Unit6Whenwasitinvented？PeriodOne（SectionA1a-2c)情境引入fourgreatinventions:compasspapermakinggunpowderprinting情境引入Whenwasthe_____invented?Itwasinventedin________.18761885197119271976情境引入lightbulb1879Edison1.When____thelightbulb____?Itwasinventedin______.2.Who_____it_______by?It____________byEdison.3.Whatisit______for?Itisusedfor____people_____inthedark.情境引入Thekeys:1.was;invented;1879.2.was;invented;was;invented.3.used;helping;see.情境引入car1885Benz.Practice:Whenwasthecarinvented?Itwasinventedin1885.Whowasitinventedby?ItwasinventedbyBenz.What’situsedfor?It’susedfortraveling.A:Whatisthecomputerusedfor?B:ItisusedforstudyingWhatisthecalculatorusedfor?Itisusedforcalculating.情境引入Bell1876Beld1927Kelif1976Fen.Noyma1971情境引入Answerthequestionsbelow:Whenwasitinvented?Whowasitinventedby?What’situsedfor?PracticeListenandmatchtheinventionswiththedates.1876_______1885_______1927_______1971_______1976_______inventionshighheelsadjustable可调整的adjustableheelsicecreamscoopscoopheatedicecreamscoopinventionsinventionsslippersabatterybatteriesbattery-operatedslippersListening1.Listentothetapeandfinishthetask2aand2bofpage42.2.Makeconversationsusingtheinformationsin2b.情境引入ThePassiveVoice:被动语态被动语态的用法:1.不知道动作的执行者时，常用被动语态。eg:1）Mybikewasstolenyesterday.2)ThiscarismadeinAmerica.2.不必要说出动作的执行者时，常用被动语态。eg:Romewasnotbuiltinaday.3.为了突出强调动作的承受者时，常用被动语态。eg:Thousandsofbeachesarepolluted.情境引入ThePassiveVoice:被动语态主动语态变被动语态的步骤：1.把主动语态句中的动作的承受着变成被动语态句中的主语。2.把动词改为被动形式，即“be+动词的过去分词”。注意be动词要按新的主语的人称和数的变化而改变。时态要和原来的主动语态时态保持一致。3.原主动语态句中的主语，如果需要，就放在by的后面，要变成它相对应的宾格形式，如果不需要，可以省略。其它成分不变。被动语态的构成：主语+be+动词的.过去分词常见的几种时态的被动语态的句型。一般现在时：主语+be(am/is/are)+动词的过去分词+------.一般过去时：主语+was/were+动词的过去分词+------.一般将来时：主语+will/shall+be+动词的过去分词+------.含情态动词时其构成：主语+情态动词+be+动词的.过去分词.ThePassiveVoice:被动语态Exercises用所给单词的正确形式填空：1)Whenwasthetelephone_____(invent)?2)Thecomputercan____(help)usdomathproblems.3)Inthoseday,thewomancouldn't____(afford)aTVbecausetheywerereallyexpensive.4)Afriendof____(I)cametoseemelastweek.5)Ithinkyouneedto___(take)ahistoryclass.Thekeys:1)invented2)help3)afford4)mine5)takeHomework1.Writeapassageaboutanewinventionandintroduceit.2.Dosomerelevantexercises.Thankyou!
