The ver conjugation from the existing tense follows the conjugation sample of standard ‑er verbs, that means that the stem stays ve‑ and is followed by the standard existing tense endings. I’ve established a free of charge PDF cheat sheet with all of ver’s forms plus the definition and examples https://dietrockenheit.de/2024/05/03/bargeld-gegen-gold-so-verkaufen-sie-ihren-alten-schmuck-mit-gewinn/