modal auxiliary verb表动词语态的助动词
Predicative modal auxiliary预测情态;侦缉司多式联运辅;表语模式助剂
aspectual-modal auxiliary事态
marginal modal auxiliary边际情态助动词;情态助动词
modal auxiliary word助词
modal auxiliary words情态语气词
Modal Auxiliary Verbs情态助动词;情态动词;三章
epistemic modal auxiliary认知用法的情态助动词