The spelling of "ise" versus "ize" can be a point of confusion for English learners. In fact, both spellings are correct and are used interchangeably in various English-speaking countries. The pronunciation of the suffix "-ise/-ize" is the same in both cases - /aɪz/ - with the "s" or "z" at the end being a matter of preference or convention. So whether you choose to spell it "ises becoming" or "izes becoming", your pronunciation will remain the same.