助动词 auxiliary verb ; do ; auxiliary ; aux

情态助动词 modal verb ; Modal Auxiliaries ; must

助动词和情态动词 Auxiliaries and modal auxiliaries ; Auxiliary Verb and Modal Verb ; Hilfs-und modal verb ; Auxiliaries and modal verbs

应为助动词 be

语气助动词 Modal Auxiliaries ; Modal Auxiliary

又称为情态助动词 Model Auxil-iaries

句首助动词 preverb

基本助动词 PrimaryAuxiliaries

表动词语态的助动词 modal auxiliary verb

辅助动词 Auxiliary Verbs ; subsidiary verb