小学英语四种时态语法讲解1ppt课件

四种时态讲解,小学的时态分几种？,一、现在进行时（四年级下）二、一般现在时（五年级上）三、一般将来时（五年级下）四、一般过去时（五年级下）,过去,现在,将来,一般过去时,一般现在时,现在进行时,一般将来时,时间轴,一、一般过去时,1、概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。2、标志词：1）yesterday或以其构成的短语：yesterdaymorning(afternoon,evening)等；2)由“last+一时间名词”构成的短语：lastnight,lastyear(winter,month,week)等；3)由“时间段+ago”构成的短语：longlongago，amomentago,ashorttimeago,threedaysago等；4)其它：justnow等,一般过去时,3、基本结构：,be动词（注意be的人称变化，单数用was，复数用were）IwasintheclassroomyesterdaymorningHewasintheclassroomyesterdaymorningTheywereintheclassroomyesterdaymorning行为动词（动词过去式规则变化和不规则变化）Ivisitedmygrandparentsyesterday.,1）动词过去式规则变化,2）动词过去式不规则变化要牢记：,am,is-wasare-weredo-didsee-saw,say-saidgive-gaveget-gotgo-wentcome-camehave-had,eat-atetake-took,run-ran,sing-sangput-put,make-made,read-readwrite-wrote,draw-drew,drink-drank,fly-flew,ride-rodespeak-spokesweep-swept,buy-boughtswim-swam,sit-satbringbroughtcan-couldcut-cutbecome-becamebegin-begandraw-drewfeel-feltfind-foundforget-forgothear-heardkeep-keptknow-knewlearn-learnt（learned）leave-leftlet-letlose-lostmeet-metsleep-sleptteach-taughttell-toldwrite-wrotethink-though,二、一般现在时,一般现在时：1、概念：经常、反复发生的动作或行为及现在的某种状况。2、标志词：always,usually,often,sometimes,everyweek(day,year,month),onSundays,etc.3、基本结构：be动词(is/am/are)；行为动词(基本用原形，但主语三单动词要加s/es)e.g：Iamateacher.(现在的状态)Hegoestoschooleveryday.Katieoftenhasbreakfastat7:15.Theearthmovesaroundthesun.(科学事实或真理),一般现在时常以动词原形表示，但当主语是第三人称时，谓语动词要用第三人称单数形式，加-s/es。,动词第三人称变化规则：,三、现在进行时,现在进行时,1、概念：现在（说话的瞬间）正在进行或发生的动作，强调“此时此刻”。2、标志词：look看；listen听；now现在；3、基本结构：be+动词ing（也叫现在分词）（主语不同，be的形式也不同）Look！Itisrainingoutside.Listen!SheissinginganEnglishsong.Wearereadingstorybooksnow.,现在分词的变法规律：,1、一般在动词词尾加上-ing,E.g.jump-jumping2、以不发音字母e结尾的动词，先去e，再加-ing.have-having/write-writing/dance-dancing/take-taking/make-making/come-coming3、重读闭音节结尾的词，双写尾字母，再加上-ing.sitsitting/put-putting/swim-swimming/run-running/skip-skipping/hop-hopping,四、一般将来时,一般将来时,1、概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事。2、标志词：tomorrow,nextday(week,month,year),soon,thedayaftertomorrow（后天）等。3、基本结构：1）begoingto+动词原形；（be有人称变化）2）will+动词原形.3）shall动词原形（第一人称）Imgoingtohaveapicnicthisweekend.TomorrowwillbeMid-Autu