何不……

何不…… means "why not" and follows the frame 何不 A. Use it when the sentence needs to make a suggestion: why not do A. Pay attention to register: many patterns in this group are formal, evaluative, or rhetorical, so they are stronger than everyday words. Do not choose a pattern only because the translation looks close; check whether the sentence is evaluation, sufficiency, inevitability, suggestion, or rhetorical affirmation/denial. Common mistakes include dropping fixed characters such as 于, 是, 不, 能, 非, confusing 不如, 何必, 为什么不, or using a rhetorical pattern in a neutral statement.