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时间:2019-11-09
《《it做形式主语》PPT课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、.it用作形式主语.1代替主语从句1)Itis+adj.+that从句①Itisclear(obvious,true,possiblecertain....)that.....“清楚(显然,真的,肯定...)”Itisveryclearthathe’sroundandtalllikeatree.②.Itisimportant(necessary,right,strange,natural...)that...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。Itisimportantthatwe(should)learnEngli
2、shwell.2).Itis+v-ed+that从句①Itissaid(reported,learned....)that...据说(据报道,据悉...)“。 ItissaidthathehascometoBeijing.②.Itissuggested(ordered/demanded/insisted/commanded...)that...主句中的过去分词是表示请求,建议,命令等词时,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...)Itissuggestedthatthemeeting(should)beputoff.=
3、HeissaidtohavecometoBeijing.3).Itisapity(ashame...)that...that后的从句一般用虚拟语气(should+动词原形),should可省去.表示出乎意料,常译为“竟然”。没有这种意义时,则不用虚拟语气。Itisapitythatsuchathing(should)happeninyourclass.Itisapitythatheisill.4).①Itistime(abouttime,hightime)that...该句型中that后的从句应该用虚拟语气,值得注意的是常用过去时态表示虚拟.常译为“是(正是)...的时侯...”
4、 Itistimethatchildrenwenttobed.②Itisthefirst(second...)timethat...“是第一(二)...次...”。ItisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.5).Ithappens(seems,looks,appears)that...该句型中it是形式主语,that引导的是主语从句,主句中的happen,seem等词是不及物动词。Ithappened(sohappened)thathemethisteacherinthestreet.碰巧...I
5、tseemsthathewillbebackinafewdays.看来...6).Itdoesn’tmatterwhether(if)...该句型中whether(if)引导的从句是真正主语,该句型常译为"不论(是否)...没关系...。Itdoesn’tmatteriftheyareold..2.作形式主语替代不定式1).Ittakessb....todosth."做...要花费某人.." IttookthousandsofpeoplemanyyearstobuildtheGreatWall.2).Itiskind(ofsb.)todosth.主句中的形容词必须是能表示逻辑主语特征
6、的形容词。常见的有:bad,brave,careless,clever,cruel,foolish,stupid,wisewrong等。这个句型可以改写为:sb.iskindtodosth.。 Itiskindofyoutosayso.=Youarekindtosayso.3).Itisnecessary(forsb.)todosth.常见的形容词有:①important,necessary,natural②easy,safe,common,normal,hard,difficult,dangerous,等。在①中的形容词作表语可以用从句改写,如:Itisimportantfor
7、hertocometotheparty.=Itisimportantthatshe(should)cometotheparty.Itisnogood(use)doingsth.该句型中的真正主语是动名词短语,主句中的表语可以是nogood,nouse,uselessItisnogoodlearningEnglishwithoutwritingEnglish.It'suselesstryingtoarguewithShylock..
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