高中英语 Unit3 第3课时 Grammar学案 新人教版选修6.doc

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1、Unit3AHealthyLifePeriod3Grammar–TheUseof“It”(1)Learningaims:Tomasterthestructureanduseof“it”Importantpointanddifficultpoint:Tolearntouse“it”correctlyandproperly.使用说明及学法指导：1.自我学习同步测练P的内容，完成预习案。2.完成时间20分钟。预习案PreviewingCaseTask1课文原句填空并分析所填单词在句中所充当的成分。1．_________is

2、abeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden.()2．________seemsamazingthatatmyageIamstillfitenoughtocycle20kilometersinanafternoon.()3．________ismybirthdayintwoweekstimeandI’llbe82yearsold!()4．Yourmothertellsmethatyoustartedsmokingsometimeago

3、andnowyouarefinding_______difficulttogive______up.()5．Believeme，Iknowhoweasy__________istobeginsmokingandhowtough_________istostop.()6．Thismeansthatafterawhileyourbodybecomesaccustomedtohavingnicotinein_________.()7．Asyouknow，ifyoudothesamethingoverandoveragain

4、，youbegintodo_______automatically.()8．Ididn’tknow，forexample，that__________coulddoterribledamagetoyourheartandlungsorthat__________wasmoredifficultforsmokingcouplestobecomepregnant.()Task2分析下列句中it的用法。1.Tom'smotherkepttellinghimthatheshouldworkharderbutitdidn'th

5、elp.()2.—Whoisknockingatthedoor?—It'sme.()3.Itissome3000kilometersfromBeijingtoGuangzhou.()4.It'sgettingcolderandcoldereveryday.()5.Theywatchedthetrainuntilitdisappearedinthedistance.()小结：代词it的用法用法例句代替前文提过的东西或事情，避免重复Tomjoinedthearmylastmonth.Doyouknowaboutit?Th

6、isisanewdictionary.Iboughtityesterday.指代前句或后句所述的抽象事物或抽象环境和情景Ihateitwhenpeopletalkwithafullmouth.代替指示代词，起着this或that的作用Isthisyourcar?—No,itisn’t.What’sthat?—It’savideo.指明某人或某物的身份，还可指不明性别的婴儿Who’sthere?—ItisJohn.TheGreenshaveanewbaby.It’slovely.指时间，距离，自然现象（天气、气候、明暗

7、），量度，价值等Itisalovelyday,isn’t it?指天气Itwasnearlymidnightwhenshecameback.指时间Itis/hasbeen10yearssincehelivedhere.指时间Itwasnotlongbeforetheyarrived.指时间ItisAprilFirsttoday.指日期HowfarisittotheGreatWall?指距离Itisthreedollars.指价值Todayitis30degreescentigrade.指温度我的疑惑：探究案Explo

8、ringCaseit用作形式主语探究一it替代作主语的不定式1．It+be+adj.+（forsb.）+todosth.不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的中性形容词。常见的形容词有easy,difficult,hard,necessary,possible,likely,righ