英语选修6unit3语法.ppt

Grammar,The use of“it”,it 真实身份大揭底,.用作人称代词,.用作非人称代词,.It 作形式主语,.It 作形式宾语,.It 用在特定句型中,.It 用在固定习语中,“It”用作“人称代词”,1.It 指代上文中提到的物、事。（简化语言，避免重复）eg.My pen is missing.I cant find it.Xian isabeautifulcity,isntit?Is this your dog？No,it isnt.2.指代性别不明的人（常指baby）/说话人不清 楚性别的人（常在打电话、敲门等时）:eg.The baby cried because it was hungry.There is a knock at the door.It must be the milkman.3.代替上文中的指示代词this/that-Who is that over there?-Its Helen.,.用作人称代词,“It”用作“非人称代词”,“it”表示天气、时间、日期、距离、价值、度量、温度、环境，季节，情况等（称为非人称的it）：,It is about 5 kilograms.,How is it going?,.用作非人称代词,It is a bit windy.(指天气)It was nearly midnight when she came back.Its May 1,2007.It is 150 yuan.It is summer now.,It was very quiet inthecaf.It is half an hourswalkto the city centre,（指时间）,（指日期）,（指价格）,(指季节),（指度量）,(指环境),(指距离),(指情形),“It”用作“形式主语”（8）,it：形式主语 to do：真正主语（3）it：形式主语 doing：真正主语（1）it：形式主语 that从句：真正主语（4）,adj.：legal，illegal，polite，impolite，possible,impossible,clear，obvious，evident,certain，suitable，fit，useful，useless，etc.),一、,it+be+adj.(+for sb.）+to do sth.,“（对 sb.来说，）做某事是的。”,It is important for us to learn English well.,it+be+adj.+of sb.+to do sth.,Its kind of you to help me with the problem.Its generous(adj.慷慨的)of you to donate such a large of money to charity.,（此处adj.通常为描述“人”的形容词：brave,kind，unkind，nice，rude，considerate，careful，careless，silly，foolish，stupid，clever，wise，crazy.）,it+be+n.+to do sth.,It is a good idea to quit smoking before one comes pregnant.It is a pity/shame not to see that scholar in the flesh.,“做某事（真）是个”,常用n.有：good idea/a pity/a shame等,二、it+be+n./adj.+doing sth.,eg.Its no use crying over spilt milk.,Its a waste of time playing computer games.Its worth visting.,Its useless thinking too much.,Its no use/useless doing sth 做某事是无用的Its no good/a waste of time/fun/worth doing sth,It is very clear that hes round and tall like a tree.,三、1.It+be+adj.+that从句.,It is certain that everything will get on well due to our hard work.,It is strange that he shouldnt feel ashamed of his behavior.,（当adj.为strange/surprising/natural/important/necessary等时，that 从句中即(should)+do）,2.it+be+n.+that从句.,It is no wonder that you are breathless.,It is a pity/shame that he should get into the habit of abusing alcohol.,（其中，当n.为a pity(a shame/an honor/a Surprise.等表示出乎意料时，常译为“竟然”，则 that 从句中的v.用虚拟语气，即should+do）。没有这种意义时，则不用虚拟语气。例如：,It is reported that many people died in the earthquake.,3.it+be+V.ed+that从句.,“据/有人（人们）”,It is suggested that the students(should)build up their strength.,(其中，当v.为insist;command,order;suggest,recommend;require,request,demand等时，that 从句中的v.用虚拟语气，即(should)+do,4.it+Vi+that从句.,(常用v.有happen,seem,appear,looks,等.),It happened that he met his teacher in the street.,eg.It seems that he will be back in a few days.,“It”用作“形式宾语”（2）,1.“某些谓v.+it 宾语+宾补（n.adj.）+真宾（to do doingthat从句）”,.It 作“形式宾语”,常用的v.有:think,believe,make,find,consider,feel,etc.,I think it no use arguing with him.I found it very interesting to study English.He made it clear that smoking is banned in the school.He considers it his duty to help those at risk.,2.某些谓v.+it 形宾+真宾（that/when/if 从句）,（常用v.用：like,love,appreciate;dislike,hate depend on,count on;see to,make sure;takefor granted等。）,eg.I dont like it when one speaks with his mouthful.,eg.I would appreciate it if I were admitted to the school football team.,eg.I hate it that you speak when your mouth full.,eg.Dont take it for granted that famous brands mean high quality.,eg.You can depend on it that he will come here on time.,Exercises Time,I.单项选择1.He didnt make _ clear when and where the meeting would be held.(天津)A.this B.that C.it D.these 2._ is our belief that improvements in health care will lead to a stronger,more prosperous economy.(浙江)A.As B.ThatC.This D.It,高考实例,3.The doctor advised Vera strongly that she should take a holiday,but _ didnt help.(全国卷III)A.it B.she C.which D.he4.Id appreciate _ if you would like to teach me how to use the computer.(山东)A.thatB.it C.this D.you,1.Revise and master the use of it.2.Pre-view the Reading:HIV/AIDS:Are you at risk?,Homework,See you next time!,