Unit+3+The+World+of+Science+Using+Language+课件【知识精讲精研+能力培优提升】 高中英语外研版（2019）必修第三册

TheworldofscienceUsinglanguageUnit3Activity1DescribethepaictureswithPresentperfecttense.Someonehasbrokenthewindow.Hehasfinishedhishomework.表示说话时已经完成的动作，而且这个动作的结果对现在还有影响Activity1DescribethepaictureswithPresentperfecttense.Hehastaughtinourschoolfor30years.表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去使用现在完成时的注意事项时间状语during/

over/inthelast/

past+时间段,...等时间状语since+时间点,already,recently,lately,sofar,uptonow,untilnowfor＋时间段,eversincethesedays(years,months,weeks)1.Duringthelastthreedecades,thenumberofpeopleparticipatinginphysicalfitnessprograms____________(increase)sharply.2.Simon_____________(attend)hisfatherforsuchalongtimethatheunderstandsalmosteverygestureofhisfather’s.3.Icomplainedtothemanagerofthehotelaboutthepoorservicelastweek,butuptonow,I________________(receive)hisreply.4.Inrecentmonths,theChinaGrandCanalMuseuminYangzhou,whichexhibitsthehistoryandcultureoftheGrandCanal,________________(attract)agreatnumberofvisitors.

haveincreasedhasattendedhaven’treceivedhasattractedQ:怎么知道上面用现在完成时的？A:根据时间状语Practice1.Afterseveralyearsofobservation,theresearchgroup_______________(arrive)attheconclusionthatlanguageacquisitionisfasterwhenstudentsareexposedtothesituationwhereitisspoken.

2.Greatchanges_____________(take)placeinmyhometownandyoucanseethatalotoffactorieshavebeensetup.hasarrivedhavetakenQ:上面的句子没有时间状语，为什么要用现在完成时？A:根据语境；表示“到目前为止，已经……”1.Itisthefirsttimethatthelocaleducationauthority_____________(make)suchstrictrequirementsongoing-to-schooltimeforprimaryandmiddleschoolstudents.2.It______________(be)tenyearssincewemetlasttime.3.We______________(be)toBeijingfourtimes,sothistimewewon’tchooseBeijingasadestination.hasmadeis/hasbeenhavebeenQ:上面的句子没有时间状语，为什么要用现在完成时？A:固定句型Itis+序数词+timethatsbhave/hasdonesth.Itis/hasbeen...时间sincesbdidsth.sb.have/hasdonesth+次数Activity2DescribethepaictureswithPresentperfecttense.YouhaveslayedanenemyYouhavebeenslayedbyanenemy现在完成时的被动语态现在完成时现在完成时谓语结构

主动被动have/hasdonehave/hasbeendone(1)Thedoorhasbeenlocked.(2)Theseflowershavebeenwatered,andyoucangohome.(3)Ourclassroomhasbeencleaned,soyouneedn'tcleanitnow.主语与谓语动词是被动关系Practice1.Morethan50,000yuan

(raise)forthepoorfamilysincethegroupwasfounded.2.Thefamousmusician,aswellashisstudents,________(invite)toperformattheopeningceremonylastnight.3.Inthelastfiveyears,Cao___________(walk)through34countriesinsixcontinents.hasbeenraisedwasinvitedhaswalkedPractice3.Thisisthefirsttimethatawoman_____________(appoint)tothepost.5.There____________(be)adramaticriseinthenumberofextremeweathereventsoverthepast20years,causedlargelybyrisingglobaltemperatures,accordingtoanewreportfromtheUnitedNations.hasbeenhasbeenappointedActivity3Readandrewrite.Manythingsinourlives

havealreadybeenaffected,3D-printedhamburgershavebeenservedtocustomersinsomerestaurantsinLondon.Butperhapsthemostsignificantsuccessthathasbeenachievedtodateisinmedicine.Humanbodyparts,includingabeatingheart,havebeenmadewith3Dprintingtechnology.

Anew3D-printedshellhasbeengiventoaturtleinjuredinaforestfire!Activity4ImagineyouareDrMoore.Lookatthepicturesandtellthepoliceaboutthedamageandlosstoyourlab.Usethepresentperfectpassivewherea