• got|ta /g'ɒtə/
  Gotta is used in written English to represent the words 'got to' when they are pronounced > informally, with the meaning 'have to' or 'must'.
  Prices are high and our kids gotta eat.
• wan|na /w'ɒnə/
  Wanna is used in written English to represent the words 'want to' when they are pronounced informally.
  I wanna be married to you. Do you wanna be married to me?
• gon|na /g'ɒnə, AM g'ɔːnə/
  Gonna is used in written English to represent the words 'going to' when they are pronounced informally.
  Then what am I gonna do?