The verb 'bieten' is definitely an illustration of a robust German verb that undergoes a vowel adjust in its stem in the course of conjugation. This attribute makes it important for learners to be aware of these improvements when using the verb in several tenses. Potentially delicate or inappropriate examples https://entdeckensiediewelt.de/wie-eine-geschaftsadresse-in-leipzig-ihre-marke-aufwerten-kann/