Unit-3-Computers-语法

Unit3Computers语法现在完成时1.现在完成时的结构：Hehasfinishedhishomeworkalready.否定→Hehasnotfinishedhishomeworkyet.一般疑问→Hashefinishedhishomeworkalready?肯定回答→Yes,hehas.否定回答→No,hehasn't.特殊疑问句→Whathashedonealready?have/has+动词的过去分词（v-ed）___________________________________()否定疑问都是在has或have上变化。Ihavebeenastudentsincetwoyearsago.否定句→一般疑问句→肯定回答：Yes,Ihave.否定回答：No,Ihaven't.be--(amisare)--(waswere)--beenIhaven'tbeenastudentsincetwoyearsago.Haveyoubeenastudentsincetwoyearsago?原形一般现在式一般过去式过去分词练习,用have或has的正确形式填空1.I__________livedinBeijingfortenyears.2.He_________studiedheresincetwoyearsago.3.They_________finishedtheirworkalready.4.Inthepastfiveyears,Tom_________workedasaworker.5.________youeverbeentoBeijing.6.She_______notfinishedherhomeworkyet.havehashavehasHavehas主语是第三人称单数用has，其他人称用have。1.I__________________(live)inBeijingfortenyears.2.He_______________(study)heresincetwoyearsago.3.They_________________(finish)theirworkalready.4.Inthepastfiveyears,Tom_______________(work)asaworker.5.________youever________(be)toBeijing.6.She___________________herhomeworkyet.havelivedhasstudiedhavefinishedhasworkedHavebeenhasn'tfinished被动语态1.被动语态的结构主动语态：Ifinishmyhomework.被动语态→Myhomeworkisfinishedbyme.be+动词的过去分词（v-ed）________________be动词的过去分词notdon't练习：用be的正确形式填空1.theapple________eatenbyTom.2.Manyapples__________eatenbyTom.3.Theapple________eatenbyTomyesterday.4.Manyapples________eatenbyTomyesterday.5.Theapplewill_________eatenbyTomtomorrow.6.Manyappleswill_____eatenbyTomtomorrow7.Theapplehas_______eatenbyTomalready.8.Manyappleshave_______eatenbyTomalready.eat-ate-eatenisarewaswerebebebeenbeen现在完成时的被动语态现在完成时：have/has+动词的过去分词（v-ed）被动语态：be+动词的过去分词（v-ed）现在完成时的被动语态have/has+been+动词的过去分词研究下面的句子，把用到被动语态的地方画出来1.OvertimeIhavebeenchangedquitealot.2.FirstasaPCandthenasalaptop,Ihavebeenusedinofficesandhomessincethe1970s.3.Sincethe1970smanynewapplicationshavebeenfoundforme.4.Ihavealsobeenputintorobotsandusedtomakemobilephonesaswellashelpwithmedicaloperations.5.IhaveevenbeenputintospacerocketsandsenttoexploretheMoonandMars.研究下面的句子，把用到被动语态的地方画出来1.OvertimeIhavebeenchangedquitealot.2.FirstasaPCandthenasalaptop,Ihavebeenusedinofficesandhomessincethe1970s.3.Sincethe1970smanynewapplicationshavebeenfoundforme.4.Ihavealsobeenputintorobotsandusedtomakemobilephonesaswellashelpwithmedicaloperations.5.IhaveevenbeenputintospacerocketsandsenttoexploretheMoonandMars.现在完成时的被动语态被动语态练习：主：Snowhascoveredthegroundforweeks.被：Theground__________________________bysnow.主：Youhavefinishedthisworksincetwodaysago.被：Thiswork______________________sincetwodaysago.主：Theyhavesoldtenhousesinthepastonehour被：Tenhouses_____________________inthepastonehour.hasbeencoveredhasbeenfinishedhavebeensold现在完成时被动语态的练习1.--Thewindowisdirty.--Iknow.It_______fortendays.A.hasn'tcleanedB.didn'tcleanC.wasn'tcleanedD.hasn'tbeencleanedDD2.Thoughwedon'tknowwhatwasdiscussed,yetwecanfeelthetopic_________.(讨论)A.hadchangedB.willchangeC.waschangedD.hasbeenchanged现在完成时的被动语态主语+have/has+动词的过去分词（v-ed）主语已经被...1.课本P100页，背诵从arise到bring的变化形式。2.名校学案，P32（第1,4,5,7,9）示意某人用这种方法鼓励某人做...与...对抗决定做...在...帮助下在某种程度上what...dowith=How...dealwithlookat:看...watchfor:留意...watchover:看管lookfor:寻找...inaway:在某种程度上ontheway:在路上bytheway:顺便说一下intheway:挡路，妨碍signal:信号chance:机会mark:标记measure:措施let/makesbdosth.让某人做...signalsbtodosth.示意某人做...callsbtodosth.叫某人做某事anyhow:无论如何however:尽管如此Thus:然而therefore:因此really:真地such...that如此...以至于...too:太so...that...如此...以至于...名词形容词或副词asaresultof=becauseof因为ontopof在...顶部infrontof在...前面inneedof需要...