高中英语 grammar unit3 book5 新人教版必修5.ppt

Unit3LifeinthefutureGrammarPastparticiple(3)usedasAdverbial&Attribute过去分词过去分词与现在分词作状语
过去分词表完成、被动,与主句主语之间是被动关系;现在分词表进行,主动,与主句主语之间是主动关系。如果一个被动的动作发生在谓语动词之前,则可使用现在分词的完成被动式或过去分词。过去分词表完成、被动,作状语时,其逻辑主语是主句的主语,且与主语之间存在着被动关系。过去分词作状语可表时间,原因,让步,结果,方式,条件等。观察下列的句子:过去分词作时间状语2.Whenitisseenunderamicroscope,afreshsnowflakehasadelicatesix-pointed.
Seenunderamicroscope,afreshsnowflakehasadelicatesix-pointedshape.过去分词作原因状语2.Becauseitwasdoneinahurry,hishomeworkwasfullofmistakes.
Doneinahurry,hishomeworkwasfullofmistakes.过去分词作条件或者假设状语2.IfIamcomparedwithyou,westillhavealongwaytogo.
Comparedwithyou,westillhavealongwaytogo.作方式或伴随情况状语2.Shesatbythewindow,lostinthought.
Shesatbythewindow,andshewaslostinthought.
lost表示一种迷失心理状态1)过去分词在句子中可以作时间状语、原因状语、伴随状语、条件状语和让步状语等。
2)过去分词作状语时,过去分词的逻辑主语与句子主语一致。过去分词作状语:Rewritewithproperconjunctions2.Askedwhathadhappened,hetoldusaboutit.
→Whenhewasaskedwhathadhappened,hetoldusaboutit.
3.Wellknownforhisexpertadvice,hereceivedmanyinvitationstogivelectures.
→Becausehewaswellknownforhisexpertadvice,hereceivedmanyinvitationstogivelectures.4.Givenmoretime,wewouldbeabletodotheworkmuchbetter.
Ifweweregivenmoretime,wewouldbeabletodotheworkmuchbetter.
5.OncetranslatedintoChinese,thebookbecameverypopularamongChineseteenagers.
OnceitwastranslatedintoChinese,thebookbecameverypopularamongChineseteenagers.6.Deeplyinterestedinmedicine,shedecidedtobecomeadoctor.
Becauseshewasdeeplyinterestedinmedicine,shedecidedtobecomeadoctor.
7.Leftaloneathome,Samdidnotfeelafraidatall.
Althoughhewasleftaloneathome，Samdidnotfeelafraidatall.用过去分词作状语来改写句子。2.Ifheisgiventime,he’llmakeafirst-classtennisplayer.
→_________,he’llmakeafirst-classtennisplayer.
3)AsIwasconfusedbythenewsurroundings,Iwashitbythelackoffreshair.
→______________________________,Iwashitbythelackoffreshair.4)Whenhewasquestionedbythepoliceaboutthefire,hebecametense.
→________________________________,hebecametense.Findoutthesentenceswithsamemeaning.2.WhileIwasconfusedbythenewsurroundings,Iwashitbythelackoffreshair.
Confusedbythenewsu