Answer:
I am what no man ever yet did see, which never was, but always is to be. What am I?
What jumps when it walks, but sits when it stands?
I have a lot to say but can't be heard because I can't speak one single word. What am I?
The faster you run the harder it is to catch me
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.