英语选修六语法

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1、选修6语法Grammarit的用法一、指代（后行）it:1.It的基本用法是用来指代上文所提到的事物。如：Whateveryoudoorsay,askyourselfwhetheritisintheinterestsofthepeople.A:Passmeabluepen.B:Hereitis/Hereyouare.2.it,that,one,theone,ones,theones用于指代用法时的区别:it代替上文提及的原物(复数用they)；one指代上文提及的、泛指的可数名词单数（复数ones）；

2、that指代上文提及的定指的可数名词单数或不可数名词（复数those）,theones相当于these,those。Thereisariveralongthevillage.______isariverwithalonghistory.Theredpenisonthedeskand______isTom's.Thispenismineand______isTom's.Thispenismineand______onthedeskisTom's.Motherboughtanewbikeandgave__

3、______tome.Mymotherboughtmeanewdictionaryandhermotherwillbuyher_____too.Milkwithsugartastesbetterthan________withoutsugar.Apencilwithrubberismoreusefulthan________withoutrubber.BikesmadeinShanghaiarebetterthan________madeinChangsha.2）用以代替提示代词this,that。—

4、What’sthis?—It’saknife.—Whosewatchisthat?—It’smine.（3）起指示代词的作用，指一个人或事物。—Whoisknockingatthedoor?—It’sme.（4）指环境情况等。Itwasverynoisy(quiet)attheverymoment.（5）指时间、季节等。—Whattimeisit?—It’seighto’clock.Itoftenrainsinsummerhere.（6）指距离。Itisalongwaytotheschool.（7）作

5、形式主语。Itisnoteasytofinishtheworkintwodays.Itisnousecryingoverspiltmilk.Itisaspitythatyoudidn’treadthebook.-6-（8）作形式宾语。Ithinkitnousearguingwithhim.IfounditveryinterestingtostudyEnglish.Hemadeitclearthathewasnotinterestedinthatsubject.（9）用于强调结构。ItwasXiaomi

6、ngwhom(that)Imetinthestreetlastnight.ItwasinthestreetthatImetXiaominglastnight.ItwslastnightthatImetXiaominginthestreet.ItwasIwhometXiaominginthestreetlastnight.2、含有“Itis…”的句型（1）Itistime(forsb.)todosth.Itis(high)timethatsb.didsth.(虚拟语气)（2）Itis+形容词（+of/f

7、orsb.）+todosth.通常用of的词有brave、clever、careful、hopeless、kind、good、naughty、nice、silly、stupid、foolish、wise等。（3）Itis+形容词+that+sb.+(should)dosth.（虚拟语气）能用于这个句型的形容词有strange、wonderful、natural、good、proper、right、wrong、well、fortunate、important、necessary、useless、like

8、ly、probable、impossible等。有时可省去should而直接用动词原形。如：Itisimportantthatweshouldpaycloseattentiontograin.Itisnaturalthathe（should）sayso.（4）Itisnouse/good+doingsth.Itisnousetryingagain=Itisofnousetotryagain.（5）Itis+被强调部分+that/who+…Wasitint