I seen vs. I saw
Incorrect: “I seen the movie last week.”
Correct: “I saw the movie last week.”
2) I been vs. I have been
Incorrect: “I been there!”
Correct: “I have (I’ve) been there!”
3) I done vs. I did
Incorrect: “I done the homework.”
Correct:”I did the homework.”
4) We was vs. we were
Incorrect: “We was just about to start the reading.”
Correct: “We were just about to start the reading.”
5) I would of vs. I would have
Incorrect: “I would of gone with you if I knew.”
Correct:”I would have (would’ve) gone with you if I had known.”
Source: Grammarly