Verb Conjugation (Present Tense)
Essential verbs conjugated in the present tense
A German verb changes its ending to match the subject. Take the infinitive, remove -en, and add the ending: ich -e · du -st · er/sie/es -t · wir -en · ihr -t · sie/Sie -en lernen → ich lerne, du lernst, er lernt, wir lernen, ihr lernt, sie lernen. Two adjustments: if the stem ends in -t or -d, insert an e so it stays pronounceable (du arbeitest). And a group of strong verbs changes the stem vowel in du and er/sie/es only — fahren → du fährst, er fährt; sprechen → du sprichst, er spricht. The endings themselves never change.
Persian conjugation is very regular and the personal ending is highly predictable. German has the same idea but adds the stem-vowel change in exactly two persons, which feels arbitrary at first. When you learn a new verb, always test du and er. If the vowel shifts there, mark it — that is the only irregularity you need to remember.