You ain't vs You didn't

Some examples from the web:

• You ain't my friend, palooka.
• You ain't woman enough for that song.
• You ain't no better than me, Scofield.
• You ain't good enough to fight me.
• You ain't even that good a cook.
• You ain't a man, Kramer.
• You ain't my deputy anymore.
• You ain't never been with no blonde.
• You ain't gotta tell him nothin'.
• You ain't the only fire truck in town.
• You ain't from around here no more.
• You ain't the State Department type.
• You ain't any better than me.
• You ain't the only one on parole.
• You ain't no boy, Jasper.
• You ain't the only sheriff ever lived.
• You ain't got to tell me about reality.
• You ain't never told me.
• You ain't got to worry about me no more.
• You ain't gonna do a thing.

Some examples from the web:

• You didn't second-guess my parenting.
• You didn't write the words.
• You didn't invent the downshift.
• You didn't kill him, sweetheart.
• You didn't have a bad start, this quarter.
• You didn't finish my dress.
• You didn't give up anything for this.
• You didn't catch his name? - No.
• You didn't let him get beat.
• You didn't... refuse to kill your own son.
• You didn't get much last night.
• You didn't check on the flight.
• You didn't do anything but sit down.
• You didn't call your dad for his birthday.
• You didn't leave your phone number.
• You didn't test anyone's will to live.
• You didn't reset the shields to the new angle.
• You didn't get any work done over vacation.
• You didn't understand what I wasNsaying about the analytic field.
• You didn't empty the pockets after wearing my clothes.