If I was vs If I were [duplicate]

if I were

This we call the second conditional utilising the subjunctive form, which can be used to discuss hypothetical/unreal situations.

If I were a cop, I would wear a uniform implies that I am not a cop and so I don't wear a uniform.

if it was

This would be the beginning of a question about a past event, for example:

If it was raining, why did you go out? meaning that it rained and you went outside; the speaker is questioning your motives.

Hope that helps

+1 Karl

But as to correctness, both are "correct".

There is also:

• Were I a cop, I would wear a uniform.

I think "were I" sounds very elegant, especially the passive "Were I to be". I'd like to find opportunity to use this in speech and get away with it without it sounding forced.