The past tenses of modal verbs — perfect (hat arbeiten müssen)

Die Vergangenheitsformen bei Modalverben- Perfekt (hat arbeiten müssen)


Modalverben werden auch in der Perfektform gebildet.

(Modal verbs can also be formed in the perfect tense.)

What’s special here: the “double infinitive” in the Perfekt

With these modal verbs, German often uses a pattern that looks unusual at first:

  • Ich habe arbeiten müssen. (not: “I have had to worked”)

Key idea: in the Perfekt, the main action stays in the infinitive (arbeiten), and the modal also stays in the infinitive (müssen).

The structure you should build (and memorize)

Use this “formula” when you talk about the past with a modal verb:

  • haben (conjugated) + infinitive (main verb) + infinitive (modal verb)
Meaning German pattern Example (correct)
I had to … habe + Inf. + müssen Ich habe den Vertrag unterschreiben müssen.
I was able to … habe + Inf. + können Ich habe die Arbeitserlaubnis verlängern können.
I was supposed to … habe + Inf. + sollen Wir haben die Kündigungsfrist einhalten sollen.
I wanted to … habe + Inf. + wollen Wir haben den Chef sprechen wollen.

The most common mistake (and how to fix it)

English speakers often try to use a past participle for the main verb. In German, that’s usually wrong in this structure.

  • Correct: Ich habe den Vertrag unterschreiben müssen.
  • Wrong: Ich habe den Vertrag unterschrieben müssen.

Quick fix: If you see a modal verb at the end (müssen/können/sollen/wollen), check that the verb before it is an infinitive, not Partizip II.

Word order: where do the verbs go?

In a normal main clause, the verbs “collect” at the end:

  • Ich habe gestern länger im Büro bleiben müssen.
  • Wir haben beim Gespräch bessere Gleitzeit vereinbaren wollen.

Time/place details (gestern, wegen…, im Büro, beim Gespräch…) usually sit in the middle, before the verb group.

When do you use this (and when not)?

This explanation matches what you see in your book: it focuses on these four modals in the Perfekt:

  • müssen (necessity)
  • können (ability/possibility)
  • sollen (expectation/obligation from others)
  • wollen (intention)

Don’t overthink it: if your sentence has “had to / could / was supposed to / wanted to” in the past, this is usually the pattern you need.

Self-check in 10 seconds (before you submit an answer)

  1. Do I have haben as the helping verb? (habe / hast / hat / haben / habt)
  2. Do I have two infinitives at the end?
    • infinitive of the main verb (unterschreiben, verlängern, einhalten…)
    • infinitive of the modal verb (müssen/können/sollen/wollen)
  3. Did I avoid Partizip II like unterschrieben, verlängert in this structure?

Mini “translation map” (to think faster)

English idea German infinitives at the end
had to sign unterschreiben müssen
was able to extend verlängern können
was supposed to comply einhalten sollen
wanted to agree vereinbaren wollen
  1. In the perfect tense: form it with the infinitive, not with the past participle (Partizip II).
  2. Structure: conjugated form of haben + conjugated verb + modal verb
Verb (verb)Beispiel
müssen  (to have to)  habe müssen (have had to)Ich habe am Wochenende arbeiten müssen. (I had to work on the weekend.)
können (to be able to) hast können (have been able to)Du hast gestern das Arbeitsverhältnis antreten können. (You were able to start the employment relationship yesterday.)
sollen (to be supposed to) hat sollen (has been supposed to)Sie hat das tun sollen. (She was supposed to do that.)
wollen (to want to) haben wollen (have wanted to)Wir haben den Chef sehen wollen. (We wanted to see the boss.)

Exceptions!

  1. In the perfect tense, only the verbs müssen, wollen, sollen and können are used.

Exercise 1: Multiple choice

Instruction: Choose the correct answer

1. Wegen der kurzen Kündigungsfrist habe ich gestern noch den neuen Arbeitsvertrag ________.

Because of the short notice period, I had to ________ the new employment contract yesterday.

2. Zum Glück hast du die Arbeitserlaubnis rechtzeitig ________.

Luckily, you were able to ________ the work permit in time.

3. Im Tarifvertrag hat der Arbeitgeber die Prämien transparent ________.

In the collective agreement, the employer should have ________ the bonuses transparently.

4. Wir haben beim Gespräch mit der Personalabteilung bessere Gleitzeit ________.

In the meeting with the HR department, we wanted to ________ better flexitime.

Exercise 2: Rewrite the phrases

Instruction: Rewrite the sentences into the perfect tense with a modal verb: use “haben” + infinitive of the main verb + infinitive of the modal verb (e.g. “Ich musste arbeiten.” → “Ich habe arbeiten müssen.”).

Show/Hide translation Show/Hide hints
  1. Ich musste gestern länger im Büro bleiben.
    ⇒ ______________________________________________________________________________________________________________ Example
    Ich habe gestern länger im Büro bleiben müssen.
    (I had to stay longer at the office yesterday.)
  2. Wir konnten den Termin am Montag vorziehen.
    ⇒ ______________________________________________________________________________________________________________ Example
    Wir haben den Termin am Montag vorziehen können.
    (We were able to move the appointment forward to Monday.)
  3. Sie wollte den Chef persönlich sprechen.
    ⇒ ______________________________________________________________________________________________________________ Example
    Sie hat den Chef persönlich sprechen wollen.
    (She wanted to speak to the boss personally.)
  4. Ihr solltet das Formular online ausfüllen.
    ⇒ ______________________________________________________________________________________________________________ Example
    Ihr habt das Formular online ausfüllen sollen.
    (You were supposed to fill out the form online.)

Exercise 3: Multiple Choice

Instruction: Choose the grammatically correct perfect tense form with a modal verb.

1.
Incorrect: The past participle 'unterschrieben' was incorrectly used here; with modal verbs in the perfect tense, the main verb remains in the infinitive.
2.
Incorrect: The past participle 'eingehalten' must not be used here; with modal verbs in the perfect tense, the main verb remains in the infinitive.

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This content has been designed and reviewed by the coLanguage pedagogical team: About coLanguage

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Flavio Redecker

Master in french linguistics and history

Osnabrück University


Last Updated:

Friday, 08/05/2026 02:37