I were or I was ?

Both are correct.

If I were / I wish I were is more formal.

We usually use was in informal language.

Regards

Uhm, it should be If I 'were' a boy.

Indeed it is plural, and 'i' is singular but the Pronouns 'you' and 'i' are considered plural, so: You are beutiful, If 'i' were' you, 'you' are the apple of my eyes, etc

hope 'i' helped

when should I use 'I was' then? little confusing.

Funny I sometimes have trouble with was or were also. Recently when I came across the problem, I used was in a different sentence and realized it didn't sound right. Example, You was running down the road, lol...it made me see were is the correct answer.

when come singular use was

I think "I was" is wrong. You shouldn't use 'was' in the pronouns 'you' and 'i'.

Oh dear.

There is a LOT of misinformation in this thread.

In a simple sentence:

I was

You were

He/she/it was

We were

You all were

They were

So, in simple sentences, only "I" and "he" take "was."

It is completely incorrect to say that "I was" is wrong!

I "were"

for situation that is not real or just in the dreams.

Ex: "If I were a boy...(Beyonce is a girl) or If I were rich (I'm poor)."

... which, interestingly, in this case, doesn't necessarily convey past tense. Contrasting "they are" and "they were," obviously one is present and the other is past. But both was and were, when applied to "I", can be present tense in the subjunctive.

English are a fascinating language. :-P

Contrasting "they are" and "they were," obviously one is present and the other is past.

Oh, gosh, more misinformation has just been added to this thread.

If they were here, I would be yelling at them right now. (present)