小学英语语法:Be的四功能

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作者 1tina 米粒妈咪课堂  ← 点击红色字,关注公众号
2018-04-18 10:15 字数 2226 阅读 1230评论 0

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be

be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,therebe

therebe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.

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