Unit3TheworldofScienceUsinglanguage课件高一下学期英语外研版（2019）必修第三册.pptxVIP

;Lookatthesentencesfromthereadingpassageandanswerthequestions.;Comparethemwiththefollowingsentencesandanswerthequestions.;(Para.3)2.Iguessyou_______________(ask)aboutthetitleofyourbookbefore.

;(Para.8)4.Newinventionslike3Dprinters

______________(use)tomakereplacementheartsandboneparts.

(Para.10)5.I_____also_________(tell)thatyou’reaninventoryourself.;要义详解

一、现在完成时的被动语态概念和构成

1）概念

现在完成时的被动语态强调一个发生在过去的被动动作，它有两层意思：

（1）动作已经完成，强调对现在造成的影响或结果：

(2)主语与谓语动词之间为逻辑上的动宾关系。

1.Ourclassroom_____________(clean),soyouneedn’tcleanitnow.

2.Theseflowers_____________(water),youcangohome.

2)构成

;1.He_______________(select)totakepartinthesportsmeetingalready.

2.Theink____________________________(not)removedfromhisovercoat.

3._______thedateforthenextmeeting___________(decide)?

4.Howlong______thebattery_________________(notchange)?

5.Theboys_____________________________(已经被多次告知)nottoswiminthatlake,butitdoesn’tmakeanydifference.

6.Whenandwheretogofortheon-salaryholiday_____________________(没有确定)yet.

7.Thatbook___________________(已经被翻译)intoatlast20foreignlanguagessofar.

8.下次会议的日期已确定了吗？______________________________________

;;1.Themachineisworkingagain!

Yes,itbrokedownyesterday,butit______________(fix).

2.Morethan50,000yuan_____________(raise)forthepoorfamilysincethegroupwasfounded.

3.Overthepastthreeyears,thepaintings___________________(take)tomorethan20museumsintheworld.

4.Travellingtoconferences,lectures,workshops,andthelikefrequentlybyplane___________________(view)asimportantforscientiststogettogetherandexchangeinformation.

;三、注意的问题

1）非延续性动词在现在完成时的被动语态中的运用。

非延续性动词，如borrow,finish,begin,start,buy,marry,open,join等构成的现在完成时的被动语态不与for或since连用。但这类动词的否定式可表示动作的持续过程，具有连续性，因而可与since或for引导的时间状语连用。

e.g.Nobookshav