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1、陈述句含义：用于陈述事实和观点的句子。陈述句包括肯定结构和否定结构。Thisisadesk.（肯定结构）Hecansinganddance.（肯定结构）Hedoesn’thaveacomputer.（否定结构）Therearen’tanypictures.（否定结构）肯定句变否定句：1.be动词的否定式be:am,is,are,waswere构成否定式时，一律在后面加否定词notHeisreading.→Heisnotreading.TheyarefromChina.→Theyarenotfro
2、mChina.2.情态动词的否定式情态动词：can,could,must,may,might,will,would，shall,should,need,……构成否定式时，一律在情态动词后面加否定词notIcanswim.→Icannotswim.Youshouldarrivehereontime.→Youshouldnotarrivehereontime.3.实意动词的否定句实意动词：即行为动词,表示动作的动词。它分为及物动词和不及物动词两种（及物动词是指后面要求有宾语的动词；不及物动词指后面不
3、需要跟宾语的动词）构成否定式时，要借助助动词do,does,did，在一般现在时中用do或者does，在一般过去时中用did。结构为：主语+don’tdoesn’tdidn’t+动词原形+其它Ilikepopmusic.→Idon’tlikepopmusic.Sheoftenswims.→Shedoesn’toftenswim.Hehandedinhishomework.→Hedidn’thandinhishomework.一般疑问句含义：一般疑问句是疑问句的一种。它是只用yes（是）或no
4、（否）来回答的句子。其结构是：系动词be/助动词/情态动词+主语+其他成分1)谓语动词是be动词规律：Heisastudent.Isheastudent?7Sheisswimming.Issheswimming?1)谓语中含有助动词have/has/had(通常是在现在完成时和过去完成时中：have/has/had+过去分词)规律：Tomhasfinishedhishomework.→HasTomfinishedhishomework?Ihaveeatenbreakfast.→Haveyouea
5、tenbreakfast?2)谓语动词中含有情态动词时。规律：Hecanswim.→Canheswim?Ishouldgotoschool.→ShouldIgotoschool?3)谓语动词是行为动词，必须在句首加上助动词。加上这些助动词后，句子中谓语动词必须用原形。规律：Tombuiltasciencelabhimselflabwhenheis20yearsold.→DidTombuildasciencelabhimselflabwhenheis20yearsold？Shelikesdrink
6、ingmilk.→Doesshedrinkmilk?Theyoftenswim.→Dotheyofenswim.注意：1.把肯定句改成一般疑问句时，要注意句中是否有already,some,something,somebody等词，如果有，就要进行改变。already,some,something,somebody等分别改成yet,any,anything,anyoneShehasalreadyfinishedherwork.→Hasshefinishedherworkyet?2.注意人称的变化
7、。Mymotherisateacher.Isyourmotherateacher?3.以下问句固定的回答：Isthis/that/a/an+物--------yes,itis./No,itisn’t.Arethey/those/these…?---------Yes,theyare./No,theyaren’t.特殊疑问句含义：以疑问代词或疑问副词开头，提出疑问的句子。基本结构：特殊疑问词+一般疑问句注意：A疑问词的选择：1.疑问代词who谁，whom谁，whose谁的，which哪些(个)，w
8、hat什么2.疑问副词（作状语）7when何时，where何地，why为什么，how如何，howmuch多少(不可数)，howmany多少(可数），howlong多久，howold多大年纪，howfar多远。1)问“谁”用who或whomLeileiisadoctor.Whoisadoctor?(对主语提示用who,对宾语提问用who,whom均可)2)问“谁的”用whoseThisishisbook.Whosebookisthis?3)问“哪个”用which,whatIlikethisonea
