Answer:
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I am expelled from you orally with a sound
You turn me over after you have travelled far.
I go around a yard but do not move. What am I?
If you lose me, you may cause people around you to lose me too. What am I?
Give it food and it will live, give it water and it will die.