Common mistakes
The middle radical is و or ي. It stretches into a long vowel: قَالَ: and shortens before a consonant ending and in the jussive: قُلْتُ, لَمْ يَقُلْ.
أَعْوَدَ → أَعَادَ Past: heأَعْوَدَتْ → أَعَادَتْ Past: sheأَعْوَدْتَ → أَعَدْتَ Past: you (m.)أَعْوَدْتُ → أَعَدْتُ Past: I