Unit3TheInternetDiscoveringUsefulStructures課件-高中英語人教版

Unit3TheInternetPeriod3DiscoveringUsefulStructuresNewwordsbatteryWi-FiNewwordsbuttonfileThey’vebuiltakindofnewPCwithmorefunctions.NewwordsNewwordsHaveyouconfirmedtheWi-Fipassword?confirmsbinsthNewwordsHaveyoupressedthebuttonyettocopythefile?pressuren.

表示

發(fā)生的或

的動作對

造成的

?，F(xiàn)在完成時概念：過去已完成現(xiàn)在影響或結果e.g.1.

Goodbyetoyoumytrustedfriend.別了朋友，我的摯友。

2.

Ihavejustfinishedthehomework.

作業(yè)現(xiàn)在已經(jīng)做完了。常用的時間狀語有：◆常與不確定的時間狀語連用，如:

uptonow,

bynow,lately,already,since,eversince,just,yet,before,recently,sofar,inthepast/lastfewyears等,表示“到目前為止”所發(fā)生的動作.

現(xiàn)在完成時謂語動詞的構成

have/has+done1.have&has當主語是

___，用has;當主語是________，用have。第三人稱單數(shù)其他人稱2.done在現(xiàn)在完成時中叫___________除不規(guī)則變化外，一般情況加ed

過去分詞現(xiàn)在完成時的基本句型現(xiàn)在完成時(ActiveVoice)肯定式

have/hasdone否定式

have/hasnotdone一般疑問句

have/has+主+done？

（have/has提前）特殊疑問句疑問詞+have/has+主+done？

(疑問詞+一般疑問句)1.Readthepairsofsentences.Underlineandcomparethedifferentverbforms.現(xiàn)在完成時被動語態(tài)的構成:Jan’slifehasbeengreatlyimprovedbytheInternet.TheInternethasgreatlyimprovedJan’slife.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.VerbformActivePassivehave/has+been+done主語和動作之間是主動關系主語和動作之間是被動關系have/has+done2.Changethesentencesintothepresentperfectpassivevoice.1.They’vebuiltakindofnewPCwithmorefunctions.AkindofnewPChasbeenbuiltwithmorefunctions.…已經(jīng)被建造現(xiàn)在完成時主動：

被動：1)動作或狀態(tài)從過去開始,一直持續(xù)到現(xiàn)在,常與下列時間狀語連用:sofar,uptonow,uptillnow,bynow,recently,lately,inrecentyears;(ever)since+一般過去時,in/during/overthepast/last...years/months/days/weeks,overtheyears1.Hisfirstnovelhasreceivedgoodreviewssinceitcameoutlastmonth.2)動作或狀態(tài)發(fā)生在過去,但對現(xiàn)在有影響或結果2.Igotcaughtintherainandmysuithasbeendamaged.

have/hasdone

have/hasbeendone

現(xiàn)在完成時主動：

被動：3)固定句型:It/This/Thatisthefirst(second,third…)timethat…+現(xiàn)在完成時，表示“第幾次做某事”3.Thisisthefirsttimewehaveseenafilminthecinematogetherasafamily.

have/hasdone

have/hasbeendone

練習1.Everymeans______(try)toprotectpandasoverthepast10years.2.Manykindsofapps______(create)toattractyoungpeopletoplaygamessofar.3.Manywords_____(add)tothelanguagesinceitwaspublished.

hasbeentriedhavebeencreatedhavebeenadded練習4.Manyscientificcentres______(establish)throughoutChinainrecentyears.5.Uptonow,researchers_______(find)atleastfivespeciesontheisland.

havebeenestablishedhavefound練習1.BythetimeJackreturnedfromhomefromEngland,hisson____________(graduate)fromcollege.2.Itwasthefirsttimethathe_______(leave)

hisnativeland.

hadgraduatedhadleft(bythetime截止，在……之前)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.1.用現(xiàn)在完成時的被動語態(tài)改寫、翻譯句子。①Jack’sbosshasalwayspraisedhimforhisdevotiontowork.Jack___________________________byhisbossforhisdevotiontowork.②Theyhavefoundagoodplacetobuildatempleinthevillage.Agoodplacetobuildatempleinthevillage___________________.③Wehaven’tyetdecidedhowtosolvethatdifficulttechnologicalproblem.Howtosolvethatdifficulttechnologicalproblem___________________yet.④當我的家庭作業(yè)完成時我就回家。

Iwillgohomewhenmyhomework_________________.⑤紙幣已被使用了1000多年了。

Papermoney_________________foroveronethousandyears．hasalwaysbeenpraisedhasn’tbeendecidedhasbeenfound鞏固強化hasbeenfinishedhasbeenused6．中國的各項事業(yè)已取得了新的進展。Newprogress_________________invariousareasinChina.7．我的家庭作業(yè)已經(jīng)做完了。Myhomework___________________.8．近幾年他各種各樣的書被出版了。Avarietyofhisbooks_____________________inrecentyears.9．從1949年起，政府就已經(jīng)非常重視兒童的健康和保健。Since1949,greatattention__________________thehealthandcareofchildrenbythegovernment.hasbeenmadehasbeenfinishedhavebeenpublished

hasbeenpaidto2.將下面句子變?yōu)楸粍诱Z態(tài)①Ihaveaskedhertohelpyou．→________________________________________________________②Wehaveplantedmanytreesonthehillinthelast5years．→________________________________________________________③Hehassentmeane-mail．→________________________________________________________→___________________________________________________