河南省九年级英语上册 unit 9《When was it invented》Section A精品课件 人教新目标版.ppt

九年级新目标 unit9whenwasitinvented sectiona whichdoyouthinkisthemostimportantinventionintheworld whatothercanyouthinkof tv telephome radio computer caculator car doyouknowwhatarethey computer radio television calculator telephone car 1a groupwork lookatthethingsbelow inwhatordersdoyouthinktheywereinvented numberthem 1 5 5 2 4 1 3 1b listenandmatchtheinventionswiththedates 1885 1976 a b 1971 1876 c d 1927 e accordingtowhatyouhavelistened answerthequestionsbelow 1 whatdidthegrandmahavewhenshewasyoung 2 whydidn ttheyhaveatelevisionatthattime 3 doesgrandmahavepersonalcomputernow telephoneandcar becauseitwasexpensive yes shedoes 1c pairwork whenwasthecomputerinvented ithinkitwasinventedin1976 shoeswithadjustableheels it susedforscoopingreallycoldicecream right itwasinventedbychelsealanmon battery operatedslippers heatedicecreamscoop 2a listenandnumbertheinventionsintheorder 3 1 2 2b listenagainandmatchtheitemsincolumns 2c pairwork whatisitusedfor itisusedforseeinginthedark 3a hateitorlikeit alarmclock camera lightbulb herbicide microwaveoven refrigerator vediographyingmachine airconditioner plasticbag canyouthinkofothers 3b pairwork a whatdoyouthinkisthemosthelpfulinvention b ithinkthemosthelpfulinventionisthecomputer a whyisthat b becauseithelpsmesearchtheinformationthatineed 4 groupwork imaginethatyouarealoneonatinyisland choosefiveinventionsyouwouldliketohaveontheislandwithyou a i dliketohavearadiobecauseicouldlistentomusicallday b yes butthat snotgoingtohelpyouleavetheisland ithinkitwouldbebettertohaveatelephone explanation 1 it susedforscoopingreallycoldicecream beusedfor意为 被用来 强调用途或作用 e g thedusterisusedforcleaningtherooms beusedas意为 被当作 来用 强调被当作工具或手段来用 beusedby意为 被 使用 强调使用者 e g thebigboxisusedasatable thecarisusedbyourmanager 2 shoeswithadjustableheelswereinventedby 1 with是介词 意为 具有 持有 带有 e g agirlwithlonghairahousewithablueroof 2 adjustable意为 可调整的 可调节的 e g ihaveapairofshoeswithadjustableheels 3 invent是动词 意为 发明 创造 e g edisoninventedthelightbulb invention是名词 发明 发明物 e g edisonhadabout2 000inventionsduringhislifetime 3 battery operatedslipperswereinventedby operate用法 1 操作 e g canyouoperatethecomputer 2 起作用 见效果 e g thesleepingpilloperatedatonce 3 经营 管理 e g thecompanyoperatestenfactories 4 动手术 e g thedoctorwilloperateonhismothernextweek 4 annoyingadj 讨厌的 恼人的 往往指事物 e g howannoyingitis 真讨厌 annoyedadj 生气的 恼怒的 往往指人 e g myfatherisannoyedwithme 爸爸在生我气 5 helpfuladj 有帮助的 有益的e g mr whiteisaveryhelpfulman 构词法 n ful adje g use ful usefulthank ful thankfulbeauty ful beautifulcare ful careful 6 imaginethatyouarealoneontinyisland aloneadj 意为 单独的 不带感情色彩 e g whenhiswifedied helivedalone lonelyadj 意为 孤独的 寂寞的 e g hefeelslonelywhenheisalone lonely指地方时表示 荒凉的 偏僻的 e g theoldmanlivesinalonelysmallvillage 7 ithinkitwouldbebettertohave 1 would在此处表示 料想或猜想 揣测 后接动词原形或完成式 e g whatwouldshebedoingthere 2 itisbettertodosth 最好做 it是形式主语 动词不定式是真正的主语 e g itisbetterforyoutowalktoschool itisbettertodosth hadbettertodosth grammarfocus thepassivevoice 一 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 二 被动语态的构成助动词be 及物动词的过去分词am is are done一般现在时was were done一般过去时 三 被动语态的用法1 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 四 主动语态变为被动语态的步骤 theyspeakenglish 主语谓语宾语englishisspokenbythem 主语谓语动词的过去分词宾语 1 主动语态的宾语变成被动语态的主语 2 主动语态的谓语动词变为被动语态的谓语动词 即 be 及物动词的过去分词 be有时态 人称和数的变化 3 主动语态的主语变为by的宾语 主动语态变为被动语态的步骤 主动语态改被动语态 bell invented thetelephone in1876 was by 五 被动语态的时态表示被动语态的时态一般只通过be表现 过去分词不变 例如 一般现在时 thetreesareplantedbythefarmers 一般过去时 thetreeswereplantedbythefarmers 现在进行时 thetreesarebeingplantedbythefarmers 一般将来时 thetreeswillbeplantedbythefarmers 现在完成时 thetreeshavebeenplantedbythefarmers 含情态动词的被动语态 thetreescan must should beplantedbythefarmers 六 被动语态的几种句型 肯定句主语 be 过去分词 by asweetsongwassungbyheronthestage 否定句主语 be not 过去分词 by asweetsongwasn tsungbyheronthestage 一般疑问句be 主语 过去分词 by wasasweetsongsungbyheronthestage 特殊疑问句疑问词 be 主语 过去分词 by wherewasasweetsongsungbyher theyproducedthatkindofcar theworkersbuiltabridgeovertheriver mothertellsmeastoryeveryday 请把下列主动句变为被动句 thatkindofcarwasproducedbythem abridgewasbuiltbytheworkersovertheriver iamtoldastorybymothereveryday 1 thewomanaskedthepolicemanforhelp 2 theoldmanontvtellsastoryonsunday 3 dotheyusetheboxasatable 4 shesentmeacollectionlastweek 5 theteacherdoesn tteachusmaththisterm 练习 请把下列主动句变为被动句 6 didlilybuyhersisterahat 7 weoftenhearhimplaythevi