The three forms have clear shapes:
1. مَفْعَلٌ = singular.
2. مَفْعَلَانِ = dual.
3. مَفَاعِلُ = plural.
The dual is formed with the familiar dual ending, while the plural changes internally.
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How to Recognize the Number
Derived Nouns: Noun of Place and Time (Ism Dharf)
The three forms have clear shapes:
1. مَفْعَلٌ = singular.
2. مَفْعَلَانِ = dual.
3. مَفَاعِلُ = plural.
The dual is formed with the familiar dual ending, while the plural changes internally.