@tanguatlay,
Quote:As an American, I can tell you that most people in the US would never use 'an' when speaking and would tell you not to use it in writing either (regardless of whether or not such advice is technically correct).
Just as in your other example, Ms Tan, it's possible to use 'will' but this type of situation being talked about does, in the speaker's mind, lean a bit more to the hypothetical side.
The speaker is saying, "in those instances when ..."
Regarding the veracity of the statement, the speaker may be overstating the case, but in fast speech, the 'n' in 'an' is ellided, so we could hear,
D'ya wan a apple?
D'ya have a orange?