A common example is "udon ni narimasu" (literally "[this] becomes udon", "[this] will be udon") as a polite form of "udon desu" ("[this] is udon"), instead of the standard "udon de gozaimasu" ("[this] is udon (polite)")—this manual keigo form is often criticized on the basis that the udon is not "becoming" anything, and therefore "ni naru" is incorrect, both as keigo and more generally.