Answer:
What force and strength cannot get through, I with my unique teeth can do. What am I?
I begin your sentences. What am I?
You are my brother, but I am not your brother. Who am I?
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 hold two meanings. With one I may be broken, with the other I hold on. What am I?
Whatโs a carpetโs favorite sport?