Answer:
Use me to reward good behavior.
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
Although a human shape I wear Mother I never had; And though no sense nor life I share in finest silks I'm clad. By every miss I'm valued much beloved and highly prized; still my cruel fate is such by boys I am often despised.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
Tear me off and scratch my head what once red is now black.
I always have to work with something in my eye. What am I?