I think they both acceptable, but which one you recommend me to use in conversation.
If he were/was an elephant.
Isn't were sounds too formal/oldfashioned?
I think they both acceptable, but which one you recommend me to use in conversation.
If he were/was an elephant.
Isn't were sounds too formal/oldfashioned?
I don't think 'were' sounds too formal or too old-fashioned. So you should feel free to use 'were' for hypothetical conditionals.
That said, I've heard native speakers use 'was' instead of 'were' in conversations for the third person singular subject (e.g., he, she, it, etc.) or the first person singular "I". Actually, it seems that more people are saying "was" instead of "were" at least in informal conversations.
One caveat, though, might be using 'was' for a set phrase like "If I were you". Since this phrase has been used so often that using 'was' here wouldn't sound terribly natural.