-ieren

Participle of -ieren Verbs

Level 2

German loan verbs ending in -ieren (like studieren or telefonieren) are a special group of weak verbs. Unlike most verbs, they do not use the ge- prefix in the past participle.

How It Works

Most German verbs form their past participle using the pattern ge- + stem + -t. However, verbs ending in the suffix -ieren (mostly of Latin or French origin) follow a different rule.

The Stress Rule:
In German, the ge- prefix is only added if the first syllable of the base verb is stressed. In -ieren verbs, the stress always falls on the -ier- syllable (e.g., stu-DIER-en). Because the beginning of the base verb is unstressed, the ge- prefix is blocked. This remains true even if the verb has a separable prefix like ausprobieren; since the base verb probieren starts with an unstressed syllable, no -ge- is inserted (ausprobiert).

Weak Verb Rule:
All verbs ending in the -ieren suffix are strictly weak verbs. This means their past participle will always end in -t, never -en.

Usage:
These participles are used to form:

Examples (6)

  1. Ich habe gestern zwei Stunden telefoniert.

    I talked on the phone for two hours yesterday.

    Word by Word: I have yesterday two hours telephoned.

    The verb 'telefonieren' becomes 'telefoniert' in the Perfekt tense.

  2. Sie hat in Berlin Medizin studiert.

    She studied medicine in Berlin.

    Word by Word: She has in Berlin medicine studied.

    The participle 'studiert' is used without 'ge-' because of the -ieren ending.

  3. Hast du die neue App schon ausprobiert?

    Have you already tried out the new app?

    Word by Word: Have you the new app already out-tried?

    Even with the separable prefix 'aus-', the 'ge-' is not added to 'probieren'.

  4. Wir haben den Termin bereits reserviert.

    We have already reserved the appointment.

    Word by Word: We have the appointment already reserved.

    Even with longer verbs like 'reservieren', the rule remains: just add -t to the stem.

  5. Das Problem wurde identifiziert.

    The problem was identified.

    Word by Word: The problem was identified.

    In the passive voice, the -ieren participle 'identifiziert' is used without 'ge-'.

  6. Er hat das Dokument kopiert.

    He copied the document.

    Word by Word: He has the document copied.

    All -ieren verbs are weak verbs, so they always end in -t.

Common Mistakes

  • Adding the 'ge-' prefix to -ieren verbs.

    Ich habe gestern gestudiert.
    Ich habe gestern studiert.

    Learners often over-apply the general rule for weak verbs. Remember: verbs ending in the suffix -ieren never take 'ge-'.

  • Confusing native German verbs like 'frieren' or 'schmieren' with the -ieren suffix.

    Es hat heute gefriert.
    Es hat heute gefroren.

    Verbs like 'frieren' (to freeze) or 'schmieren' (to smear) are native German roots, not loanwords with the -ieren suffix. These native roots usually take the 'ge-' prefix, unlike the -ieren suffix verbs.

  • Inserting '-ge-' into separable -ieren verbs.

    Ich habe das Kleid ausgeprobiert.
    Ich habe das Kleid ausprobiert.

    Even when an -ieren verb has a separable prefix, the 'ge-' is still omitted because the first syllable of the base verb (pro-BIER-en) is unstressed.

How It Connects

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-ierenLevel 2Participle of -ieren Verbs

Learn This First

To understand the participle of -ieren verbs, you first need to know how the Present Perfect tense is structured and how regular (weak) past participles are formed, as -ieren verbs are a specific sub-category of weak verbs that omit the 'ge-' prefix.

Words in This Pattern

-iert-ieren