Additional teaching example — not a quotation from the book:
جَاءَ أَحْمَدُ — Aḥmad came; nominative subject, ḍamma.
رَأَيْتُ أَحْمَدَ — I saw Aḥmad; accusative object, fatḥa.
مَرَرْتُ بِأَحْمَدَ — I passed by Aḥmad; genitive after a preposition, fatḥa.
Aḥmad is a diptote owing to proper-name status and a verb-like pattern. The cause differs from ʿUmar’s, while the case signs here are the same.
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Noun Case Classes: Type 3 — Diptote (Ghayr Munṣarif)
Additional teaching example — not a quotation from the book:
جَاءَ أَحْمَدُ — Aḥmad came; nominative subject, ḍamma.
رَأَيْتُ أَحْمَدَ — I saw Aḥmad; accusative object, fatḥa.
مَرَرْتُ بِأَحْمَدَ — I passed by Aḥmad; genitive after a preposition, fatḥa.
Aḥmad is a diptote owing to proper-name status and a verb-like pattern. The cause differs from ʿUmar’s, while the case signs here are the same.