Unit 6 Earth First Understanding ideas 阅读课件-高中英语外研版（2019）必修第二册.pptx

Unit6Earthfirst

Understandingideas;Sharks:Dangerousor

Endangered?;Bytheendofthisclass,youareexpectedtobeableto:

guessthewritingpurposeofthepassagebyanalyzingthemeaningofthetitle.

analyzethestructureofthepassagebysummarizingthemainideaofeachparagraph.

brieflytalkabouthowpeople’sattitudestowardsanimalsareaffectedbyfilmsorbookswiththehelpofthephrasesandexpressionswelearnedduringclass.;Whatsyourfavoriteseaanimal?Doyouknowanythingaboutsharks?Sharethemintheclass.;Thereareoverthreehundreddifferentspeciesofshark.Theunusualthingaboutallthesefishisthefactthattheyhavenobones!Theirentireskeleton(骨架)ismadeupofcartilage(软骨).Differentsharkshavedifferentshapesofteeth.Thegreatwhitesharkhasverysharpteeththatareabletotearbigpiecesofitsprey(猎物).Mostofsharksfeedonseacreatures(生物)likefish,squid(鱿鱼)andcrabs(蟹).Thegreatwhitesharkhasbeenknowntoeatseals(海豹).;Sharkshaveexcellentsight.Theyalsohaveaverygoodsenseofhearingandpickupsoundsofstrugglingfishfaraway,soundsthatwouldnotbeheardtothehumanear.Theyalsohaveaverykeensenseofsmellandareattractedbythesmellofbloodcomingfromaninjuredfish.?????;Whatsyourfirstimpressionofsharks?;Brainstorm:

Whatwillyouthinkofwhenwetalkaboutsharks?;HaveyoueverseenthefilmJaws?

Introducetheplotofthefilm.;Lookatthetitleandthepictureandpredictwhatwillbetalkedaboutinthepassage.;Choosetheauthor’spurposeinwritingthepassage.;可以通过文章的体裁来大致确定作者的写作目的。例如：

P(Persuade):报纸上的社论或广告大多以说服读者为目的；I(Inform):教科书、百科全书、字典、食谱或产品说明书等图书或文章多以告知读者信息为目的；E(Entertain):童话、漫画或小说等图书多以娱乐读者为目的。;还可以通过一些问题来确定作者的写作目的：

P(Persuade):Didtheauthortrytochangeyourmind?Didtheauthortrytomakeyoudoorbelievesomething?

I(Inform):Didtheauthortrytoshareinformationwithyou?Didtheauthorteachyousomethingnew?Didthe