Answer:
I have six faces but not even one body connected 21 eyes in total but cannot see.
I will disappear every time you say my name.
I am the place where yesterday is always before today. What am I?
I start new then become old. Start clean but be one dirty. I usually start big then become little.
I'm a kind of cup that doesn't hold water, but makes a lot of noise repeatedly. What am I?
When is it bad luck to see a black cat?