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.
ضَيَعَ → ضَاعَ Past: heضَيَعَتْ → ضَاعَتْ Past: sheضَيَعْتَ → ضِعْتَ Past: you (m.)ضَيَعْتُ → ضِعْتُ Past: I