كَـ«مُسْلِمَاتٍ»؛ تَقُولُ: «جَاءَتْنِي مُسْلِمَاتٌ، وَرَأَيْتُ مُسْلِمَاتٍ، وَمَرَرْتُ بِمُسْلِمَاتٍ».
Translation: For example, “Muslim women.” You say: “Muslim women came to me; I saw Muslim women; and I passed by Muslim women.”
The same noun serves three different syntactic roles: subject, direct object, and a noun governed by a preposition. Its case follows the role, not just the visible vowel.