Question

Sometimes I am a sphere, sometimes i am a banana, and sometimes i am not there at all. What am I

Answer 1

Your a moon

Explanation:

you described phases of the moon

Answer 2

First off, capitalize that "I" please.Secondly, you are a moon.

Reason:A full moon is a sphere, a crescent moon looks like a banana, and sometimes you can't see the moon at all.