Question

ain't
 /ˈeınt/
  1 : am not
   I ain't worried.
  : are not
   They ain't interested.
  : is not
   It's a free country, ain't it?
  2 : have not
   Those people ain't got a clue.
  : has not
   Her husband left and she ain't never been the same.
  usage
  Ain't is usually regarded as an error, but it is common in the very informal speech of some people and it is also used in informal and humorous phrases.
   That joke just ain't funny.
   Say it ain't so!
   You ain't seen nothing yet!
   Two out of three ain't bad.
   If it ain't broke don't fix it!
   Things ain't what they used to be.
   Ain't that the truth?