Unit3TheInternetDiscoveringusefulstructures课件高中英语人教版2.pptx

Unit3TheInternet

Grammar

;

高中英语

Learningobjectives

Attheendoftheclass,youwillbeableto

1.knowtheform,themeaningandthefunctionofthepresentperfect

passivevoice

2.talkaboutthethingsthathavebeendone;

Manystudentslikethismovie.;

Thismovieislikedbymanystudents.;

种类;

TheInternethasgreatly

improvedJan’slife.;

高中英语

Howdoweformthepresentperfectpassivevoice?

Fillintheblankbelow.;;;

高中英语

Understandtheunderlinedpartsandfillintheformbelow

1.Howmanybuildingshavebeenbuiltinyourschool?

2.Havethelostkeysbeenfound?

3.Thedatehasnotbeendecidedyet.;

高中英语

Theusageofthepresentperfectpassivevoice

1.表过去开始的动作一直持续到现在，常连用的时间状语有：for+时间

段，since+时间状语(从句)，sofar,uptonow等。

如：

1)ThisclasshasbeentaughtbyMr.Lifortwoyears.

2)HisChinesehasbeenimprovedalotsincehecametoChina.;

2.表示某动作已经完成，并对现在造成影响，常与already,yet,ever,

never等连用。如：

1)Thebikehasnotbeenrepairedyet.

2)IhavealreadybeenintroducedtoMr.Li.;

高中英语

ChangethesentencesintothepresentperfectpassivevoiceExample:

They’vebuiltakindofnewPC.

AkindofnewPChasbeenbuilt.

1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.

2.Someonehaslostanidentitycard.

3.Haveyoupressedthebuttonyettocopythefile?;

高中英语

1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.

Thesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.

2.Someonehaslostanidentitycard.

Anidentitycardhasbeenlost.

3.Haveyoupressedthebuttonyettocopythefile?

Hasthebuttonbeenpressedyettocopythefile?;

高中英语

ThinkandAnswer

1、Whatarethesimilaritiesanddifferencesbetweenthepresentperfect

tenseandthepresentperfectpassivevoice?

两者都表示动作已经完成，并对现在造成影响或动作从过去开始持续到现在。

现在完成时，意为“已经做了”，主语是谓语动作的发出者

现在完成时的被动语态，意为“已经被做了”主语是谓语动作的承受者

2、Whencanweusethepresentperfectpassivevoice？

当动作的执行??没必要说明，不重要或者不清楚是谁时，多用被动语态。;

高中英语

Pract