be been讲下这两,英语动词时态用法详解什么的,能讲的都讲,最好举下例子……

在英语里,共有哪几种时态?说一下它们的构成、用法、注意事项和典型的例子._百度作业帮
在英语里,共有哪几种时态?说一下它们的构成、用法、注意事项和典型的例子.
1.一般现在时:表示真理性,经常性,习惯性,普遍性.[在口语里常用,在叙事性文章和故事里很少用] 例句:1.The earth is smaller than the sun.[状态][真理性] 2.Tom gets up early every morning.[动作][经常性和习惯性] 3.Everybody knows him.[普遍性] 2.过去时:表示过去某一时间里发生的动作或状态.[叙事性的文章和故事里最常用的时态].例句:1.Yesterday we went to the park.[动作] 2.The book was there ten minutes ago.[状态] 3.将来时:表示将来某一时间里发生的动作或状态.例句:1.Tom will help you tomorrow.[动作] 2.We shall be here in time next time.[状态] 4.过去将来时:表示从过去某一时间看将在以后某一时间里发生的动作或状态.[注意不要跟现在联系起来] 例句:1.Ten years ago,Mary said she would finish the work in a few days.[动作] 2.Yesterday he thought you would be a good player after five years.[状态] 5.现在完成时:表示在现在之前就已经完成的动作或状态[要特别注意不包括现在].例句:1.We have done our homework.[动作] 2.He has been a doctor now..[状态] 6.过去完成时:表示在过去某时之前就已经完成的动作或状态.例句:1.Three days ago he had already finished his homework.[动作] 2.When he was a boy,he had already been a head of the boys.[状态] 7.将来完成时:表示在将来某时之前将完成的动作或状态.例句:1.Tomorrow morning,I will have cleaned the windows.[动作] 2.Next Sunday,he will have been a new doctor.[状态] 8.过去将来完成时:表示在过去某一时间之前本该完成的动作或状态.[一般用于虚拟语态] 例句:1.If he had worked hard enough,he would have built a new house.[动作] [实际情况是因为他不够努力,所以新房子连影子都没有] 2.If he were alive,he would have been a doctor now..[状态][实际情况是他已经去世,所以永远成不了医生] 9.现在进行时:在现在之前开始,以后还要延续一段时间的动作.[要注意只有延续性动词可以用进行时].例句:Tom is reading a book.10.过去进行时:在过去某时之前开始,以后还要延续一段时间的动作.[要注意只有延续性动词可以用进行时].例句:The dog was eating a bone.11.将来进行时:在将来某时之前开始,以后还要延续一段时间的动作.[要注意只有延续性动词可以用进行时].例句:At ten tomorrow morning,I will be writing the letter for you.12.过去将来进行时:从过去某时来看将再以后某时之前开始,以后还要延续一段时间的动作.[要注意只有延续性动词可以用进行时].例句:Jack told me that he would be working hard the next year.13.现在完成进行时:在现在之前就已经完成并且还要延续下去的动作.[较少用] 例句:Tom has been reading this book for over ten hours.14.过去完成进行时:在过去某时之前就已经完成并且还要延续下去的动作.{很少用} 例句:The workers had been building the railway then.15.将来完成进行时:在将来某时之前就已经完成并且还要延续下去的动作.{很少用} 例句:They will have been making their efforts after that time.16.过去将来完成进行时:在过去某时之前看来将来某时应该已经完成并且还要延续下去的动作.{很少用} 例句:We thought they would have been doing physical training till then
共有16时态: 一般过去时与过去完成时都表示发生在过去的动作或存在的状态.例子:
1:可根据句子的时间状语来确定句子的时态.一般过去时通常有表示过去的时间状语(如:last year/month/week,yesterday等)修饰.而过去完成时也有典型的时间状语,即by引导的表示过去的时间状语(如by the end of last month)修饰.
例:The new suspensio...英语语法1.could have been/would be是什么用法,都可以表示虚拟语气吗?2.the editor was getting impatient.这是系表结构的进行时态吗?.如果could/must have been+人,_百度作业帮
英语语法1.could have been/would be是什么用法,都可以表示虚拟语气吗?2.the editor was getting impatient.这是系表结构的进行时态吗?.如果could/must have been+人,
1.你说的是虚拟语气中的两种用法a.与现在事实相反的虚拟语气即if从句的动词用过去时,主句则用过去时助动词.例:If i were rich,i would help you.如果我有钱,可事实并非如此,即我现在没有钱.b.与过去事实相反的虚拟语气即if从句的动词要用过去完成时,主句则是助动词的过去时再加上“have+过去分词”例:if i had arrived earlier,i could have met him.要是当时我早点到,就可以见到他了.可过去当时事实并非如此.2.过去进行时态.
1. 都是if 之后跟的虚拟语气, could have been 表达过去, would be是将来例子:If it weren't you, i could have been killed. (虚拟语气主句谓语动词总是用were)如果不是你, 我可能就给杀死了。If you don't show up tomorrow, i would be kill...英语里,什么是非谓语,什么是同谓语?具体用法?最好能举下例子如题_百度作业帮
英语里,什么是非谓语,什么是同谓语?具体用法?最好能举下例子如题
在句子中充当除谓语以外的句子成分的动词形式叫做非谓语动词.非谓语动词分为三种形式:不定式,动名词,和分词(分词包括现在分词和过去分词).1)不定式时态\语态 主动 被动 一般式 to do to be done完成式 to have done to have been done2)动名词时态\语态 主动 被动 一般式 doing being done完成式 having done having been done3)分词时态\语态 主动 被动 一般式 doing being done完成式 having done having been done 否定形式:not +不定式,not + 动名词,not + 现在分词例句:He has written two articles for the journal,one to be published in this issue,the other to come out in the next.To tell you the truth,I don' t know computers very well.Generally speaking,frankly speaking,strictly speaking.同谓语:The news that we won the game went around our school.从句对THE NEWS的补充说明..这就是同谓语化学知识在生产生活中有广泛的应用(1)时下兴起的环保炭雕工艺品,是以活性炭为原料,采用传统手工雕刻而成,炭雕工艺品既能装饰居室,又对甲醛等有害气体具有很强的作用,能有效地净化室内空气.(2)通常所说的煤气中毒是指(填化学式)引起的中毒.(3)长期使用的热水瓶内胆常有一层水垢(主要成分是碳酸钙),可以用稀盐酸除去,反应的化学方程式为.(4)为防止彩色照片褪色,可将照片用塑料薄膜封闭,目的是.(5)为保证安全,凡是可燃性气体,点燃前都要检验气体的.(6)不经常使用的锁,可向锁眼中加入少量铅笔芯粉末,以容易开启,这是因为.
提 示 请您或之后查看试题解析 惊喜:新移动手机注册无广告查看试题解析、半价提问一类词的用法eihter or neither nor both and not only but also 这些的意思还有谓语动词的正确形式 while after when before since 的用法.时态都是什么,主句,从句的时态都是什么?as这个词当因为讲的时候 是否可以与 because互换?_百度作业帮
一类词的用法eihter or neither nor both and not only but also 这些的意思还有谓语动词的正确形式 while after when before since 的用法.时态都是什么,主句,从句的时态都是什么?as这个词当因为讲的时候 是否可以与 because互换?
eihter ……or…… (两个之中)或者……或者…… neither…… nor ……(两个)既不……也不…… both and (两个)都 not only but also(两个)不仅……而且…… 除both and外谓语动词都遵循临近原则而.both and谓语动词用复数形式.

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