I know that I should write "I were" in the following sentence, but I wonder whether writing "I was" is grammatically acceptable.
I'd prepare well for the interview if I was in your shoes because I heard that they have a tough one.
I know that I should write "I were" in the following sentence, but I wonder whether writing "I was" is grammatically acceptable.
I'd prepare well for the interview if I was in your shoes because I heard that they have a tough one.
I'd prepare well for the interview if I was/were in your shoes because I heard that they have a tough one
It is just a matter of style. "If I was" is widely accepted as informal standard English and many native speakers find it idiomatic.
"Were", on the other hand, is highly formal and more commonly written than spoken. In A Student's Introduction to English Grammar, Huddleston and Pullum describe it as an untidy relic of an earlier system:
The irrealis mood form is unique to be, and limited to the 1st and 3rd person singular. It is an untidy relic of an earlier system, and some speakers usually, if not always, use preterite was instead. (p. 59)