Verb cernir and its derivatives follow the conjugation pattern of regular verbs in -ir except for alternation in stem "e" -> "ie" in 1st, 2nd, 3rd pers.sg. and 3rd pers.pl. in imperative, indicative and subjunctive present: cernir / cierne
2 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.