Type 1 — Fully declinable singular, زَيْد:
Nominative زَيْدٌ; accusative زَيْدًا; genitive زَيْدٍ.
Type 2 — Sound feminine plural, مُسْلِمَات:
Nominative مُسْلِمَاتٌ; accusative مُسْلِمَاتٍ; genitive مُسْلِمَاتٍ.
Type 3 — Diptote, عُمَر:
Nominative عُمَرُ; accusative عُمَرَ; genitive عُمَرَ.
All three use ḍamma in nominative here, but they differ in their accusative and genitive patterns.