Answer:
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What is part of you and all around you but if it entangles you, it will kill you?
I have one eye, See near and far, I hold the moments you treasure, And the things that make you weep.
What has a hundred limbs, sometimes leaves, but cannot walk?
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
I am a room that has a roof but no walls. What am I?