Answer:
A hundred arms, a thousand fingers, but I have no eyes to see where I linger. What am I?
What is harder to catch the faster you run?
What runs around the whole yard without moving?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
I can be swallowed But I can also swallow you.
No matter how little or how much you use me, you change me every month.