Double conjugation for the verb "schaffen" and its compounds: 1) Regular: "ich schaffe" / "ich schaffte" / "geschafft". 2) Irregular: there is a vowel change in the stem of Present tense ("ich schaffe"), the stem of Preterite ("ich schuf") and the stem of Past Participle ("geschaffen").
20 verbs follow this model. Below an extract:
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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.