情态助动词：一种通常与另一个动词连用，用来表达可能性、必要性和许可等概念的动词，例如can、could、shall、should、ought to、will或would等。
an auxiliary verb (such as `can' or `will') that is used to express modality
同义词： modal auxiliary / modal
表动词语态的助动词-引用次数：2
参考来源情态助动词研究与对外汉语教学
epistemic modal auxiliary 认知用法的情态助动词 modal auxiliary verb 表动词语态的助动词 ; 情态助动词 Helping and Modal Auxiliary Verbs 助动词与语气助动词 ..