«كَمْ رَجُلًا ضَرَبْتَ؟»
Kam: in the accusative object position; rajulan: accusative tamyīz.
«بِكَمْ رَجُلًا مَرَرْتَ؟»
Kam: in the genitive position; rajulan: still accusative tamyīz.
«كَمْ شَهْرٍ صَوْمِي!»
Kam: nominative-position predicate; shahrin: genitive declarative tamyīz.
Kam can occupy nominative, accusative, or genitive positions while its visible form remains unchanged.