The subjunctive mood, always weak in English, has been dwindling away for centuries until it has almost vanished. According to traditional thought, statements about the conditional future such as “If I were a carpenter . . .” require the subjunctive “were”; but “was” is certainly much more common. Still, if you want to impress those in the know with your usage, use “were.” The same goes for other pronouns: “you,” “she,” “he,” and “it.” In the case of the plural pronouns “we” and “they” the form “was” is definitely nonstandard, of course, because it is a singular form.[/b]