助动词 分类：动词 定义 帮助主要动词构成时态、语态、语气、疑问句和否定句的动词。 基本助动词 be have do 情态动词 can could may might must shall should will would 例句 He is working.(进行时) He has finished.(完成时) Do you like it?(疑问句) I don’t know.(否定句) 相关术语 情态动词 助动词 实义动词