Answer:
What can you catch but never throw?
I dance on one feet and knows only one shape. Someone with same name as me is very good with directions
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
I go up, let out a load and then go back down. What am I?
You can catch me but cannot throw me. What am I?
No matter how little or how much you use me, you change me every month.