هَاتَانِ مُعَلِّمَتَانِ.
Translation: These are two female teachers.
هَاتَانِ: nominative dual subject with alif; مُعَلِّمَتَانِ: nominative predicate with alif.
رَأَيْتُ هَاتَيْنِ الْمُعَلِّمَتَيْنِ.
Translation: I saw these two female teachers.
هَاتَيْنِ: accusative dual demonstrative with yāʾ; الْمُعَلِّمَتَيْنِ: accusative apposition with yāʾ.
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Demonstratives — forms, syntax and usage
هَاتَانِ مُعَلِّمَتَانِ.
Translation: These are two female teachers.
هَاتَانِ: nominative dual subject with alif; مُعَلِّمَتَانِ: nominative predicate with alif.
رَأَيْتُ هَاتَيْنِ الْمُعَلِّمَتَيْنِ.
Translation: I saw these two female teachers.
هَاتَيْنِ: accusative dual demonstrative with yāʾ; الْمُعَلِّمَتَيْنِ: accusative apposition with yāʾ.