外研新高一版15 - 16上必修課件grammar

外研新標(biāo)準(zhǔn)高一版第二冊(cè)必修二Module3GrammarMusicwhen,while,as,before,after,till,until,since,once,assoonas,whenever時(shí)間狀語(yǔ)從句中的引導(dǎo)詞常見(jiàn)的如下：1.when和whenever引導(dǎo)的從句從句的動(dòng)作和主句的動(dòng)作可以同時(shí)發(fā)生，也可以先于主句的動(dòng)作而發(fā)生。Whenwegothome,itwasalreadydark.when從句中的動(dòng)詞既可以是短暫動(dòng)詞，也可以是延續(xù)動(dòng)詞。Ithoughtofitjustwhenyouopenedyourmouth.while從句中的動(dòng)詞只能是延續(xù)性動(dòng)詞。HetookabathwhileIwaswatchingTV.2.while和as引導(dǎo)的從句while表示“當(dāng)…時(shí)”，從句中的動(dòng)詞常用進(jìn)行時(shí)態(tài)，強(qiáng)調(diào)某一段時(shí)間內(nèi)主句和從句的動(dòng)作在同時(shí)發(fā)生。Whilewewerecleaningthewindows,theyweresweepingthefloor.as表示“在…過(guò)程中”或“一邊…一邊…”，主句和從句的動(dòng)作同時(shí)發(fā)生。As

she

sang,

the

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ran

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her

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3.before和after引導(dǎo)的從句before表示主句的動(dòng)作發(fā)生在從句動(dòng)作之前，after表示主句的動(dòng)作發(fā)生在從句動(dòng)作之后。Ididn'tknowanyEnglishbeforeIstartedschool.Afterhehadfinishedhiswork,heplayedchesswithhischild.4.till和until引導(dǎo)的從句表示“直到…”，主句和從句都為肯定式時(shí)，till和until都可用；表示“直到…才”，主句用否定式，從句用肯定式，一般用until。NotuntilIshoutedatthetopofmyvoicedidtheyequiet.Theyworkedtill/untilitwasmidnight.5.since和eversince引導(dǎo)的從句表示“自從…以來(lái)”，從句一般表示動(dòng)作的起點(diǎn)，用過(guò)去時(shí)；主句表示動(dòng)作延續(xù)的情況，一般用現(xiàn)在完成時(shí)或現(xiàn)在完成進(jìn)行時(shí)。如果主句表示的是時(shí)間，主句可用一般現(xiàn)在時(shí)，也可用現(xiàn)在完成時(shí)。Hehasbeenworkinghereeversinceheleftuniversity.Readthesentencesandanswerthequestions.1WhenitwasperformedinAmerica,therewasanaudienceof100,000people.2Whenhewasveryyoung,Mozarthadalotofmusicaltalent.3Whilehewasstillateenager,hewasabigstar.4Ashegrewolder,hebegantogodeaf.A.Whichofthesentencesreferstoasingleeventinthepast?B.Whichofthemreferstoaperiodoftimeinthepast?C.Whichofthemreferstoaprogressivechange?1234Matchthetwopartsofthesentences.1WhenMozartwasveryyoung,2Bythetimehewasateenager,3WhilehewasinVienna,4AsBeethovengrewolder,a.hefounditmoredifficulttocomposegoodmusic.b.helearnttoplaytheharpsichord.c