大学英语四六级考试语法精要
大学英语四六级考试语法精要(五)
partt-cet 2009年12月28日13:53 来源：考试大点击682次
虚拟语气
1. 表示现在/过去/将来情况的虚拟条件句
虚拟条件句主要有三种结构：
1)表示与现在情况相反：主句谓语用“would / could / might +动词原形”，从句谓语用“动词的一般过去时”（动词be的过去式一律用were）。
If I were you, I would not accept his offer.
If I had time, I would certainly go to the cinema with you.
2) 表示与过去情况相反：主句谓语用“would / could / might + have +过去分词”，从句谓语用过去完成时。
If I had got up a little earlier, I wouldn’t have missed the train.
If I had been more careful, I might have passed that exam.
3) 表示与将来情况相反：主句谓语用“would / could / might +动词原形”，从句谓语用“were +动词不定式”或“should +动词原形”。
If I were to do the job, I would not be able to have enough time to study.
If it should rain tomorrow, I would not go out with you.
2. 虚拟条件句连接词if的省略
如果虚拟条件句的从句中含有were, had, should, could等词时，可以省略连接词if，但这时必须把were, had, should, could等词移到主语前面，形成倒装。这种句型主要用于书面形式。
Were I to do the job, I would finish doing it within two weeks.
Had it not been for his help, we couldn’t have arrived there on time.
Should it rain tomorrow, I would stay at home.
3. wish后宾语从句中的谓语构成
动词wish后的宾语从句表示未实现的或不可能实现的愿望，其宾语从句中的谓语动词要用虚拟语气，有以下三种构成形式。
1) 表示现在不可能实现的愿望，宾语从句中的谓语动词用一般过去时。（be的过去式为were）。
I wish I had enough money to buy a car.
I wish I were as young and energetic as you.
2) 表示过去未能实现的愿望，宾语从句中的谓语动词用过去完成时（had +过去分词）或“would / could + have +过去分词”。
I wish I hadn’t made such a mistake.
I wish I could have done it better.
3) 表示将来不可能实现的愿望，宾语从句中的谓语动词用“would / should (could, might) +动词原形”。
I wish I would not get old.
I wish I could travel around the world one day.
4. 某些动词后的宾语从句中谓语动词要用虚拟语气
在一些动词后面的宾语从句中，谓语动词要用虚拟语气。这时，谓语动词用动词原形或should +动词原形。这类动词一般表示命令，要求，决定，建议，主张等概念，主要有：advise, ask, command, decide, demand, desire, direct, insist, move, order, propose, recommend, request, require, suggest,等。
The workers demanded that their wages (should) be raised by 10 per cent.
The teacher decided that you do the experiment first.
5. 某些名词后的表语从句和同位语从句中谓语动词要用虚拟语气
在一些名词后面的表语从句和同位语从句中，谓语动词要用虚拟语气。这时，谓语动词用动词原形或should +动词原形。这类名词一般表示命令，要求，决定，建议，主张等概念，主要有：advice, idea, instruction, motion, order, plan, proposal, recommendation, request, requirement, suggestion,等。
My suggestion is that we (should) send for a doctor immediately.
He gave the order that they (should) do the experiment again.
6. 错综时间条件句
条件从句表示的动作和主句表示的动作，有时发生的时间是不一致的.如从句是对过去情况的假设，而主句可能是对现在正在进行情况的假设。这种句子称为错综时间条件句.
If the weather had been more favourable, the crops would be growing still better.
7. 某些主语从句中的谓语动词要用虚拟语气
某些表示命令，要求，决定，建议，主张以及“重要性”和“紧迫性”等概念的主语从句中谓语动词要用虚拟语气。这时，谓语动词用动词原形或should +动词原形。这类主语从句一般由“It is (was) + 形容词／过去分词+ that引导的从句”构成。该结构中，常用的形容词主要有：advisable, appropriate, desirable, essential, imperative, important, necessary, obligatory, proper, urgent, vital等；常用的过去分词主要有：arranged, decided, demanded, desired, ordered, proposed, recommended, requested, suggested等。
It is necessary that you (should) stop smoking so heavily.
It is arranged that you (should) enter for this competition.
8. as if / though引起的从句
当as if / though引起的从句所表达的内容完全与实际情况相反或者纯粹是一种假设时，通常要用虚拟语气。如果从句表示与现在的事实相反，谓语动词用一般过去时；如果从句表示与过去的事实相反，谓语动词用过去完成时；如果从句表示与将来的事实相反，谓语动词用would (might, could) + 动词原形；
They talked as if they had been friends for years.
I remember the whole thing as if it happened yesterday.
It looks as if it might rain.
Note: 如果as if / though引起的从句所表达的内容被看作是事实或者有可能是真实的，则要用陈述语气。
It seems as if it is going to rain.
The meat tastes as if it has already gone bad.
9. lest, for fear that和in case引起的从句
当lest, for fear that和in case表示“以免，以防，生怕，惟恐”等时，在它们引起的从句中，谓语动词常用should + 动词原形。
He ran away lest he should be seen.
He’s working hard for fear that he should fall behind.
He left early in case he should miss the last train.
10. If only引出的从句
If only引出的从句用以表达感叹性的愿望，常译为“要是…就好了”。If only从句经常省略结果主句，且主要用在虚拟语气中，即从句的谓语动词用一般过去时表示现在或将来不可能实现的愿望，或用过去完成时表示过去没有实现的愿望。
If only the rain would stop.
If only I’d listened to my parents.
Note: if only引出的句子偶尔也可使用陈述语气，但考生须注意的是，在各类测试中一般都以用虚拟语气为正确答案。
11. would rather（that）引出的从句
would rather意为“宁愿”，接从句时常省略关系代词that。would rather后的从句要用虚拟语气，即从句谓语动词用一般过去时表示现在或将来的愿望，用过去完成时表示与过去事实相反的愿望。
I’d rather you told me the truth.
I would rather you came tomorrow than today.
I’d rather you hadn’t told me about it.
12. It is (about/high) time (that) 句型
该句型表示“（早）该做…”，其后的定语从句中的谓语动词要用虚拟语气表示。在测试中从句的谓语动词用一般过去时。
It is time that we went to bed.
It is high time that somebody taught you to behave yourself.
13. 表示猜测的几种不同的方法及意义
一些情态动词与动词的完成式连用能够表示对过去情况的猜测或者未实现的可能性。
1) could have + 过去分词
A. 表示对过去可能发生的事情的推测，意为，“可能做了某事”。
He couldn’t have seen her yesterday.
They could have lost their way.
B. 表示某事在过去本有可能发生，但事实上并未发生，意为，“本可以做某事”。
We could have started a little earlier.
I could have killed her. It was a narrow escape.
2) may (might) have + 过去分词
A. 表示对过去情况的推测，意为，“可能已做某事”。
He may have heard the news.
I might have come to a wrong conclusion.
B. 表示一种未实现的可能性，即本可以做某事，而实际上并没有做，有时含有抱怨的口吻。It was a narrow escape. You might have killed yourself.
A lot of men died who might have been saved.
3) must have + 过去分词
表示逻辑上的必然性，即按照某些现象推断过去肯定发生过的某事。
She must have made a big mistake.
The city at one time must have been prosperous, for it enjoyed a high level of civilization.
4) needn’t have + 过去分词
表示过去不必做某事，但已经做了，即本可不必做某事。
You needn’t have woken me up. I don’t have to go to work today.
He needn’t have watered the flowers, for it is going to rain.
5) should / ought to have + 过去分词
表示过去应该做某事而实际上没有做。
You should / ought to have done what your parents told you. (But you failed to do it.)
You should / ought to have been more careful. (But you weren’t.)
6) shouldn’t / oughtn’t to have + 过去分词
表示过去不应该做某事而实际上却做了。
You shouldn’t / oughtn’t to have crossed the road when the lights were red. (But you did.) They shouldn’t / oughtn’t to have left so soon. (But they did.)
7) would have + 过去分词
表示对现在或将来某时之前业已完成的动作的推测。可译为，“可能”、“也许”、“想必”。
He would have arrived by now.
She would have recovered by then.
转载自：大学英语四六级考试语法精要(五)_英语四级-英语六级-cet
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（1）由no matter + wh-疑问词【no matter what】和wh-疑问词+ever 【whatever】。但wh-疑问词+ever【whatever】引导的名词从句则不能用no matter替换。 Take the coat ，no matter what coat it is / whatever coat it is . （2）No matter whether…or…结构中可将no matter省略，形成whether…or…或whether…or not 引导选择条件句。 例；The substance does not dissolve in water whether {it is}heated or not。 2．条件状语从句 】 翻译条件状语从句时，要注意时态的选择。 例；Please come here at ten tomorrow morning if it is convenient for you。条件状语从句，用if引导；主句是祈使句，相当于将来时态，故从句应用一般现在时。 3. 时间状语从句 例；We do not know it until a doctor discovered it by chance。 4. 原因状语从句 常见引导原因状语从句的引导词有；because，as，now that/since， in that 等。 三．名词性从句 1. 主语从句 ） 汉语中的“的”字结构可译成英语的主语从句，用what引导，相当于the thing that。 例：What many people have not realized is that read books is a insteresting thing。 2. 表语从句 In my seventies，one change I notice is that I am more easily to get tired than before。
大学英语四六级核心语法
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第一章动词概述 一、谓语动词 1.英语时态 The first president of the US was George Washington, the second was John Adams, the third was Thomas Jefferson, and the sixteenth was Abraham Lincoln. Who is the president of the US? A.George Washington B.Abraham Lincoln C.Thomas Jefferson D.None of the above 某一时间某一动作所呈现的状态。 我们学英语。 我们学过英语。 我们在学英语。 我们将学英语。
一般进行完成完成进行 现在do/does is/am/are doing have/has done have/has been doing 过去did Was/were doing Had done Had been doing 将来will do Will be doing Will have done Will have been doing 过去将来0would study Would be doing Would have done Would have been doing 一般现在时
大学英语四级语法考点透析
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2015年6月英语四六级语法提高练习
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英语四级考试必备基础语法知识
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大学英语四级考试语法指导
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现在他在中国，他希望能懂得中文。(事实上并不懂) 6. When we begin the trip, they will wish they were with us.(will wish,过去虚拟动词were)(事实上并不和我们在一起) 二)、对过去情况的虚拟(和过去的事实相反)： 用wish表示对过去事情的遗憾。其句子结构为：宾语从句的谓语用过去完成时，或would, could, might+现在完成时。例： 1. I wish (that可省略，下同)I hadn't wasted so much time. 我后悔不该浪费这么多时间。(事实上已浪费了) 2. He wishes he hadn't lost the chance. 他真希望没有失去机会。(其实已失去) 3. We wished he had spoken to us. (wished，had + spoken)(事实上他并没同我们讲) 4. I wish you had called earlier. (wish, had + called)(事实上已迟了) 5. They will wish they had listened to us sooner. (will wish,had + listened)(事实上并不如此)
大学英语四六级考试语法精要
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大学英语四级常考语法总结
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六、倒装结构。分为全部倒装和部分倒装。那些否定词(组)、介词短语能引起倒装句，部分倒装和全部倒装有和区别，as在倒装结构中的用法及意义等等，都是考生应当重视的地方。 七、非谓语动词。①根据非谓语动词同其所修饰的名词或逻辑主语的一致关系，确定使用主动语态或被动语态，然后考虑采用现在分词、现在分词被动式或过去分词;②非谓语动词同主句谓语动词动作发生的先后关系。动作正在进行的用现在分词进行式，同时发生或不分先后发生的用现在现在分词一般式或过去分词;在主句谓语动词之前发生的用现在分词完成式、不定式完成式;发生在主句谓语动词之后的多用不定式一般式;③表状态多用分词，表目的多用不定式。
英语四六级考试8个六级英语常考语法重点
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②Onlythree states, with a bined population not much larger than that of Brooklyn…(16年6 月CET6,第一套) 只有在三个人口总数加起来不超过布鲁克林的州… ③Itsbenefits outweigh the hazards involved. (16年6 月CET6,第二套) 它的好处远超过了它所涉及的危害。 ④aretired member of the Public and Commercial Services Union (15年12月CET6,第三套) 一名公共及商业服务工会的退休成员 ⑤…thefoods served are so diverse that guests cannot eat up all the dishes. (15年6月CET6,第一套) 端上的饭菜丰富多样，让客人吃不完。 ⑥anastonishing number of exceptional colleges(15年6 月CET6,第二套)
大学生英语四六级语法
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(CET 6, 2014.12, Reading Comprehension, Section A) … we can reduce urbanization’s impact on the environment. (CET 6, 2014.12, Reading Comprehension, Section C, Passage 1) They are only limited by their curiosity and ambition. (CET 6, 2014.12, Reading Comprehension, Section C, Passage 2) Silicon Valley executives are being shamed into adding women to their boards. (CET 6, 2014.12, Reading Comprehension, Section C, Passage 2) The urbanization wave can’t be stopped… (CET 6, 2014.12, Reading Comprehension, Section C, Passage 1) 土豪和大妈可能会被收入新版牛津（Oxford）英语词典。 (CET 6, 2014.06, Translation) 2.主语的变化 Many students… have weak skills in mathematics. (CET 4, 2014.12, Reading Comprehension, Section A)
大学英语四级考试语法笔记83
洛基英语，中国在线英语教育领导品牌 ④在same和such之后，定语从句用as引导， 如：Let’s discuss only such questions as concern us. 让我们只讨论与我们有关的问题。 I’ve never heard such stories as he tells. 我从来没听说过他讲的这种故事。 I shall be surprised if he does this in the same way as I do. 如果他做这件事的方法和我一样，那就奇怪了。 She works in the same office as I do. 她和我在同一个办公室工作。 She wears the same kind of clothes as her sister does. 她姐妹俩穿同样的衣服。 He’s wearing the same dress as he wore at Mary’s wedding. 他穿着与他在Mary的婚礼上穿的一样的衣服。 This is the same watch as I have lost. 这块表和我丢的那块一样。 I’ve never seen such kind of people as they are. 我从来没见过像他们这样的人。 I’ve never seen such kind people as they are. 我从来没见过象他们这样厚道的人。 I want the same shirt as my friend’s. 我要一件跟我朋友一样的衬衫。 Such machines as are used in our workshop are made in china. 我们车间使用的这种机器是中国制造的。 但是，如果从句和主句的动作在将来不同的时间发生，则两部分都要用来将来时， 注：④在same和such之后，定语从句用as引导， 偶尔，the same 后面也用that， 如：He’s wearing the same suit that he wore at Mary’s wedding. 他穿着与他在Mary的婚礼上穿的一样的衣服。 She works in the same office that I do. 她和我在同一个办公室工作。 This is the same watch that I have lost. 这块表和我丢的那块一样。 as 引导非限定性定语从句即可放在主句之前，也可放在主句之后，用来修饰整个句子。当as在从句中作主语时，后面常接下列句型。如：as is known, as is said, as is reported as is announced 等。 例如：As we all know, Mr. Wang is a good teacher.