Irregular conjugation: replacement of -e- in the stem of Present tense with -i- for the second and third person singular form of Present tense and singular form of Imperative , and with -a- for Preterite ("ich half") and with -o- in Past Participle ("geholfen").
20 verbs follow this model. Below an extract:
To see other models, refer to Model Table
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.