Unit4AmazingScienceTopic1SectionD學習導航重點研討課堂小結當堂檢測學習目標新知學習新知學習重點研討課堂小結當堂檢測學習目標

LanguageGoal能熟悉并正確運用本課時的重點單詞和短語能歸納總結一般過去時的被動語態能用英語談論GPS的用途新知學習重點研討課堂小結當堂檢測學習目標Thestarsintheskyweregoodguidingmarks.Wecouldusethestarstofindoutwherewewere.Wherewerewe?新知學習重點研討課堂小結當堂檢測學習目標Whatcanyoudoifyouloseyourcellphone?Let’susetheGPS.新知學習重點研討課堂小結當堂檢測學習目標WhatisaGPS?

GPSislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.新知學習重點研討課堂小結當堂檢測學習目標GPScanbeusedinmanyfields.新知學習重點研討課堂小結當堂檢測學習目標1.Howdidtheearlyexplorersknowwheretheywere?Theyfoundoutwheretheywerebyusingstars.2.What’sthedisadvantageofusingthestarsasguidingmarks?Itsdisadvantageisthatitdidn’tworkwellwhentheweatherwasbadandthestarscouldnotbeseen.3.WhatisaGPS?Isitusefultouse?Itislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Itisveryuseful.4.WhatdoyouthinktheGPSwillbeusedforinthefuture?…ReadthepassageanddiscussthequestionsonPage88.新知學習重點研討課堂小結當堂檢測學習目標WhereAreWe?Wherearewe?Thatwasabigquestionwhenwefirstexploredourworldlongago.Theearlyexplorersfoundthatthestarsintheskyweregoodguidingmarks.Usingthestars,theycouldfindoutwheretheywereandinwhichdirectiontheyweregoing.Thismethodworkedwellatnightaslongastheweatherwasgoodandthestarscouldbeseen.Butitdidn'tworksowellduringtherestofthetime.Thatwasaproblem.新知學習重點研討課堂小結當堂檢測學習目標

Today,theproblemhasbeensolvedbytheGlobalPostitoningSystem(GPS).Itislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Itcanalsobeusedtostudytheshapeoftheearth.TheGPSisagreatinventionthathelpsusexploreourplanetanddiscoverwhereweare.新知學習重點研討課堂小結當堂檢測學習目標

ThankstoGPS,wecanexactlyknoww_____wearenow.GPSislikeaman-made“star”.Itcanbeu____inanyplaceandanyweatherconditiontofindoutourp________.Inthepast,theearlyexplorershadtousestarsinthes____totellthemwheretheywere,however,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere________ourplanets.hereositionsedkyxploreFillintheblanksbasedon1a.新知學習重點研討課堂小結當堂檢測學習目標Findoutthesentenceswithpassivevoice(被動語態）情態動詞的被動語態構成：情態動詞+be+動詞的過去分詞1.Thestarscouldbeseen.2.Itcanbeusedtostudytheshapeoftheearth.新知學習重點研討課堂小結當堂檢測學習目標PassiveVoice(Ⅱ)Theradio

wasinvented

byGuglielmoMarconiin1895.When

was

thedigitalcameradeveloped?

It

wasdeveloped

inthe1970s.Where

was

it

developed?It

wasdeveloped

inJapan.Whatisarocketusedfor?Itisusedforsendingsatellitesorspaceshipsintospace.新知學習重點研討課堂小結當堂檢測學習目標IwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.It’ssaidthatheinventedmorethantwothousandthingsduringhislife.Inventingisinterestingandexcitingandeveryonecanbeaninventor.Functions1.ThisisKangkang’sinvention.Lookattheinformationandthepicture.Whatdoyouthinkofit?Discusswithyourpartners.Name:Plar(plan-car)Inventor:KangkangYear:2014Use:BothflyinganddrivingProject

新知學習重點研討課堂小結當堂檢測學習目標2.Designyourowninvention.Drawapictureofitandwritedowntheinformationaboutit.

Name:____________Inventor:___________Year:_____________Use:______________3.Showthepictureofyourinventionanddescribeittotheclass.4.Discussingroupstodecidewhichisthemostuseful/interesting/funnyinvention.新知學習重點研討課堂小結當堂檢測學習目標Languagepoints語態：表示主語和謂語動詞之間的關系。英語有兩種語態，即主動語態和被動語態。

主動語態：表示主語是動作的執行者。被動語態：表示主語是動作的承受者。如：Manystudents

study

English.(主動語態)English

isstudied

bymanystudents.(被動語態)語態新知學習重點研討課堂小結當堂檢測學習目標被動語態結構：被動語態由“助動詞be+及物動詞的過去分詞”構成。（be有人稱和數的變化）,注意不同時態的不同形式。eg:Theclassroomiscleanedbyuseveryday.Thetreeswereplantedbythestudentslastyear.Theoldsshouldbetakengoodcareof.新知學習重點研討課堂小結當堂檢測學習目標bymanystudents.1.Manystudentsstudy

English.Englishisstudied2.Theymade

shoesinthatfactory.Shoesweremadebytheminthatfactory.將主動語態變為被動語態方法:原賓語變主語，動詞變為be+動詞過去分詞，原主語由by連接。新知學習重點研討課堂小結當堂檢測學習目標

isspoken

by

HespeaksEnglish.Englishhim.一般現在時被動結構：be(am/is/are)+動詞的過去分詞一般過去時被動結構：助動詞(was/were)+動詞的過去分詞1.肯定句式：主語+was/were+v.-ed2.否定句式：主語+was/were+not+v.-ed3.一般疑問句式：Was/Were+主語+v.-ed4.特殊疑問句式：疑問詞W/H+was/were+主語+v.-ed新知學習重點研討課堂小結當堂檢測學習目標will是第一助動詞，否定句，疑問句都圍繞will進行變化。e.g.(1)Hewillbemetatairportbyhisfriend.(2)WillanEnglishcontestbeheld

nextSaturdayafternoon?(3)Youwillnotbeallowedtogooutifyoudon’tfinishyourhomework.

一般將來時被動結構：willbe+動詞過去分詞新知學習重點研討課堂小結當堂檢測學習目標例：Nowadays,theirmaterialshavebeenchangedsothatitfeelsmorecomfortable.

主：Hehasfinishedhishomework.

被：Hishomeworkhasbeenfinishedbyhim.現在完成時被動結構：have/has+been+動詞的過去分詞新知學習重點研討課堂小結當堂檢測學習目標byAmy.Ginacanbetakengoodcareof2.Youshoulddrink

morewater.Morewater

shouldbedrunkbyyou.含有情態動詞被動結構：can/may/must/should+be+動詞的過去分詞1.Amy

cantakegoodcareof

Gina

．新知學習重點研討課堂小結當堂檢測學習目標注意：1.主動語態中有些動詞，如make,let,see,watch,hear等后面常跟不帶to的不定式作賓語補足語，但變為被動語態時要加上to。如：Ioftenseetheoldmanruninthemorning.→Theoldmanisoftenseentoruninthemorning.我經常看見那個老人早晨跑步。新知學習重點研討課堂小結當堂檢測學習目標注意：2.不及物動詞happen,takeplace沒有被動語態。如：ThetrafficaccidenthappenedonMonday.這個交通事故發生在周一。3.某些表示主語的品質和狀態、自身特征的不及物動詞，如cut，sell，read，write，fill，cook，lock，wash，drive，keep等，常用主動形式表示被動意義。如：Thebooksellswell.這本書賣得很好。新知學習重點研討課堂小結當堂檢測學習目標新知學習重點研討課堂小結當堂檢測學習目標歸納總結一般過去時的被動語態

用英語敘述GPS的用途Unit4Topic1SectionD1.PeopleuseradiostolearnEnglishinthepast._____________________________________________2.Jackwillshowmeth