Answer:
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
I am the kind of nut that is empty at the center and has no shell.
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
Break me and I am better, immediately set and harder to be broken again. What am I?
I can be sweet or sour. I do not rhyme with any other word
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic