"to be" or not "to be"

1   I a Moroccan student.

        
2 What you?
3 Bada a truck driver.
4 Ali's bike new.
5 Ali and I keen on video games.
6 You a student, aren't you?
7 Nadia my niece.
8 That car very expensive.
9 They from Marrakech.
10 Sabah rich but very mean.