小学Be动词

be是一个多功能动词，在初级英语里可见四种用法：功能一，系动词bebe为连系动词，中心词义是是，句型为主+系+表结构。be的形式常用am,is,are(现在式);was,were(过去式);will/can/may/mustbe(助动词/情态动词+原形);have/has/hadbeen(助动词+过去分词)等。如：Tohelpanimalsishelpingpeople.(一般现在时)Thetwinswereverybusyyesterday.(一般过去时)Itwillbesunnytomorrow.(一般将来时)Shehasbeenillforoveraweek.(现在完成时)功能二，助动词be助动词be，无词义，辅助主要动词一起在句中作谓语动词。用法如下：1.be+doing：构成进行时态，有现在和过去两种进行时态。如：Thegirlsisreadingandcopyingthenewwordsnow.YoungTomwasalwaysaskingquestionsandtryingoutnewideas.2.be+done：构成被动语态(主语是动作的承受者，done必须是及物动词)。如：Teaisgrowninmyhometown.(一般现在时的被动语态)Thisbuildingwasbuiltthreeyearsago.(一般过去时的被动语态)Ourclassroomhasbeencleanedandtidiedalready.(现在完成时的被动语态)Howcouldthiskindofcakesbemadeinyourhome?(含情态动词的被动语态)Thatisadaynevertobeforgotten.(动词不定式的被动语态)3.be+goingtodo，表示打算或将要做某事，be有现在和过去两种形式。如：Wearegoingtoplanttreesinthepark.Ididn'tknowifshewasgoingtocomehere.4.be+todo，表示按计划安排将要做某事。如：ThenewshopisnottobeopenedtillnextMonday.OnenightanangelcametoMaryandtoldherthatshewastohavethisspecialboy.功能三，therebetherebe句式为：therebe+主语部分+状语部分，表示某处存在某物，be常用现在时，过去时和将来时等。如：Oh,cool!Andtherearemanythingstosee.ThereisevenadeerparkinSanya.Thereareabout80pyramidsinEgypt.Willtherebeafootballmatchinyourschoolnextweek?功能四，实义be可以将be视为实义动词，因为它具有实际的词义，如成为;做;发生;举行;逗留;到达等。如：Hisdaughterwantstobeadoctorforanimalsinhertwenties.Kate'sbirthdaypartywillbeathalfpastsixthisevening.JimhasbeeninChinaformorethantwoyears,buthehasnotyetbeentoYichang.