人教英语必修四Unit2Section2LearningaboutLanguage课件.ppt

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1、WorkingthelandUnit2LearningaboutLanguageSectionⅡ课前新知预习1课堂要点探究2课堂达标验收3课后强化作业4课前新知预习观察思考用所给词的适当形式填空，并说明其在句中充当的成分。①Sincethen,________(find)waystogrowmorericehasbeenhislifegoal.()②Asayoungman,hesawthegreatneedfor__________(increase)thericeoutput.()③YuanLongpingsearchedforawaytoincreasericeharves

2、tswithout__________(expand)theareaofthefields.()④However,hedoesn‘tcareabout_____(be)famous.()finding主语increasing介词的宾语expanding介词的宾语being介词的宾语⑤Heenjoys________(listen)toviolinmusic,________(play)mahjong，swimmingandreading.()⑥________(spend)moneyonhimselforleadingacomfortablelifealsomeansveryl

3、ittletohim.()⑦Just________(dream)forthings,however,costsnothing.()⑧Heawokefromhisdreamwiththehopeof___________(produce)akindofricethatcouldfeedmorepeople.()listeningplaying宾语Spending主语dreaming主语producing介词的宾语课堂要点探究一、基础点拨(一)动词ing形式在句子中可以作主语、定语、表语、宾语补足语和状语主动语态被动语态一般式doingbeingdone完成式havingdone

4、havingbeendone语法精点1.动词ing形式在时态上分为一般式和完成式。一般式表示动词ing的动作和谓语动词的动作同时进行如下面例①；完成式表示在谓语动词所表示的动作之前发生的动作如下面例②。①Sheenjoysplayingthepiano.她喜欢弹钢琴。②Hewaspraisedforhaving_doneagooddeed.他因做了好事而受到表扬。2．动词ing形式在语态上分为主动式和被动式。主动式表示它的逻辑主语是ing分词的动作执行者，如下面例①；被动式表示它的逻辑主语是ing分词的动作承受者，如下面例②。①Heinsistedonsendinghertoh

5、ospital.他坚持要把她送到医院去。②Heinsistedonbeing_senttoworkinthecountryside.他坚持要被派到乡下去工作。(二)动词ing的形式作主语1．动词ing形式作主语时，多表示经常性、习惯性的动作，谓语动词多用单数形式。*Laughingoftenwillbenefityoualot.笑口常开好处多多。*Having_lived_abroadforalongtimemakeshimhomesick.在国外生活了很久令他想家。名师点拨意义不同的两个动词ing形式并列作主语时，谓语动词需用复数形式。Writing_and_readinga

6、rehertwohobbies.写文章及读书是她的两个爱好。2．形式主语it代替动词ing形式作主语的常见结构：(1)Itis＋adj.＋doingsth.Itis/feelsfunnydoingsth.做某事(感觉)很滑稽Itisuselessdoingsth.做某事无用It'sworthwhiledoingsth.做某事是值得的(2)Itisawasteof＋n.＋doingsth.It'sawasteoftimedoingsth.做某事是浪费时间(3)Itisno＋n.＋doingsth.It'snogood/nouse/nofundoingsth.做某事没好处/没用/没

7、意思(4)Therebe＋no＋doing(joking/knowing...)*It_is_useless_makingsuchefforts.做这样的努力是没用的。*It_is_a_waste_of_time_doingsuchwork.做这样的工作是浪费时间。*It_is_no_good_sayingsuchwords.说那样的话没有好处。*There_is_no_knowinghowtheprojectwillbecarriedout.不知道这个工程将如何实施。(三)动词ing形式作