This structure should help you with the basic verb forms and their tenses. 1. Infinitive The infinitive form of the verb is its base form, usually ending in -en or -n. 2. Simple Past (Präteritum) The simple past is used for actions that have been completed in the past. Regular verbs typically form their past tense by adding a specific ending to the stem of the verb. Irregular verbs may change their stem vowels. 3. Present Perfect (Perfekt) The present perfect tense is formed with the auxiliary v