实义动词;eat,run.drink.look.listen.等情态动词can could will would shall should may might must need ought 助动词 am is are was were been do does did done介词 in on to under below up for off down 等副...
实义动词:很多。例如eat walk drink take have do sleep fly sweep drive ride 等等 助动词:do(does,did,done,构成疑问句与否定句)be(is,am,are,was,were,been,构成系表结构)have(has,had,had,构成完成时) 情态动词:can,may,must,should,ought to,c...