(完整版)couldhavedone用法详解

(完整版)couldhavedone用法详解
(完整版)couldhavedone用法详解

could have done 用法详解

1.表示主观猜测:即对已经发生动作或已经存在的状态作出主观上的猜测,通常可译为“可能(已经)”,有时需根据具体语境来翻译。如:

Tom could have taken the money; he was here alone yesterday. 有可能是汤姆把钱拿走了,昨天他单独一个人在这里呆过。

We knew he couldn’t have paid for it, because he had no money. 我们知道不可能是他付了这笔钱,因为他没钱。

该用法也可将could换成can,但这只限于否定句和疑问句,因为can表推测时不用于肯定句(而could可以用于肯定句)。如:

Can he have left already? 他会已经离开了吗?

They can’t have gone out because the light’s on. 他们不可能出去了,因为灯还亮着。

2.表示未曾实现的能力:即表示过去本来有能力可以做某事的,但实际上没有那样去做,通常译为“本来可以”“本来能力”等。如:

The worst of it is that I could have prevented the accident. 最糟糕的是我本来可以防止这次事故的。

I could have passed my examination easily but I made too many stupid mistakes. 我本可以轻易通过考试,但我犯了太多不该犯的错误。

有时用于反语。如:

You’ve broken my pen—thanks for nothing, I could have done that for myself. 你把我的笔给弄坏了——你得了吧,就那我自己也会弄。

3.表示未实现的可能性:即表示过去本来可能发生情况,而实际上没有发生,通常译为“本来可以”“本来可能”等。如:

She could have been seriously injured. 她本来可能伤得很重的。

It’s difficult enough, but it could have been worse. 这事情够困难的了,本来可能会更糟呢。

有时也可根据语境译为“好在没有”“差点”,尤其是当谈论的是“不好”的情况时。如:She felt miserable. She could have cried. 她感到很痛苦,她差点哭了。

Why did you throw the bottle out of the window? Somebody could have been hurt. 你为什么把瓶子扔出窗外呢?好在没有砸伤人。

4.表示未曾实现的想法:即表示过去本来有做某事的打算或意图,但实际上没有实现,通常译为“本来可以”。如:

I could have lent you the money. Why didn’t you ask me? 我本来可以借这笔钱给你的。你为什么不向我提出?

I could have given you some hints, but I suppose you thought yourself too grand. 我本可以给你点提示的,但是我认为你太自负了。

5.表示未曾实现的选择:即表示过去本来可以有机会选择做某事,但实际上没有那样做,通常译为“本来可以”。如:

You needn’t have typed it twice. You could have used a carbon. 你没必要打两遍的,你当时本可以用复写纸打。

You needn’t have walked up; you could have taken the lift. 你没必要走着上去,你本来可以乘电梯的。

6.表示批评或责备:即表示过去本来有责任或义务应该做某事的,但实际上却没有做成,含有批评和责备的意味,通常译为“本来应该”“本来可以”等。如:

You could have started a little earlier. 你本可早点动身的。

You could have helped me—why did you just sit and watch? 你本来可以帮我一把嘛——为什么你只是坐在那儿观望呢?

7.表示可能达到的极限:表示即使人们尽力而为去做某事,但还是未能做成,通常用于否定句。如:

I couldn’t have won, so I didn’t go in for the race. 反正我也赢不了,所以我就没有参加赛跑。

I couldn’t have enjoyed myself more—it was a perfect day. 我玩得没法再痛快了——这一天简直痛快极了。

8.表示惊讶:表示对所发生的情况感到惊奇,含有“竟然”的意味。如:

It seems inconceivable that the accident could have happened so quickly. 这一事故发生得这么快,简直不可思议。

Well, I’m blowed! I should never have thought you could have done it. 真想不到!

我从未想到居然办得到。

9.用于虚拟语气:在虚拟条件句中,当谈论过去的情况时,其句型通常是:主句用“co uld / would / should /might +have+过去分词”,从句用过去完成时。如:

If he had known the facts, he could have told us what to do. 如果他了解事实,他是可能告诉我们怎样做的。

If anybody had asked me, I could have told them what happened. 如果有谁问过我,我可以告诉他们发生了什么情况。

10.用于口语惯用表达:如用于I could have sworn…,表示“我可以发誓”“我千真万确”。如:

I could have sworn I’d paid that bill. 我可以发誓我付过账。

I could have sworn I heard a knock at the door. 我千真万确听到了敲门声。

◆摘自《中学英语高频词详解词典》◆

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一、 独立主格结构是一个名词或代词(作为逻辑主语),加上一个形容词、副词、介词短语、分词、不定式等在句中作状语。它有以下三个特点: (1)结构的逻辑主语与句子的主语不同,它独立存在。 (2)名词或代词与后面的形容词、副词、介词短语、分词、不定式等存在逻辑上的主谓关系。 (3)独立主格结构一般用逗号与主句分开,但与主句之间不能使用任何连接词。 二、 英语中,的形式是:名词或代词跟形容词、副词、介词短语、非谓语动词连在一起,构成。 1.名词/ 代词+ 不定式。如: A house to be built, we must save every cent. 由于要建一座房子,我们必须节省每一分钱。 Now here is Li Lei, Wei Fang to come tomorrow. 现在李蕾来了,魏方明天到。 2.名词/ 代词+ -ing分词。如: The bus coming here soon, we should get everything ready. 汽车很快就要来了,我们应该把一切事情准备好。 Mother being ill, Li Lei was very worried. 母亲病了,李蕾非常焦急。 3.名词/ 代词+ 动词的过去分词。如: His cup broken, he used his bowl instead. 茶杯破了,他就用碗来代替。 4.名词/ 代词+ 形容词。如: The ground muddy, we should be careful. 地面泞泥,我们应该小心。 5.名词/ 代词+ 副词。如: The class over, we all went out to play. 下课后,我们都出去玩。 6. Glasses in his hand, he asked where his glasses were. 手里拿着眼镜,他问他的眼镜哪去了。 三、 在句子中作状语,表示时间、原因、条件和伴随等情况。 1.作时间状语 School over, the students went home. 放学后,学生们都回家了。 The ceremony ended, the games began. 仪式结束后,比赛开始了。 2.作条件状语 It being fine tomorrow, we’ll go boating. 如果明天天气好的话,我们就去划船。

现在分词用法总结

现在分词 一、基础知识: 现在分词(也叫动名词):表示主动和进行。 基本形式:doing 否定式:not doing 被动式:being done 完成式:having done 二、具体用法: 1.动名词作主语和宾语: (1)把一个动词变成-ing形式可以当做名词来用,表示一种经常性、习惯性的动作,可在句中充当主语和宾语。 eg: Working with you is a pleasure. I like reading in my free time. (2)可以用it做形式主语或形式宾语放在前面,再用动名词做真正的主语或宾语放在后面,这种用法常用于以下句式: ①It is/was no use/good doing sth. 做某事是没用的/没有好处的。 eg: It’s no use begging for his mercy. It’s no good smoking too much. ②It is/was a waster of time doing sth. 做某事是浪费时间的。 eg: It is a waste of time copying others’ homework. ③It is/was worth doing sth. 做某事是值得的。 eg: It was worth making the effort. ④There is/was no sense in doing sth. 做某事是没有道理的/意义的。 eg: There is no sense in arguing with your wife. ⑤There is/was no point (in) doing sth. 做某事是没用的/无意义的。 eg: There is no point in getting angry. ⑥There is no shame in doing sth. 做某事是不丢脸的。 eg: There is no shame in saying sorry to your friends. ⑦There is no telling…无法预言会… eg: There is no telling what will happen. ※注意:动名词作主语时,其前可用名词所有格和形容词性物主代词修饰,即one’s doing sth.作主语。 eg: Tom’s being late again made his teacher angry. My going to Beijing University is my parents’ biggest dream. (3)动名词作宾语分为两种情况:动名词后的宾语和介词后的宾语 ①有些动词后只能接动名词作宾语,常见的有: avoid, advise, allow, admit, appreciate, consider, deny, enjoy, keep, finish, suggest, dislike, delay, risk, escape, imagine, mind, miss, permit, practice, fancy, can’t help, be busy, give up, can’t stand, feel like等。 eg: You must avoid being hurt when crossing the road. ②有些动词后即可接动名词也可接不定式作宾语,常见的有: A: start, begin, intend, attempt, continue等后接doing和to do无区别。 B: like, love, prefer, hate等后接doing和to do略有区别,后接doing侧重经常习惯性的行为,后接to do侧重具体的某一次行为。 eg: I like swimming in summer but today I like to see a film at home

动词的分类及用法详解学习资料

动词的分类及用法详 解

动词的分类及用法 第一节动词的定义与分类 一、什么是动词 动词是表示人或事物的动作、存在、变化的词。动词是用来表示主语做什么(即行为动词),或表示主语是什么或怎么样(即状态动词)的词,例如: The boy runs fast.(这个男孩跑得快。)runs表示主语的行为 He is a boy.(他是个男孩。)is与后面的表语a boy表示主语的状态 二、动词的分类 动词可以按照含义及它们在句中的作用分成四类,即行为动词(也称实义动词)、连系动词、助动词和情态动词。 (一)行为动词 行为动词(实义动词)是表示行为、动作或状态的词。它的词义完整,可以单独作谓语。例如: I live in Beijing with my mother.(我和我妈妈住在北京。)live,住 It has a round face.(它有一张圆脸。)has,有 (二)连系动词 连系动词是表示主语“是什么”或“怎么样”的词,它虽有词义,但不完整,所以不能单独作谓语,必须跟表语一起构成合成谓语,例如: We are in Grade Two this year.(今年我们在两年级。)are,是are 这个词的词义“是”在句子中常常不译出。 连系动词可具体分为三类: 1、表示“是”的动词be。这个词在不同的主语后面和不同的时态中有不同的形式,is,am,are,was,were,have/has been等要特别予以注意。例如: He is a teacher.(他是个教师。) He was a soldier two years ago.(两年前他是个士兵。) We are Chinese.(我们是中国人。) 2、表示“感觉”的词,如look(看起来),feel(觉得,摸起来),smell(闻起来),sound(听起来),taste(尝起来)等,例如: She looked tired.(她看一去很疲劳。) I feel ill.(我觉得不舒服。) Cotton feels soft.(棉花摸起来很软。) The story sounds interesting.(这个故事听起来很有趣。) The flowers smell sweet.(这些花闻起来很香。) The mixture tasted horrible.(这药水太难喝了。) 3、表示“变”、“变成”的意思的词,如become, get, grow, turn, 都解释为“变”、“变得”,例如: She became a college student.(她成了一名大学生。) He feels sick. His face turns white.(他感到不舒服,他的脸色变苍白了。) 仅供学习与交流,如有侵权请联系网站删除谢谢2

独立主格用法归纳总结

独立主格结构介词使用的问题 在“名词或代词+介词短语”这类独立主格结构中,当其中的介词是in时,其前后的两个名词通常不加任何修饰语(如物主代词或冠词),也不用复数。如: A girl came in, book in hand. 一个少女进来了,手里拿着书。 The soldiers dashed in, rifle in hand. 士兵们端着枪冲了进来。 但如果是其他介词,则不受此限制。如: We walked out, one behind the other. 我们一个接一个地走了出来。 He was waiting, his eyes on her back. 他在等着,眼睛望着她的背影。 The old woman sat down, traces of tears still on her cheeks. 老太太坐了下来,面颊上还带有泪痕 ===================================================================== 独立主格用作伴随状语 独立主格结构在句中一般作状语,表示时间、条件、原因、伴随状况等,还可以作定语。下面给大家列举一些独立主格用作伴随状语的例子: She gazed, her hands clasped to her breast. 她凝视着,双手叉在胸前。 We divided the work, he to dean the window and I to sweep the floor. 我们分了工,他擦窗户,我扫地。 A number of officials followed the emperor, some to hold his robe, others to adjust his girdle and so on. 许多官员尾随皇帝之后,有的拎着皇帝的衣袍,有的则给他整腰带,等等。 Their room was on the third floor, it’s window overlooking the sports ground. 他们的房间在三层楼上,窗户俯视着操场。 He guiding her, they stumbled through the street. 他引着她,两个人蹒跚地穿过那条街。 He, God willing, would be in the village before the second next month. 他,如果上帝允许,将于下月2日前来到这个村庄。 He died in 1892, his death being considered as a national calamity. 他死于1892年,他的逝世被认为是举国的不幸。 独立主格用作原因状语 独立主格结构在句中一般作状语,表示时间、条件、原因、伴随状况等,还可以作定语。下面给大家列举一些独立主格用作原因状语的例子: All our savings gone, we started looking for jobs. 积蓄全部用完了,我们就开始找工作。 The boy leading the way, we had no trouble finding the strange cave. 由那个男孩带路,我们很容易就找到了那奇怪的洞。 The monitor being ill, we’d better put the meeting off. 班长病了,我们最好还是延期开会吧。 The river having risen in the night, the crossing was impossible. 夜里河水上涨,渡河不可能了。 There being no further business to discuss, we all went home. 没有别的事可讨论,我们都回家了。 独立主格用作条件状语

过去分词用法详解

过去分词的用法 一、构成:规则动词的过去分词是有动词原形+ed构成的,不规则动词则有各自构成。 二、基本特点:过去分词在句子中的基本用法有两点:1.与逻辑主语之间是被动关系 2.表示完成的动作 三、过去分词的用法: 1.作表语:过去分词作表语时,一般同时具备被动与完成的含义 例如:(1)The cup is broken.(2)He is retired. (3)After running,he is tired. 【注意】过去分词作表语时,已经变成形容词性质,主要表示主语的状态(被动完成),而被动语态则表示动作. 例如:(1) The cup was broken by my little sister yesterday. 茶杯是昨天我小妹打碎的.(是被动语态,表示动作) (2)The cup is now broken. 茶杯碎了.(过去分词作表语,表示状态) 【注意】有些动词如 interest, bore, worry, surprise, frighten 等通常用其过去分词形式来修饰人,表示“感到……” 用 -ing 形式来修饰物,表示“令人……” 例如:The book is interesting and I'm interested in it. 这本书很有趣,我对它很感兴趣. 2.做定语 作定语用的过去分词其逻辑主语就是它所修饰的名词.及物动词的过去分词作定语,既表被动又表完成;不及物动词的过去分词作定语,只表完成.

1)单一过去分词作定语,常置于其所修饰的名词之前,称作前置定语。 例如:We must adapt our thinking to the changed conditions. 我们必须使我们的思想适应改变了的情况. 2)过去分词短语用作定语时,一般置于其所修饰的名词之后,相当于一个定语从句,称作后置定语。 例如:The concert given by their friends was a success.他们朋友举行的音乐会大为成功. 3)过去分词短语有时也可用作非限制性定语,前后常有逗号. 例如:The meeting, attended by over five thousand people, welcomed the great hero. 4)用来修饰人的过去分词有时可以修饰与人有关的表情,面貌,举止行为以及感觉等,这时不能用v-ing形式 例如:The boy looked up with a pleased expression. His satisfied look showed that he had passed this exam. 3.作状语 作状语的过去分词在句子中多表示被动和完成两重含义。 1)时间状语:A.当和谓语动词动作同时发生时,一般仅表示被动,可以用when从句代替。 例如:Faced with difficulties,we shouldn’t withdraw for any excuse. B.当表示动作发生在谓语动词之前时,通常既表被动又表完成,可用after从句代替,也可用现在分词的被动完成形式代替。 例如:Caught by the police,the thief lay on the ground,crying and shouting.

独立主格结构常见类型及其用法.

独立主格结构常见类型及其用法 袁征 独立主格结构是由一个相当于主语的名词或代词加上非谓语动词、形容词(副)词、或介词短语构成的一种独立成分。该结构不是句子,也不是从句,所以它内部的动词不能考虑其时态、人称和数的变化,它与其主句之间既不能通过并列连词连接也不能有从句引导词引导,常用逗号与其主句隔开。独立主格结构在很多情况下可以转化为相应的状语从句或其他状语形式,但很多时候不能转化为分词形式,因为它内部动词的逻辑主语与主句主语不一致。在做这类题目时一定要小心判断,不能粗心大意。 一、独立主格结构的构成形式 1、逻辑主语+V-ing 这种构成形式内部的逻辑主语是分词的动作执行者,分词表示的动作不是整 句主语发出的动作,而是其逻辑主语发出的动作。如: 1.__________no bus, we had to walk home. A.There being B.Being C.Having been D.There was 2._______no bus, we had to walk home. A.As there being B.As there was C.Being D.There was 3._______Sunday, the library doesn't open. A.Being B.There being C.It being D.Having been 4.______Sunday, the library doesn't open. A.As it being B.Being C.It is D.As it is 2、逻辑主语+V-ed 该构成形式内部的逻辑主语是分词的动作承受者。如: 1._________, the train started. A.The signal given B.Giving the signal B.The signal being given D.The signal giving 2.__________, the train started. A.After having given the signal B.After the signal given C.Giving the signal D.After the signal was given 3._________, the text became easier for us to learn. A.Explaining new words B.New words explained C.Being explained new words D.Having explained new words 4.______________, the text became easier for us to learn. A. When new words were explained B.Explaining new words B.New words explaining D.Being explained new words 3、逻辑主语+形容词(副词) 该结构相当于一个未带动词的“主—系—表”结构。如: 1.___________, the patient can leave the hospital. A.Better conditions B.Conditions better C.Conditions are better D.Being better conditions 2._________, the patient can leave the hospital. A.If better conditions B.If conditions better C.If conditions are better D.Being better conditions 3.________, we’d like to go outing. A.Being Sunday B.Sunday OK C.Sunday is OK D.If Sunday OK 4.___________, we’d like to go outing. A.If Sunday is OK B.Sunday being OK C.Sunday OK D.A,B and C 5._________, you can wait a while.

初中英语现在分词用法总结

初中英语现在分词用法总结 一、基础知识: 现在分词(也叫动名词):表示主动和进行。 基本形式:doing 否定式:not doing 被动式:being done 完成式:having done 二、具体用法: 1.动名词作主语和宾语: (1)把一个动词变成-ing形式可以当做名词来用,表示一种经常性、习惯性的动作,可在句中充当主语和宾语。 eg: Working with you is a pleasure. I like reading in my free time. (2)可以用it做形式主语或形式宾语放在前面,再用动名词做真正的主语或宾语放在后面,这种用法常用于以下句式: ① It is/was no use/good doing sth. 做某事是没用的/没有好处的。 eg: It’s no use begging for his mercy. It’s no good smoking too much. ② It is/was a waster of time doing sth. 做某事是浪费时间的。eg: It is a waste of time copying others’ homework. ③ It is/was worth doing sth. 做某事是值得的。 eg: It was worth making the effort. ④ There is/was no sense in doing sth. 做某事是没有道理的/

意义的。 eg: There is no sense in arguing with your wife. ⑤ There is/was no point (in) doing sth. 做某事是没用的/ 无意义的。 eg: There is no point in getting angry. ⑥ There is no shame in doing sth. 做某事是不丢脸的。 eg: There is no shame in saying sorry to your friends. ⑦ There is no telling…无法预言会… eg: There is no telling what will happen. ※注意:动名词作主语时,其前可用名词所有格和形容词性物主代词修饰,即one’s doing sth.作主语。 eg: Tom’s being late again made his teacher angry. My going to Beijing University is my parents’ biggest dream. (3)动名词作宾语分为两种情况:动名词后的宾语和介词后的宾语 ①有些动词后只能接动名词作宾语,常见的有: avoid, advise, allow, admit, appreciate, consider, deny, enjoy, keep, finish, suggest, dislike, delay, risk, escape, imagine, mind, miss, permit, practice, fancy, can’t help, be busy, give up, can’t stand, feel like等。 eg: You must avoid being hurt when crossing the road. ②有些动词后即可接动名词也可接不定式作宾语,常见的有:

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