1. Wrong: not every kasra marks genitive case; in hāʾulāʾi it is part of the built form.
2. Wrong: isolated Zayd with pause is not inherently built; in sentences it has Zaydun/Zaydan/Zaydin.
3. Wrong: not every short noun is built; yadun is declinable.
Correct method: identify the word class, its syntactic role, and why its final vowel appears.
Opening interactive controls...
The indeclinable noun: definition, rule and eight classes
1. Wrong: not every kasra marks genitive case; in hāʾulāʾi it is part of the built form.
2. Wrong: isolated Zayd with pause is not inherently built; in sentences it has Zaydun/Zaydan/Zaydin.
3. Wrong: not every short noun is built; yadun is declinable.
Correct method: identify the word class, its syntactic role, and why its final vowel appears.