2013高中英语单词必备知识点：高中英语IT用法考点聚焦.doc

it的用法一、考点聚焦1、it的基本用法（1）用作人称代词，代替前文提到过的事物。Thetrainhasarrived.Itarrivedhalfanhourago.（2）用以代替提示代词this,that。—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）作形式主语。Itisnoteasytofinishtheworkintwodays.Itisnousecryingoverspiltmilk.Itisaspitythatyoudidn’treadthebook.（8）作形式宾语。Ithinkitnousearguingwithhim.IfounditveryinterestingtostudyEnglish.Hemadeitclearthathewasnotinterestedinthatsubject.（9）用于强调结构。ItwasXiaomingwhom(that)Imetinthestreetlastnight.ItwasinthestreetthatImetXiaominglastnight.ItwslastnightthatImetXiaominginthestreet.ItwasIwhometXiaominginthestreetlastnight.2、含有“Itis…”的句子（1）Itistime(forsb.)todosth.Itis(high)timethatsb.didsth.(虚拟语气)（2）Itis+形容词（+of/forsb.）+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、likely、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+…Wasitinthestreetthatyoumether?Whowasitthatcalledhim“comrade”?ItwasnotuntilyesterdaythatImetmyoldfriend.Itisinasmallfactorythatmybrotherisgoingtowork.（注意上述各句均为强调句型的“考点”）比较：Itisasmallfactorywheremybrotherisgoingtowork.（定语从句）（6）Itissaid/reported/announced/(well)known…that…（7）Itis/was+时间+since…从……已多久了。ItisthreeyearssinceImethiminBeijing.ItwasalongtimesinceI(had)livedinthatsmallmountainvillagewiththesefarmers.（注意两句中的时态）ItisfivemonthssinceIarrivedinNewYork.我到纽约已经五个月了。ItisfivemonthssinceIwasinNewYork.我离开纽约已经五个月了。（注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则从动作或状态结束时算起。）（8）Itis+时间+before…这个句型和上面句型中时间都是时间段，如long、years、months、weeks、fivedays、threehours、twentyminutes等。不过主句的时态多用