Unit+3+Discovering+Useful+Structures+課件【備課精研+知識精講】 高中英語人教版（2019）必修第二冊

Unit3TheInternetPeriod3DiscoveringUsefulStructuresNewwordsbatteryWi-FiNewwordsbuttonfileThey’vebuiltakindofnewPCwithmorefunctions.NewwordsNewwordsHaveyouconfirmedtheWi-Fipassword?confirmsbinsthNewwordsHaveyoupressedthebuttonyettocopythefile?pressuren.1. Beforeuse,the_________mustbecharged.2. Wehavedevelopedanewtypeofsoftwarewithmany_________(function).3. Icalledtheairport__________(confirm)myflightreservationaweekbeforeIleftforBeijing.4. Inrecentyears，stresshasbeenregardedasacauseofawholerangeofmedicalproblems，fromhighblood__________(press)tomentalillness.［2016·上海卷］5. Iselecteda_________(文件)and_________(按)thedeletekey.batteryfunctionstoconfirmpressurefilepressedLet’slearnReadthepairsofsentences.Underlineandcomparethedifferentverbforms.Jan'slifehasbeengreatlyimprovedbytheInternet. MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.TheInternethasgreatlyimprovedJan’slife.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.Howdoweformthepresentperfectpassivevoice?Filltheblank.Let’slearnVerbformActivePassivehave/has+v-ed____________________have/hasbeen+v-edChangethesentencesintothepresentperfectpassivevoice.EXAMPLEThey’vebuiltakindofnewPCwithmorefunctions.↓AkindofnewPChasbeenbuiltwithmorefunctions.1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.2.Someonehaslostanidentitycard.3.HaveyouconfirmedtheWi-Fipassword?Thesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.Anidentitycardhasbeenlost.HastheWi-Fipasswordbeenconfirmed?4.Haveyoupressedthebuttonyettocopythefile?5.Hasanyonemadeacommentabouttheonlinedatabase?Hasthebuttonbeenpressedyettocopythefile?Hasa/anycommentbeenmadeabouttheonlinedatabase?Findoutthedifferencesinmeaningandfunctionbetweentheactiveandpassiveforms.Theobjectinanactivesentencebecomesthesubjectinapassivesentence.Bothsentencetypesconveyasimilarmeaning,buttheyareslightlydifferent.Activesentencesareusedoften,astheyaremoredirect.Passivesentencesareoftenusedwhenthedoerofanactionisunknown,notimportant,orpreferrednotnamed.thepresentperfectpassivevoiceWeuseitwhensomethinghasbeendonebysomeoneatsometimeuptonow.Wearenotinterestedintheactor/doer(行動者).Subjectanditsverbshouldbeinaagreement.“及物動詞+副詞”“及物動詞+介詞”以及“及物動詞+副詞+介詞”構成的短語動詞可用于被動結構。許多“不及物動詞+介詞”以及“不及物動詞+副詞+介詞”構成的短語動詞相當于及物動詞，也可以有賓語，也可用于被動結構。Completethenoticewiththecorrectformsoftheverbsinbrackets.DearParents,Wehopeyouwillwelcomethisnews.Almost100computers______________(give)tousbyalocalcomputercompanysincetheendoflastyear.Adecision_______________(make)tobeginacomputerteachingexperimentatourschool.We________________(help)inourteachingbyalotofinformationfromtheInternet.Al