Answer:
I begin your sentences.
Tear off my skin. I won't cry, but you will. What am I?
I am the kind of ant that's good at math.
You are my brother, but I am not your brother. Who am I?
My teeth are sharp my back is straight to cut things up it is my fate.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?