a problem needed 2 be solved can u tell me how 2 use "ain't",which can be found in many english songs."You are, my fire, The one, desire, You are (You are, You are, You are...) Don't wanna hear you say, Ain't nothin' but a heartache, Ain't nothin' but a mistake, "，from 《I want it that way》by Backstreet Boys Thank u!