could have done 用法详解

could have done 用法详解
could have done 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 cou ld 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》◆

(完整版)wouldshouldcouldhavedone用法和区别

would/could/might/should have done等 用法和区别 一、在虚拟语气中的用法(情态动词都是过去时态!) 1. should have done:原本应该做某事,(否)shouldn't have done :原本不该做某事 2. ought to have done 原本应该做某事,(否) oughtn't to have done :原本不该做某事 注意: ought to do 语气更强,常用于长辈对小辈的用语或某规则上的要求(严格的规则应用must ). should do 可用语平辈朋友间,较为客气与口语化 3. need have done 原有必要做某事 (否) needn't have done 原本没必要做某事 注意:做情态动词,need的过去式仍然是need;做实意动词,need 的过去式是needed. 4.could have done 原本能够做某事 注意: couldn't have done 无虚拟语气的用法,只表推测,相当于 can't have done:过去不可能做了某事 5.might have done 原本可以做某事 注意: might not have done 无虚拟语气的用法,只表推测,相当于 may not have done:过去可能没有做某事

6.would have done原本会做某事 1. I would have told you all about the boy's story, but you didn't ask me. 二、对过去事情表推测的用法(情态动词用原型或过去式都可以,只是在说话者看来,可能性大小稍微有所不同而已) 1. must have done:过去肯定做了某事。不存在 mustn't have done 的形式。其否定或疑问形式须用 can(could)have done:“不可能做过某事”来表示: Since the road is wet, it must have rained last night. 既然路是湿的,那昨天晚上肯定下雨了。 He can't/couldn`t have missed the way. I drew him a map. 他不可能迷路。我(当时)给他画了张图。 “The dictionary has disappeared. Who could/can have taken it?”词典不见了,(过去)谁可能把它拿走了? 2. may / might have done may / might have done:过去可能做了某事,may 比 might 表示可能性稍大些。 may/might not have done过去可能没有做某事: I can't find my keys. I may / might have left them at the school yesterday. 我找不到我的钥匙了。我可能昨天把他们落在学校了。 John may/might not have passed the exam; he looks very sad. 约翰可能没有通过考试。他看起来很忧伤。

一般现在时的讲解及用法

亠般现在时的讲解及用法 、定义与讲解 1定义:一般现在时,表示经常性的事情,经常性的动作或一般性事实 2, 只有在第三人称单数用动词的三单变化”其他用动词的原形。 注:1)第一人称(I,we)第二人称(you)第三人称(He,She,they,it, 所有的名字名称)单数(一个人或事物)复数(两个或两个以上的人或事物)第三人称单数(第三方的单个的人或事物,除了 they) 2)三单变化 多数在动词(不是名词)后+ s eg: play — plays like — likes (1)直接在动词词尾加-s. ask---asks work---works get---gets stay---stays (2)以字母s, x, ch, sh 或o结尾的动词,在词尾直接加-es. watch---watches wish---wishes fix---fixes do---does go---goes pass-passes (3)以辅音字母加-y ”结尾的动词,要先变y为i再加-es.(辅音字母:除 a,e,i,o,u 这5个元音字母外的21个字母都是辅音字母; 元音字母力卩-y : stay--stays play--plays say--says buy--buys 辅音字母力卩-y:try---tries study-studies cry---cries fly---flies 二、一般现在时的用法 1, 经常性或习惯性的动作,常与表示频度的时间状语连用。 时间状语: every day, sometimes, at …,on Sun day,usually, once a week I leave home for school at 7 every morning. 2, 客观真理,客观存在,科学事实。 The earth goes around the sun. 3,表示格言或警句中。 Practice makes perfect. 熟能生巧。 注意:此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时。

such_as_的各种不同用法

一、such as 的七个用法 1. 表示举例,意为“例如,诸如此类的,像……那样的”,相当于like或for example。如: There are few poets such as Keats and Shelly. 像济慈和雪莱这样的诗人现在很少了。 Adverbs are used to modify verbs, such as “quickly” in “she ran fast”. 副词用来修饰动词,例如“她跑得快”中的“快”。 Animals such as rabbits and deer continue to be active all winter,finding food wherever they can . 像兔和鹿这样的动物整个冬天都是很活跃的,它们到处寻找食物。 用于此义时的几点说明: (1) 这类结构既可表现为“名词+such as+例子”,也可表现为“such+名词+as+例子”。如: I enjoy songs such as this one.= I enjoy such songs as this one. 我喜欢像这首歌一样的歌。 (2) 若后接动词,通常用动名词,有时也可用动词原形。如: Don’t do anything silly such as marry him. 不要做什么蠢事,比如说去嫁给他。 Magicians often perform tricks such as pulling a rabbit out of a hat. 魔术师常常变从帽子里抓出兔子的戏法。 (3) 不要按汉语意思将such as用作such like。 (4) 其后不可列出前面所提过的所有东西。如: 正:I know four languages, such as Japanese and English. 我懂四种语言,如日语、英语。 误:I know four languages, such as Chinese, French, Japanese and English. 我懂四种语言,如汉语、法语、日语和英语。 (5) 在现代英语中,such as可与etc. 连用。如: They planted many flowers, such as roses, sunflowers,etc. 他们种了许多种花,如玫瑰花、向日葵等。 They export a 1ot of fruits,such as oranges,lemons,etc. 他们出口许多水果,如桔子、柠檬等。 2. 表示“像……这样的”,其中的as 用作关系代词,引导定语从句,as 在定语从句中用作主语或宾语。此外,不要按汉语意思把该结构中的as 换成like。如: He is not such a fool as he looks. 他并不像他看起来那么傻。

could have done 用法

could have done 用法 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。

For-example与such-as的用法及区别

For example与such as的用法及区别 1)for example和such as都可当作“例如”解。但such as用来列举事 物,插在被列举事物与前面的名词之间。例如: The farm grows various kinds of crops, such as wheat, corn, cotton and rice. 这个农场种植各种各样的庄稼,例如麦子,玉米,棉花和稻米。 2)for example意为用来举例说明,有时可作为独立语,插在句中,不影 响句子其他部分的语法关系。例如: A lot of people here, for example, Mr John, would rather have coffee. 这儿的许多人,例如约翰先生,宁愿喝咖啡。 【注意】 (a)such as一般不宜与and so on连用。 (b)对前面的复数名词部分起列举作用,一般不全部列出。故不可以说: He knows four languages, such as Chinese, English, French and German. 应将such as改成namely, 后面加逗号。即:He knows four languages, namely, Chinese, English, French and German. 这两个短语都可以表米“例如”,但含义及用法不同。 l)for example强调“举例”说明,而且一般只举同类人或物中的一个作为插入语,且用逗号隔开,可置于句首、句中或句末。如: Many people here, for example, John, would rather have coffee.这里有许多人,例如约翰很喜欢喝咖啡。 There are many kinds of pollution, for example, noise is a kind of pollution.有许多种污染方式,例如噪音就是一种污染。 2)such as用来“罗列”同类人或物中的几个例子,可置于被列举的事物与前面的名词之间,但其后边不能用逗号。如: Many of the English programmes are well received, such as Follow Me, Follow Me to Science . 其中有许多英语节目,如《跟我学》《跟我学科学》,就很受欢迎。 English is spoken in many countries, such as Australia, Canada and so on.许多国家说英语,如澳大利亚加拿大 1

最新小升初英语语法零基础 can have done用法小结

小升初英语语法零基础:can have done用法小结 can have done can have done 通常只用于否定句和疑问句。用于否定句时表否定推断,推测肯定没做;用于疑问句时意为“难道真的做了吗”,表示怀疑。例如: Can he have done such a foolish thing? (= Is it possible …?) 他会做这样的傻事吗?(表怀疑) He can't have taken it home. 他不可能把它带回家了。(表不可能) could have done could have done 可用于肯定句、疑问句和否定句。用于肯定句既可以表示过去能够做而实际未做,有惋惜、遗憾或委婉批评之意,也可以表示对过去动作的推测;用于否定句和疑问句的情况与can have done 相同。例如: You could have done better, but you didn't try your best. 你本可以做得更好,但是你没有尽力而为。(表惋惜) This glass is cracked. Someone could have dropped it. 这个玻璃杯破了。可能是谁把它掉在地上了。(表推测过去) Could he have left the work unfinished?

他会丢下工作不干了?(表怀疑) He couldn't have checked out so early. 他不可能这么早就离开了。(表不可能) 注意:can't have done 的语气比 couldn't have done 要强一些。例如:He can't have been to that town. 他根本不可能去过那座城市。(语气略强) The measurement couldn't have been wrong. 测量不可能出错了吧。(语气稍弱)

不定式完成式to have done用法

情态动词+have done用法 1. Something may have happened to her. 她可能发生了什么事情。 She might have had an accident. 她或许遭受了意外. So she must have taken that too. 因此,她肯定把它也带走了。 1) 这三句话都用了“情态动词+不定式的完成时”,表示对发生过的事作某种猜测、推测。 (1) must have done 可用来对某件过去的事情作肯定推测,表示“一定已经,想必已经”做过某事,用于肯定的陈述句中。否定句中用can't have done。 She must have received the parcel, I sent it by registered post. 她一定已经收到包裹了,我是用挂号寄的。 (2) may have done, might have done, could have done “可能做过某事”,就语气而言could have done 所表的可能性更小些。 He may / might / could have left by nine. 他可能于九点前已离去。 (3) should have done / ought to have done表示“本该做某事”但实际未做。 I should / ought to have left London before nine but I didn't. 我本该在九点以前离开伦敦,但是我没有。 (4) shouldn't have done / oughtn't to have done 表示“本不该做事”,但实际上又做了。 He shouldn't / oughtn't to have left London before nine but he did. 他本不该在九点前离开伦敦,但是他离开了。 (5) can't / couldn't have done 表否定推测,“不可能做过某事”。 She can't / couldn't have gone to bed, for the light in her room is still on. 她不可能上床睡觉了,因为她房间的灯还亮着。 (6) could have done 可表示客观上“本来能做某事但实际上没做”。 He could have finished the work in time but he didn't work hard. 他本来可以按时干完活的,但他没有卖力。 (7) needn't have done 表示客观上“本不必做某事但实际上又做了”。 I needn't have gone to the office yesterday (but I went there). 昨天我没必要去办公室(但我却去了)。 (8) might have done 还可表示过去“本可能发生但实际上没有发生的动作”。用于表示说话人对已发生的事提出批评或意见。 He might have given more help, even though he was very busy. 即使他很忙,也可以多帮点忙。 情态动词+ 动词完成式即“情态动词+ 动词完成式即“情态动词+ have + done”,表示对过去行为或动作进行推测、评论或判断。这个结构是近几年高考情态动词的重点和难点。 一、在虚拟语气中的用法 1. should have done 表示“过去本应该做某事却未做。”其否定结构shouldn't have done 表示“过去本不该做某事却做了。” 2. ought to have done 表示“过去本应该做某事却未做。”其否定结构oughtn't to have done 表示“过去本不该做某事却做了。” 3. need have done 表示“过去本有必要做某事却未做。”其否定结构needn't have done 表示

一般现在时用法

般现在时讲解与练习 一般现在时基本用法介绍一般现在时的功能 1. 表示事物或人物的特征、状态。如:The sky is blue. 2. 表示经常性或习惯性的动作。 如如: I get up at six every day. 一般现在时的构成 1. be 动词:主语+be(am,is,are) +其它。如: I am a boy.我是一个男孩。 2. 行为动词:主语+行为动词+其它。如: We study En glish.我们学习英语。 【注】当主语为第三人称单数(he, she,it )时,要在动词后加"-s"或"-es"。如:Mary likes Chinese.玛丽喜欢汉语。 一般现在时的变化 1. be动词的变化。 否定句:主语be+not +其它。 如口:He is not a worker.他不是工人。 一般疑问句:Be+主语+其它。 如:-Are you a student? -Yes. I am. / No, I'm not.

非凡疑问句:疑问词+一般疑问句。如:Where is my bike? 2. 行为动词的变化。 ①否定句:主语+ do n't( does n't ) + 动词原形(其它)。如: I don't like bread. 当主语为第三人称单数时,要用does n't构成否定句。如: He does n't ofte n play. ②一般疑问句:Do( Does )+主语 +动词原形+ 其它。如: -Do you ofte n play football? -Yes, I do. / No, I don't. 当主语为第三人称单数时,要用does构成一般疑问句。 一般现在时态练习题 I. 写出下列动词的相应形式: 1. 第三人称单数: wash ________ match _______ guess _____ s tudy ______ finish ________ go ________ s now _____ carry _________ 一般现在时用法专练(A) □.按照要求改写句子。 1. Daniel watches TV every evening.(改为否定句) Daniel _________ ___________ T V every evening. 2. I do my homework every day .(改为一般疑问句并作否定回答)

have got的详细用法回顾.doc

Module 4 &5需要掌握的重点语法和词组: 复习:have的用法及否定句、一般疑问句的变法。 ①have的意思是:________,它的单数形式是:_______。have是_______词。 例如:我有许多好朋友。_____ _____ many good friends.他有许多好朋友。_____ _____ many good friends. ②把下列两道题改为否定句: 1、I have many good friends:_____________________________ 总结:have 的句子改为否定句要_______________________________________________________________ 2、He has a dog:_________________________ 总结:has的句子改为否定句要_____________________________________ 同样的道理:请将下列两道题改为一般疑问句: I have many good friends:_____________________________ 总结:______________________________________ He has a dog:_________________________ 总结:________________________________________________________ 练习: 一、用have的正确形式填空: 1、He_____two brothers. 2、I_____a beautiful picture. 3、Betty_____ a lovely dog. 4、They_____some friends here. 二、请将下列的句子改为否定句和一般疑问句。 1-3题改为否定句:1、He has two brothers. ___________________________________________________ 2、I have a beautiful picture. ___________________________________________________ 3、Betty has some friends here. ___________________________________________________ 4-6题改为一般疑问句: 4、They have a good teacher. _________________________________肯定回答:_________________ 5、I have some cards. __________________________________________否定回答:____________________ 6、Tony has a sister. __________________________________________否定回答:____________________ 三、请用所给词的适当形式填空。 1、I _________ (have)a brother,but I_________ (not have)a sister. 2、He _________ (have)a beautiful pen. _________ you_________(have)a pen? 3、Lingling _________ (have)an English dictionary. 4、_________ Tony_________(have)a car? have got 的用法及否定句、一般疑问句的变法。 ①have got 表示_________________________________ 例:我有一只猫。I have got a cat. have got 的第三人称单数形式是:____________________________ ②have got可以缩写为:_______________ 例如:I have got a cat = ________________________ has got 可以缩写为:_______________ 例如:He has got a cat = ________________________ 练习:请用has got或have got填空。 1、I a bike. 2、He a bike. 3、You a bike.

suchas引导定语从句的四种类型

such as引导定语从句的四种类型 such as引导定语从句的四种类型 一、用于such…as结构,其中的as为关系代词 He’s not such a fool as he looks. 他并不像看上去的那样愚蠢。(摘自牛津词典) I never heard such stories as he tells. 我从未听过他讲的这种故事。(摘自张 道真语法) He is not half such a fool as they thought. 他远非他们认为的那么傻。(摘自 新牛津) Such women as knew Tom thought he was charming. 那些认识汤姆的女人都认为他 很迷人。(摘自张道真语法) Britain is not enjoying such prosperity as it was in the mid-1980s. 英国现在已经不像 20 世纪 80 年代中期那么繁荣昌盛。(摘自柯林斯) 二、such as相当于those who Such as alter in a moment, win not credit in a month. 那些朝令夕改的人是不会获得人们长久信任的。(摘自新牛津) 此句相当于Those who alter in a moment, win not credit in a month. Associate with such as will improve your manners. 要和那些能提高你的礼貌修养的人交往。(摘自薄冰语法) 三、such as相当于what或whatever Such as remains after tax will be yours when I die. 我死以后全部财产除了交税以外都给你。(摘自牛津词典) 此句相当于: What remains after tax will be yours when I die. Whatever remains after tax will be yours when I die. Everything that remains after tax will be yours when I die.

一般现在时定义与讲解

2.不规则变化 be---- is are have----has 二、一般现在时的用法 表示经常性或习惯性的动作或存在的状态;表示客观事实或普遍真理;在时间、条件等状语从句中,用现在时表示将来;在某些以here,there开头的句子中,用一般现在时表示正在发生的动作 当主语是第三人称单数时: 1、动词变相应的第三人称单数形式 2、肯定句主语+动词s+其它

3、否定句主语+doesn't+动词原形+其它 4、一般疑问句Does+主语+动词原形+其它 5、肯定回答 Yes,主语+does 6、否定回答 No,主语+doesn't 7、特殊疑问句特殊疑问词+一般疑问句 当主语不是第三人称单数时: 1、肯定句主语+动词原形+其它 2、否定句主语+don't+动词原形+其它 3、一般疑问句 Do+主语+动词原形+其它 4、要注意,句式结构错则全都错。 5、谓语动词的形式:do/does 三、一般现在时的结构

一般现在时,是一种语法形式。表示通常性、规律性、习惯性、真理性的状态或者动作有时间规律发生的事件的一种时间状态。而今天我们就来说说英语学习中一般现在时中含有实义动词的一般现在时如何变成否定句呢,不清楚的同学赶紧来看看:今天小编给大家介绍的一般现在时中含有实义动词的句子,在变否定句前要分两种情况: 第一种:如果主语是第三人称单数时,要在实义动词前加doesn't,后面的动词用原形。具体是怎样的呢,我们通过几个例句来了解下: doesn't eat an apple. 他不吃苹果 doesn't do his homework.吉姆没有做作业 doesn't go to school.小王没去学校 第二种:如果主语不是第三人称单数时,只需在实义动词前加don't.具体是怎样的呢,我们通过几个例句来了解下: don't teach English.我不教英语 don't go to school.他们没有去学校 don't sing a song. 我们没有唱歌 好了,通过以上的几个例句,大家是否了解了含有be动词的一般现在时变成否定句的情况呢? 那么,接下来我们做几道题测试下你掌握得如何?! 将下列句子改成否定句; 1. I like Jinan. go to school on Sunday.

suchas的七个用法

such as 的七个用法 1. 表示举例,意为“例如,诸如此类的,像……那样的”,相当于like或for example。如: There are few poets such as Keats and Shelly. 像济慈和雪莱这样的诗人现在很少了。 Adverbs are used to modify verbs, such as “quickly”in “she ran fast”. 副词用来修饰动词,例如“她跑得快”中的“快”。 Animals such as rabbits and deer continue to be active all winter,finding food wherever they can . 像兔和鹿这样的动物整个冬天都是很活跃的,它们到处寻找食物。 用于此义时的几点说明: (1) 这类结构既可表现为“名词+such as+例子”,也可表现为“such+名词+as+例子”。如: I enjoy songs such as this one.= I enjoy such songs as this one. 我喜欢像这首歌一样的歌。 (2) 若后接动词,通常用动名词,有时也可用动词原形。如: Don’t do anything silly such as marry him. 不要做什么蠢事,比如说去嫁给他。 Magicians often perform tricks such as pulling a rabbit out of a hat. 魔术师常常变从帽子里抓出兔子的戏法。 (3) 不要按汉语意思将such as用作such like。 (4) 其后不可列出前面所提过的所有东西。如: 正:I know four languages, such as Japanese and English. 我懂四种语言,如日语、英语。 误:I know four languages, such as Chinese, French, Japanese and English. 我懂四种语言,如汉语、法语、日语和英语。 (5) 在现代英语中,such as可与etc. 连用。如: They planted many flowers, such as roses, sunflowers,etc. 他们种了许多种花,如

have_got的详细用法教学内容

h a v e_g o t的详细用 法

复习:have的用法及否定句、一般疑问句的变法。 ①have的意思是:________,它的单数形式是:_______。have是_______词。 例如:我有许多好朋友。_____ _____ many good friends.他有许多好朋友。_____ _____ many good friends. ②把下列两道题改为否定句: 1、I have many good friends:_____________________________ 总结:have 的句子改为否定句要 _______________________________________________________________ 2、He has a dog:_________________________ 总结:has的句子改为否定句要 _____________________________________ 同样的道理:请将下列两道题改为一般疑问句: I have many good friends:_____________________________ 总结: ______________________________________ He has a dog:_________________________ 总结: ________________________________________________________ 练习: 一、用have的正确形式填空: 1、He_____two brothers. 2、I_____a beautiful picture. 3、Betty_____ a lovely dog. 4、They_____some friends here. 二、请将下列的句子改为否定句和一般疑问句。 1-3题改为否定句:1、He has two brothers. ___________________________________________________ 2、I have a beautiful picture. ___________________________________________________ 3、Betty has some friends here. ___________________________________________________ 4-6题改为一般疑问句: 4、They have a good teacher. _________________________________肯定回答:_________________ 5、I have some cards. __________________________________________否定回答: ____________________ 6、Tony has a sister. __________________________________________否定回答: ____________________ 三、请用所给词的适当形式填空。 1、I _________ (have)a brother,but I_________ (not have)a sister. 2、He _________ (have)a beautiful pen. _________ you_________(have)a pen? 3、Lingling _________ (have)an English dictionary. 4、_________ Tony_________(have)a car? have got 的用法及否定句、一般疑问句的变法。

“could +have+过去分词”的10种用法

“could +have+过去分词”的10种用法 一、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: We could not have heard them because of the noise from the river. 由于有河水声我们不能听见他们的话。 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。 【说明】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。 二、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、本来能够”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。 We could have got in for nothing—nobody was collecting tickets. 我们本可以不买票就进去—根本没人收票。 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。 有时用于反语中。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。 三、表示未曾实现的可能性 即表示过去本来可能发生的情况,而实际上没有发生,通常译为“本来可以、本来可能”

一般现在时的基本用法及练习资料讲解

一般现在时的基本用 法及练习

一般现在时的用法 一般现在时表示人、事、物现在的状况和特点或表示经常性、习惯性的动作,句中常有always、often、usually等时间状语。现在时还可用于表达格言、科学事实、客观真理和至今不变的客观事实。 注意: 主语是任何一个单数名词或者是第三人称单数,谓语动词要进行必要的变化。特别提一点:不可数名词也算作单数处理。 动词第三人称单数的变化规则及发音规律 动词原形变第三人称单数的规则与发音规律同名词单数变复数大致相同,请认真观察。 1、大多数动词在词尾加“S”,在清辅音后发音为[s],在浊辅音及元音后发音为[z]。 如:stop-stops [s] make-makes [s] read-reads [z] play-plays [z] 2、以辅音字母加“y”结尾的,要先将“y”变为“i”,然后在加“es”读[iz] 如:fly-flies [z]; carry-carries [z] study-studies [z]; worry-worries 3、以“s, x, ch, sh”结尾的,在词尾加“e s”,发音为[iz] 如: teach-teaches [iz]; watch-watches [iz] 4、以“o”结尾的动词,加“es”,读[z] 如:go-goes [z] do-does [z] 句型 I.疑问

1.对于谓语动词或助动词是 be、have、can/may/must 等,将这些词移到主语前面。 Are you students?Yes, we are. / No, we aren't.你们是一名学生吗?是的。我们是一名学生。/不,我们不是。 Is Jane in the classroom? Yes, she is. / No, she isn't.简在这个教室里面吗?是的,她在。/不,她不在。 Does the house have two rooms? Yes, it does / No, it doesn't.这栋房子里面有两个房间吗?是的/不,不是。 Is there any water in the glass? Yes, there is. / No, there isn't.杯子里面有水吗?是的,有。/不,没有。 Can you swim? Yes, I can. / No, I can't.你会游泳吗?是的,我会。/不,我不会。 2.谓语动词是实义动词,方法是在主语前加助动词do或does构成,句中动词要改用原型动词。do用于第一人称和名词复数,does用于第三人称单数和名词单数或不可数名词。 Do you know it?Yes, I do. / No, I don't.你知道这个吗?是的,我知道/不,我不知道。Does she have a pen?Yes, she does. / No, she doesn't.[have 这里是实义动词]她有一个钢笔吗? Do they play basketball after school? Yes, they do. / No, they don't.他们放学后打篮球吗?II. 否定 1. 对于谓语动词或助动词是 be、have、can/may/must 等,后面直接加not。 I am not at college.我不在上大学。 Mr. Wang isn't 50 years old.王先生不是50岁。 The Jacksons have not two sons.贾克森没有两个儿子。 You may not go now.你现在不可能去了。

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