选修六the use of it

Grammar:Useof“It”,1.人称代词：指动物或不明性别的人或婴儿,Whosit?_me.,Its,2.指示代词:可指刚提到过的事物。,Thismeansthatafterawhileyourbodybecomesaccustomedtohavingnicotinein_.,it,一：it的指代作用,ItisFridaytoday.Itisabeautifuldayhere.Itismybirthdayintwoweekstime.Itisabout25kmfromLongxiantoBazi.ItliesinthesouthofShaoguancity.Itis40C!Yougotahighfever!3.Conclusion:it可以用来指代_,_,_,_,_,_等。,date,weather,time,distance,place,temperature,日期,天气,时间,距离,地点,温度,Itisnevertoooldtolearn.Itisnousecryingoverspiltmilk.,Proverbs(谚语)with“It”,活到老,学到老。,覆水难收,Itiseasytoopenashopbuthardtokeepitalwaysopen.,创业容易守业难。,二：it的形式作用,形式主语形式宾语,1.Itisnecessaryforyou_(把信给他).用for的adj.通常为描述事件的形容词：easy，difficult，hard，necessary，impossible，2.Itskind_youtohelpmewiththeproblem.用of的adj.通常为描述人的形容词：rude，cruel（残忍的），foolish，stupid，crazy.,（1）It+be+adj.+（for/ofsb.）todosth.,togivehimaletter,of,1.it作形式主语替代不定式（短语）,每天早上坚持锻炼对你好。Itisgoodforyoutokeepdoingmorningexerciseeveryday.你现在放弃这个工作是愚蠢的。,Itsfoolishofyoutoquityourjobnow.,Ex.Itisnouse_.(这么早去那里)在被窝里看书是不好的。Itisnogoodreadinginthebed.,Itis+nouse/nogood+doingsth.做某事是没用的，没有好处的,goingtheresoearly,2.it作形式主语替代V-ing形式,1.很明显水是罪魁祸首。Itisobviousthatthewaterwastoblame.2.吸烟危害健康，这是事实。Itisafactthatsmokingisharmfultohealth.3.据说日本发生了地震。ItissaidthatthereisanearthquakeinJapan.4.碰巧那天我出去了。IthappenedthatIwentoutthatday.,Itis+_+that从句,adj.,Itis+_+that从句,n.,Itis+_+that从句,V-ed,It+_+that从句,vi.,3.it作形式主语代替主语从句,obvious，possible，necessary,apity,ashame,nowonder,afact,said,reported,supposed,hoped,known,seem,appear,turnout,happen,Itissaidthat据说ItisreportedthatItissupposedthatItishopedthatItiswellknownthat,据报导,据推测,希望,众所周知,普遍认为,有人建议,Itissuggestedthat,Itisgenerallyconsideredthat,1.很明显他已经知道了那个坏消息。Itisobviousthathehasknownthebadnews.2.难怪她如此心烦意乱。Itsnowonderthatshewassoupset.3.有人建议他应该立刻戒烟。Itissuggestedthatheshouldquitsmokingatonce.,Wethinkitourdutytocleanourclassroomeveryday.Ithinkitnousearguingwithhim.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.,主语+V.(think,believe,make,find,consider,feel.)+it+n/adj.+todo/doing/that-clauseit作形式宾语,他发现早起是很困难的。Hefounditdifficulttogetupearly.她认为在课堂上讲话是不好的。Shethinksitnogoodtalkinginclass.他非常清楚地表示他对那门学科不感兴趣。Hemadeitclearthathewasnotinterestedinthatsubject.,_wasasunnyday.Peterdecidedtogoforawalktothepark,though_wastwomilesaway._wassocomfortabletowalkonthestreet.,it,It,It,Suddenly_begantorain.Hefound_hardtowalkthere.