九年级英语 Unit 4 When was it invented 课件 鲁教版.ppt

unit4 whenwasitinvented sectiona talkaboutthehistoryofinventions thepassivevoice languagegoals grammarfocus 1b listenandmatchtheinventionswiththedates a b e d c 18761885192719711976 d a b e c 1c pairwork 1c pairwork whenwasthetelephoneinvented ithinkitwasinventedin1876 juliethompson battery operatedslippers chelsealanmon heatedicecreamscoop jaycecoziarandjamieellsworth shoeswithadjustableheels 2a listenandnumbertheinventionsintheorderthatyouhear 3 1 2 2b pairwork whowasit weretheyinventedby itwas theywereinventedbychelsealanmon 3b pairwork whatdoyouthinkisthemosthelpfulinvention ithinkthemosthelpfulinventionisthelightbulb whyisthat well itgivespeoplemoretimetoworkandplayeveryday thepassivevoice 被动语态 英语中动词有主动语态和被动语态两种语态 主动语态表示主语是动作的执行者 被动语态表示主语是动作的承受者 在被动语态中动作的执行者有时用by短语表示出来 被动语态的构成 助动词be 及物动词的 过去分词 一般现在时 一般过去时 thepassivevoice 被动语态 被动语态的用法 不知动作执行者时 常用被动语态 eg mybikewasstolenyesterday thiscarismadeinamerican 2 不必要说出动作执行者时 常用 eg romewasnotbuiltinaday 3 为了突出强调动作的承受者时 常用被动语态 eg thousandsofbeachesarepolluted 污染 thepassivevoice 被动语态 主动语态变为被动语态的步骤 把原主动句中的宾语转换为被动语态的主语 2 把动词改为被动形式 即 be 过去分词 注意be动词要按新的主语的人称和数进行变化 时态要和原来的主动语态的时态保持一致 3 原来主动语态句中的主语 如果需要 就放在by后面以它的宾格形式出现 如果没有必要就可以省略 其他的成分 定语 状语 不变 句式也不能变 thepassivevoice 被动语态 主动语态变被动语态的结构图 bellinventedthetelephonein1876 thetelephonewasinventedbybellin1876 主语 谓语动词过去时 宾语 时间状语 主语 谓语动词的过去分词 宾语 时间状语 thepassivevoice 被动语态 主动语态改被动语态 bell invented thetelephone in1876 was by homework students bookp70 part4 goodbye whenwasitinvented salty intheend bymistake byaccident accordingto 咸的 含盐的 名词 salty加y构成形容词 最后 终于 eg everythingwillbeallrightintheend 弄错的 错误地 eg hetooktheumbrellabymistake 偶然 意外 无意中 eg imetherbyaccidentinacrowdedbus 根据 按照eg we llbepaidaccordingtotheamountofworkwedo sour sweet sweet sweet crispy salty listenandcircle t fortrue or f forfalse thepotatochipswereinventedbymistake theywereinventedin1863 thecustomerthoughtthepotatoesweren tthinenough thecustomersaidtheyweren tsaltyenough georgewantedtomakethecustomerhappy thecustomerwashappyintheend tftftftftftf thehistoryofchips thatpotatochipswereinventedbymistake chipsbyachefcalledgeorgecrum theywereinventedin georgecrumcookedthemforalongtimeuntilthey andhesprinkledlotsofsaltonthemsotheywere didyouknow wereinvented 1853 werecrispy reallysalty whoinventedtea didyouknowthattea themostpopulardrinkintheworld afterwater wasinventedbyaccident althoughteawasn tbroughttothewesternworlduntil1610 thisbeveragewasdiscoveredoverthreethousandyearsbeforethat accordingtoanancientchineselegend theemperorshennongdiscoveredteawhenhewasboilingdrinkingwateroveranopenfire someleavesfromanearbybushfellintothewaterandremainedthereforsometime theemperornoticedthattheleavesinthewaterproducedapleasantsmell laterhedecidedtotastethehotmixture itwasquitedelicious andinthisway oneoftheworld sfavoritedrinkswasinvented readthearticleandwriteanswerstothequestions whatisthearticleabout itisabouttheinventionoftea itwasinventedoverthreethousandyearsago itwasinventedbythechineseemperorshennong itwasinventedbyaccident 3 whowasitinventedby 4 howwasitinvented 2 whenwasitinvented writeanarticleusingthenotesinthebox frompieplatetoflyingdisk theflyingdiskwasinventedbycollegestudents theyusedametalpieplatefromabakeryinbridgeport connecticut studentsatethebakery spiesandthenthrewthepieplates today thereareflyin