公开课 it的用法.ppt

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1、Book6Unit3AhealthylifeGrammar:Theuseof“it”中天高中李倩倩Lead-inititititDiscover“it”inthetextPara.1,2Itisabeautifuldayhere.Itseemsamazingthatatmyage…It’smybirthdayintwoweek’stime.Nowyouarefindingitdifficulttogiveitup.Iknowhoweasyitis…andhowtoughitis…Para.3Para.4,5Lead-inThismeans…havingnicotinei

2、nit.Ifyoudo…,youbegintodoitautomatically.Soitwasverydifficulttoquit.Itcoulddoterribledamagetoyourheart.Itwasmoredifficultforsmokingcouplesto…Iknewitwastimetoquitsmoking.Itmighthelpyoutostopandstrengthen…人称代词人称代词人称代词人称代词人称代词形式主语人称代词形式宾语形式主语形式主语形式主语习惯用法Theuseof“it”1指代前面的名词或提到过的事2指代性别不明的chi

3、ld或baby3指代未出场的身份不明确的人4指代时间、距离、自然现象、环境、情况等5指代指示代词this/that人称代词Whataretheuseofit?Try_______1.—What’sthis?—It’sakindoffood._______2.—Whoisknockingatthedoor?—Itmightbethemilkman._______3.Thissuitcaselooksheavybutactuallyitisverylight._______4.Itistwomilestotheislandfromhere._______5.Mysister

4、-in-lawgavebirthtoababy;itweighs4kg.53124Theuseof“it”形式主语做形式主语it可以用作先行词作为句子的主语,而把句子的真正主语移到后面去,可以移到后面的主语是：不定式2）动名词3）that从句常用句型Ittakessb.sometimetodosth.Itbe+adj.+todosth/that…Itbe+n.+todosth/that…Itbe+adj./n.+doingsthItbe+过去分词+that…090001876543215000498765432103987654321098765432102198765

5、4321098765432100HoursMinutesSecondsMemorizeasquicklyaspossibleIttook/takes/willtakesb.Sometimetodosth…敢不敢再难一点！(他花了3个小时才做完作业)Ittookhim3hourstofinishhishomework.Itistoughforthemtoquitdrinking.Itis+adj+todosth/that…好喝！(对他们来说戒酒很难)哇！我和小伙伴们都惊呆了！Itisawondertoseesuchabighenploughing.(看到如此大的一只母鸡耕

6、地是一个奇迹)Itis+n+todosth/that....母鸡：hen耕地：ploughItisnouse/nogood/awasteoftimedoingsth.It’snogoodbeingaddictedtoplayingcomputergames.再玩一会就去睡觉……(沉迷于游戏没有一点儿好处)Itbe+过去分词+that…据……ItisreportedthatthreeairportswillbebuiltinJinhua.看！灰机！(据报道，金华将要建造三个机场)Theuseof“it”形式宾语当复合宾语中的宾语是不定式、动名词、宾语从句时,往往用it作形

7、式宾语，把宾语放在它的补足语后面，常用于此结构的动词有：make/think/feel/find/consider/believe/discover等常见形式thinkit+adj./n+todosth/that从句IthinkitveryinterestingtolearnEnglish.2.thinkitnouse/useless/nogooddoingIthinkitnousearguingwithhim.注意：某些动词不能直接跟宾语从句，须先接it作形式宾语，常见的有：like,appreciate,dislike,hate等3.