● Rule for forming the dual from a singular noun:
○ Remove the tanwīn or vowel mark from the final letter of the singular noun and give it fatḥah.
○ Add ـَانِ (alif followed by nūn with kasrah) at the end.
○ Example: رَجُلٌ (one man) → رَجُلَانِ (two men)
○ Example: كِتَابٌ (one book) → كِتَابَانِ (two books)
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Rule for Forming the Dual
Number of Nouns: Singular and Dual
● Rule for forming the dual from a singular noun:
○ Remove the tanwīn or vowel mark from the final letter of the singular noun and give it fatḥah.
○ Add ـَانِ (alif followed by nūn with kasrah) at the end.
○ Example: رَجُلٌ (one man) → رَجُلَانِ (two men)
○ Example: كِتَابٌ (one book) → كِتَابَانِ (two books)