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.
طَيَرَ → طَارَ Past: heطَيَرَتْ → طَارَتْ Past: sheطَيَرْتَ → طِرْتَ Past: you (m.)طَيَرْتُ → طِرْتُ Past: I