Irregular conjugation for the verb "halten" and its compounds: stem vowel mutation (umlaut) in singular form of the second and third person in Present tense ("du hältst"). There is a vowel change in the stem of Present tense ("ich halte"), the stem of Preterite ("ich hielt") and the stem of Past Participle ("gehalten").
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Based on the ending, you can identify features that different verbs have in common. Click on the verbs above to see their conjugation tables and explore their conjugation patterns.