If I Was vs. If I Were: What's the Difference?
Quick Answer
if I was = real, possible past situations
if I were = subjunctive mood — hypothetical, unreal, or wishful situations
Explanation
IF I WAS (real/possible)
Describes a genuine past possibility, not known to be false
"If I was rude, I'm sorry." (maybe I was)
"If I was late, it wasn't intentional."
IF I WERE (subjunctive)
Hypothetical, imaginary, or contrary-to-fact
"If I were you, I'd quit." (I am not you)
"If I were rich, I'd travel." (I'm not rich)
Quick test: Is the situation impossible or clearly untrue right now (a wish, advice, a fantasy)? Use were. Is it a real, uncertain possibility — especially about the past? Use was.
Examples
Common Mistakes
Incorrect: If I was you, I would take the job.
Correct: If I were you, I would take the job. (hypothetical — you can never literally be "you")
Incorrect: If I were late this morning, I apologize.
Correct: If I was late this morning, I apologize. (real, uncertain possibility)
Practice
Choose the correct form:
"If I _____ taller, I would play basketball. If I _____ rude during the call, please forgive me."