A Brief Analysis of Modal Auxiliary Verbs Being Used with Infinitives Perfect Tense
情态动词与不定式完成式的连用解析
属类：行业术语-中文论文标题
What are the two major semantic categories of modal auxiliaries?
情态助动词从语义来看分为哪两大类？
属类：英汉句库-blog.hjenglish.com
|noun|
1.an auxiliary verb (such as can, must, might, may) that is characteristically used with a verb of predication and expresses a modal modification and that in English differs formally from other verbs in lacking -s and -ing forms
|noun|
