Answer:
What never ends but you always have it
When one does not know what it is, then it is somethingอพ but when one knows what it is, then it is nothing.
I always run but never walk, often murmur, never talk, have a bed but never sleep, have a mouth but never eat. Who am I?
What can point in every direction but can't reach the destination by itself
I cannot be used until I have been broken. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?