中考英语语法知识难点it与there be的用法

中考英语语法知识难点（十五）（十五）it与therebe的用法I．要点1、it的用法（1）用作人称代词，代替前文提到的无生命的事物，动植物、婴儿及指示代词this,that，如，Ihaveanewpen.Itisbeautiful.TheBrownshaveanewbaby.It'scute.（2）用来表示时间、天气、距离等，如，It'stwelveo'clocknow.It'sfinetoday.（3）用作引导词，代替由不定式，ing形式或从句表示的真正的主语或宾语，如，It'snogoodtellinghimthat.It'snecessaryforyoutodoso.（4）用在强调结构中，构成强调句式：Itis/was+被强调部分+that/who/whom+句子其余部分，可强调除谓语以外的句子其他成分，如，ItwasthismorningthatIsawhiminthestreet.ItwasIwhosawhiminthestreetthismorning.ItwasinthestreetthatIsawhimthismorning.ItwashimwhomIsawinthestreetthismorning.2、therebe句型英语表示某时某处或某物时，常用therebe句型，这是一种倒装结构，如，Therearealotofstudentsplayingontheground.Thereisgoingtobeatestthisafternoon.当主语有两个或两个以上时，动词be常和最近的那个主语取得一致，如，Thereisapenandthreepencilsinthepencil-box.Thereisn'tadesk,abenchandthreechairsintheroom.Therearelotsofpeoplelikeit,aren'tthere?therebe句型，谓语动词除be之外，还可用其他表示存在，位置移动等意义的不及物动词或词组，如exist,stand,lie,enter,come,happentobe,appeartobe等，如，Therestandsahouseatthefootofthehill.therebe句型表示"存在"而have表"有"、"拥有"，所以therebe中be不能换成have，但当have表示事物的特征时，可用"主语+have"结构替换therebe句型，如：Therearefivedoorsinthehouse.Thehousehasfivedoors.

therebe的其它句型：1、Theremustbeameetingintheoffice.2、Therehavebeengreatchangessince1979.3、Therebeingnobus,wehadtowalkhome.I．例题例１____thathewenttosleep.AItwasuntilmidnight

BThatwasuntilmidnightCItwasnotuntilmidnight

DThatwasnotuntilmidnight解析：该题答案为C。强调until结构时，要将否定词not移到until前。又如：Hedidn'tleaveuntiltwelve改为Itwasnotuntiltwelvethatheleft.例２Therearealotofstudents____intheclassroom.Atalk

Btalking

Ctalked

Dtotalk解析：该题正确答案为B。Therebe句型为倒装句，可换为Al