.
Yes, you have to finish the presentation by five o'clock.yah, doo hast dee pre-zen-tah-TSEE-ohn bis fünff oor FER-tikh-tsoo-shtel-lenUnd was muss ich noch machen?
And what else do I have to do?oont vas moos ikh nokh MA-khenDu hast auch die E-Mails zu beantworten.
You also have to answer the emails.doo hast oukh dee EE-mayls tsoo be-ANT-vor-tenA little context goes a long way
In German-speaking countries, obligations are often expressed directly. Using 'müssen' is standard and neutral, while 'haben zu' can sound more authoritative or formal, similar to 'you are required to' in English. In Austria and Switzerland, 'müssen' is also common, but 'haben zu' might be less frequent in casual speech. Always consider the context: at work, 'müssen' is safe; in written rules, 'haben zu' adds emphasis.
One thing to watch for
Using 'haben zu' in casual conversation where 'müssen' is more natural, e.g., 'Ich habe morgen zu arbeiten.'
Try this instead: In everyday speech, prefer 'müssen': 'Ich muss morgen arbeiten.' Use 'haben zu' for formal instructions or rules, e.g., 'Die Mitarbeiter haben pünktlich zu erscheinen.'
Your turn
Try answering out loud before checking a possible answer.
1How would you say 'She has to study for the exam' using 'müssen'?
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Sie muss für die Prüfung lernen.
'Müssen' is conjugated for 'sie' (she) as 'muss', and the main verb 'lernen' goes to the end. This is the standard way to express an external obligation.
2Rewrite 'You have to be quiet' using 'haben zu' (informal singular).
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Du hast leise zu sein.
'Haben zu' + infinitive: 'hast' for 'du', and 'leise zu sein' at the end. This sounds more like an instruction, suitable for a rule or order.
3What is the difference between 'Ich muss das machen' and 'Ich habe das zu machen'?
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Both mean 'I have to do that', but 'haben zu' is more formal and often implies an external authority or rule, while 'müssen' is neutral and more common in everyday speech.
The core meaning is similar, but register and emphasis differ. 'Haben zu' can sound like a command from someone in charge.
Use 'müssen' for everyday external obligations; use 'haben zu' for formal rules or instructions. Both put the main verb at the end.
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