Would've is a contracted form of would have, used to express a hypothetical or conditional action in the past. It functions as a modal verb plus auxiliary, typically pronounced with a reduced vowel in the would and a light, almost-elided form for have. In everyday speech, it often sounds like /ˈwʊd•əv/ or /ˈwʊdˌəv/ depending on rhythm, with the second element very concise. The pronunciation favors quick unity of the two morphemes in fluent speech.
Full pronunciation guide
