Unit3ThelnternetDiscoveringusefulstructures課件高中英語(yǔ)人教版2

Book3Unit3

PresentperfectpassiveGrammar&Usinglanguage被動(dòng)語(yǔ)態(tài)主動(dòng)語(yǔ)態(tài)被動(dòng)語(yǔ)態(tài)語(yǔ)態(tài)主語(yǔ)是動(dòng)作的執(zhí)行者主語(yǔ)是動(dòng)作的承受者M(jìn)anypeoplespeakEnglish.Englishisspokenbymanypeople.eg.被動(dòng)語(yǔ)態(tài)被動(dòng)語(yǔ)態(tài)的構(gòu)成：be+done(動(dòng)詞的過去分詞)be無(wú)詞義，但是有人稱、時(shí)態(tài)和數(shù)的變化主動(dòng)變被動(dòng)的步驟：①

找出句子中的主語(yǔ)和賓語(yǔ)②

交換位置③

把句子中的謂語(yǔ)動(dòng)詞變成bedone④

原來的主語(yǔ)前加by注意時(shí)態(tài)！被動(dòng)語(yǔ)態(tài)的常用用法Itissaidthat....Itisbelievedthat....Itisthoughtthat....Itisreportedthat....Itisknownthat.....被動(dòng)語(yǔ)態(tài)的注意事項(xiàng)被動(dòng)語(yǔ)態(tài)中還原to的情況seesb.dosth.hearsb.dosth.makesb.dosth.變被動(dòng)語(yǔ)態(tài)時(shí)sb.beseentodosth.sb.beheardtodosth.sb.bemadetodosth.總結(jié)規(guī)律一感：feel二聽：hear,listento三讓：make,let,have四看：see,watch,notice,observe變被動(dòng)語(yǔ)態(tài)時(shí)要還原to現(xiàn)在完成時(shí)過去發(fā)生的動(dòng)作，對(duì)現(xiàn)在產(chǎn)生的影響過去現(xiàn)在基本結(jié)構(gòu)：have/hasdone現(xiàn)在完成時(shí)怎么用？①

事情發(fā)生在過去并且結(jié)束，但對(duì)現(xiàn)在產(chǎn)生影響現(xiàn)在過去現(xiàn)在完成時(shí)怎么用？②

事情發(fā)生在過去一直持續(xù)到現(xiàn)在，有可能持續(xù)下去現(xiàn)在過去現(xiàn)在完成時(shí)的時(shí)間標(biāo)志1.already和yet都表示“已經(jīng)”，already用于肯定句中，yet用于否定句和疑問句IhavealreadyfinishedmyEnglishhomework.Ihaven’tfinishedmyEnglishhomeworkyet.HaveyoufinishedyourEnglishhomeworkyet?現(xiàn)在完成時(shí)的時(shí)間標(biāo)志2.for和sinceIhavereadthebookfortwomonths.Ihavereadthebooksince2018.for+時(shí)間段

（表示動(dòng)作持續(xù)了一段時(shí)間）since+時(shí)間點(diǎn)

（表示動(dòng)作開始于什么時(shí)候）現(xiàn)在完成時(shí)的時(shí)間標(biāo)志3.ever和never---Haveyoueverseenthemovie?---No,Ihaveneverseenit.多用于否定句和疑問句，分別表示“曾經(jīng)”和“從未”現(xiàn)在完成時(shí)的時(shí)間標(biāo)志4.常與現(xiàn)在完成時(shí)連用的時(shí)間狀語(yǔ)already/yet/just/ever/neverrecently/lately最近sofar迄今為止/bynow到目前為止/sincethen從那時(shí)起for+時(shí)間段since+時(shí)間點(diǎn)

現(xiàn)在完成時(shí)的句型①Itisthefirsttime/secondtimethat.....②Thisisthe+形容詞最高級(jí)+that.....eg:ItisthefirsttimethatIhavevisitedBeijing.eg:ThisisthebestfilmthatIhaveeverseen.從句用現(xiàn)在完成時(shí)現(xiàn)在完成時(shí)vs一般過去時(shí)

現(xiàn)在完成時(shí)：

與現(xiàn)在&過去有關(guān)一般過去時(shí)：

只與過去有關(guān)IhavelivedinBeijingfortenyears.IlivedinBeijingfortenyears.現(xiàn)在完成時(shí)的被動(dòng)語(yǔ)態(tài)have/hasdonebedone構(gòu)成：have/hasbeendone舉個(gè)例子Anallyhasbeenslain.一個(gè)敵人被擊殺了。Anenemyhasbeenslain.一個(gè)敵人被擊殺了。Youhaveslainanenemy你擊殺了一個(gè)敵人。Yourturrethasbeendestroyed.我方防御塔已被摧毀。Youhavebeenslain.你已被擊殺。Iguessyouhavebeenaskedaboutthetitleofyourbookbefore.Iguesssomeonehasaskedyouaboutthetitleofyourbookbefore.Newinventionslike3Dprintershavebeenusedtomakereplacemen