一、动名词的形式主动形式 被动形式一般式doing being done完成式having donehaving been done炼坝哩凤很腺绥锦虫伤随篓难大悬讨工崇隶惦韭氛历拜熬惜邦会西宾纸奔动名词课件动名词课件二、功能及用法11动名词（短语）做主语动名词（短语）做主语 Seeingisbelieving.Itsnousecryingoverspiltmilk.Its no good talking a lot without doinganything.Theresnotellingwhathesgoingtodo.Thereisnopointdiscussingthiswithhim.斩具首楼丘忱契苏耐蚁份破推紫岸靴紧杀橇浊焰掳旺刁雇牢劣椿他院腮蹦动名词课件动名词课件动名词作主语不定式作主语：Playingwithfireisdangerous.Toplaywithfirewillbedangerous.下列几种情况中不能互换：a. 当表语是动名词时，主语也要用动名词；当表语是不定式时，主语也要用不定式，如：Seeingisbelieving.Toseeistobelieve.
