Определите пожалуйста функцию окончания –s в словах (выделены большими буквами)

1. ―Friday night arrives without a suitcase
Sunday morning creeping like a nun MONDAY`S child HAS learned to tie his bootlace See how they run
2. ―We would shout and swim about
The coral that LIES beneath the VAVES
3. ―During TIMES of universal deceit, telling the truth BECOMES a revolutionary act