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Unit 3 The Internet Discovering Useful Structures 导学案高中英语人教版必修第二册.docx

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(2025年)

B2Unit3DiscoveringUsefulStructures导学案

【LearningObjectives】

Inthisclass,studentswill:

1.identifyandsummarizetheformandthefunctionsofthepresentperfectpassivevoice.

2.comparethepresentperfectpassivevoicewiththeactiveandchangetheactiveformintothepassiveform.

【预习案】将下列句子变成被动语态。

1.ManypeoplearoundtheglobespeakChinesenow.

2.Someonestolemybikeyesterday.

3.Wewillfinishthereportbytomorrow.

4.HuntersarehuntingAfricanelephantseveryyear.

5.TheInternethasgreatlyimprovedJanslife.

【探究案】

1.现在完成时的结构

主动式

被动式

肯定式

否定式

一般疑问句

特殊疑问句

2.主动语态变为被动语态的原则

三变:原句主语;宾语;谓语

三不变:原句意思、时态和主谓宾以外的部分

3.将下列句子变为被动语态。

Theylookveryhappybecausetheyhavesolvedthedifficultproblems.

____________________________________________________________________________

Scientistshavemadeanewrobotwhichcanwalkandtalklikehumans.

____________________________________________________________________________

ThegovernmenthasspentalotofmoneyontheHopeProject.

____________________________________________________________________________

HastheschoolsentthemabroadtostudyEnglish?

____________________________________________________________________________

Whohasthehostinvited?

____________________________________________________________________________

现在完成时的被动语态

定义:

1.表示动作已经被完成,或截止到现在,与since+过去时间,sofar/uptonow/bynow到目前为止,recently/lately最近,forthreedays,overtheyears,inthepasttenyears在过去的10年里,overthelasttwomonths在过去的两个月里,等时间状语连用;

eg.Thechildhasbeentakencareofbyhisgrandmaovertheyears.

eg.Thesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.

eg.FirstasaPCandthenasalaptop,acomputerhasbeenusedinofficesandhomessincethe

1970s.

Tips注意事项:

①由finish,buy,start,begin,post,return,borrow,marry,open等词构成的现在完成时的被

动语态,不能与表示段时间的状语,如forfourdays,howlong等连用,而要改换动词或时

态。

判断正误:

*Howlonghasthisbookbeenbought?()

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