Contractions are very regional and a product of spoken English which varies quite a lot from place to place. For example, I use contractions that I don’t see people around me using like: y’all (plural 2nd person pronoun that’s missing in official English speech; verbs are conjugated the same as 2nd person singular forms), shouldn’t’ve, gonna (going to/ going to want to), wanna (want to), that’re, then’ll, then’re etc.