Определите функцию окончания –s в следующих
предложениях:
1. “I think of her, but she thinks only of him
And though it's only a whim, she thinks of him
Oh how long will it take
Till she sees the mistake she has made?
Dear what can I do?
Baby's in black and I'm feeling blue
Tell me, oh what can I do? “ (The Beatles)
2. “Success is not final, failure is not fatal: it is the courage to continue that
counts.”
(Winston Churchill)

s в конце глагола ставится при употреблении его с мужским,женским или средним родом.

Там,где стоит 's это сокращение от "is"