be动词的用法总结.pdf
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1、be 动词的用法总结 Be 动词的用法口诀:我用 am,你用 are,is 连着他,她,它;单数名词用 is,复数名词全用 are.变疑问,往前提,句末问号莫丢弃。变否定,更容易,be 后 not 莫忘记。疑问否定任你变,句首大写莫迟疑 一、系动词 be be 可以用作连系动词,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/must be(助动词/情态动词原形);have/has/had been(助动词过去分词)等.如:To help animals is helping people.(一般现在时)
2、The twins were very busy yesterday.(一般过去时)It will be sunny tomorrow.(一般将来时)She has been ill for over a week。(现在完成时)二、助动词 be Be 可以用作助动词,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:The girls is reading and copying the new words now。Young Tom was having an English class at this time yest
3、erday morning.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:Tea is grown in my hometown.(一般现在时的被动语态)This building was built three years ago。(一般过去时的被动语态)Our classroom has been cleaned and tidied already.(现在完成时的被动语态)How could this kind of cakes be made in your home?(含情态动词的被动语态)That is a day never to be f
4、orgotten.(动词不定式的被动语态)3。be+going to do,表示“打算或将要做某事,be 有现在和过去两种形式。如:We are going to plant trees in the park tomorrow。I didnt know if she was going to come here.4。be+to do,表示“按计划安排将要做某事。如:The new shop is not to be opened till next Monday。【练习】翻译下列句子 1。他们现在正在开会。They a meeting now.2.如今英语越来越重要了.English mor
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