1）dare用作实义动词,此时其后的动词不定式可带to也可不带to,且dare有人称和数以及时态的变化.例如：Idaretojumpdownfromthetopofthewall.我敢从那墙头上跳下来.Shedoesn'tdare(to)meetherteacher'seyes.她不敢与老师对视.2）dare用作情态动词,后跟动词原形,主要用于疑问句、否定句和条件句中.例如：Howdareshedothingslikethattome?她怎么敢对我做那种事?-Dareyoucatchthemouse?你敢去抓那只老鼠吗?-Idaren'tdothat.我不敢抓.