It的专项总结(印1300)问题导读评价单Chiefeditor:ZhangYanhuaSenioreditor:WangMin一、人称代词1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复:①Theywatchedthetrainuntilitdisappearedinthedistance.2.，也可以指动物或婴儿(未知性别的婴儿或孩子):②Isthisyourdog？No,itisn’t.③Theygotababyanditwasaten-pounder3.，也可指抽象事物或指抽象环境和情景:③Ihateitwhenpeopletalkwithafullmouth.．二、.非人称代词1.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：⑴.指天气：Itisalovelyday,isn’tit?⑵.指时间:Itwasnearlymidnightwhenshecameback.⑶.指日期:ItisAprilFirsttoday.⑷.指距离:Itissome3000kilometersfromBeijingtoGuangzhou.⑸.指价值:Itisthreedollars.⑹.指温度:Todayitis30degreescentigrade.三、其他用法1.在句子的主语不太明确时充当主语，表示谁在做某事：①Whoisitthere?It'sI(me/you/he.....).②IthoughtitwasMary,butitwasnotshe.③Herfacelightedwhenshesawwhoitwas.2.泛泛的指某件事：(有时泛指一般情况)①Itdoesn’tmatter.②Itisashame,isn’tit?③Howisitgoing?(情况怎样)④Itsaysinthenewspaperthat......3.it用在一些词组中，it没有特别的意思Thelasttrain'sgone.Comeon,we'llfootit.(来，咱们步行吧。)四、作形式主语，替代主语从句，动词不定式，或动名词短语：1.作形式主语替代主语从句⑴Itisclear(obvious，true，possible，certain....)that从句常译为＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂Itisveryclearthathe’sroundandtalllikeatree.=Thathe’sroundandtalllikeatreeisveryclear.⑵Itisimportant(necessary，right，strange，natural...)that从句常译为┅是重要的(必要的,对的,奇怪的,自然的┅).that后的从句中要用虚拟语气（should+动词原形），should可以省去，建议记住该句型中的形容词。①Itisimportantthatwe(should)learnEnglishwell.②Itisnecessarythathe(should)rememberthesewords.⑶Itissaid(reported/learned/believed/thought/known/told/hoped.....)that从句常译为＂据说（据报道，据悉．．．）＂。①ItissaidthathehascometoBeijing.②Itisreportedthatanotherearthsatellitehasbeenputintoorbit.⑷Itissuggested(advised/ordered/demanded/insisted/commanded...)that从句.that后的从句要用虚拟语气（should+动词原形），should可以省；常译为＂据建议；有命令．．．）①Itissuggestedthatthemeeting(should)beputoff.②Itwasorderedthatwe(should)arrivethereintwohours.⑸Itistime(abouttime，hightime)that从句(虚拟语气:动词用过去时did)Itistimethatchildrenwenttobed.Itistimeyouboughtanewcar.Itis(high)timeyoumadeupyourmind.⑹Itisthefirst(second...)timethat从句(从句用现在完成时havedone)Itwasthefirst(second...)timethat从句(从句用过去完成时haddone)常译为＂是第一（二）．．．次．．．＂。ItisthefirsttimeIhavebee