第三条件状语从句
初中英语条件状语从句知识点总结
初中英语条件状语从句知识点总结
条件状语从句是英语中常见的一种从句类型，用来表示一个条件或假设。
以下是初中英语中关于条件状语从句的知识点总结：
1. 引导条件状语从句的连词有：if，unless，as long as，
provided/providing (that)，suppose/supposing (that)，on
condition that等等。
2.当主句的谓语动词是一般将来时，条件状语从句可以使用一般现在
时表示将来情况。
3.如果条件状语从句前面有逗号，通常表示条件状语从句位于句首，
这时主句与条件状语从句之间可以互换位置。
4. 有些情况下，条件状语从句可以省略if。
例如：
- 在含有情态动词的主句中，后面的条件状语从句可以省略if，如：You can go if you want. (可以省略if)
- 在含有was/were to或had的主句中，后面的条件状语从句可以省
略if，如：If I were you, I would study harder. (可以省略if)
5. 当条件状语从句的主语与主句的主语一致时，可将条件状语从句
转化为省略式，如：If it rains, we will stay at home. (如果下雨，
我们将呆在家里)可以转化为：Raining, we will stay at home. (下雨
的话，我们将呆在家里)
需要注意的是，以上总结的知识点并不是绝对适用于所有情况，具体
用法还要根据上下文语境来确定。
在学习中，可以通过大量的阅读和练习
来加深对条件状语从句的理解和运用。
条件状语从句的四种类型解析
条件状语从句的四种类型解析条件状语从句是英语语法中常见的一种从句类型，用于表示一个条件或假设。
它可以通过四种不同的方式来表达，在文章中起着重要的作用。
本文将对这四种类型进行详细解析。
第一种类型：真实条件状语从句真实条件状语从句用来表示一个可能发生的条件和其结果。
它的结构是“if + 陈述句，陈述句”。
该类型的状语从句使用的是一种常见、普遍的条件句结构。
例如：If it rains, we will stay at home.（如果下雨，我们会呆在家里。
）If I have time, I will go to the library.（如果我有时间，我会去图书馆。
）这种类型的状语从句所表达的条件通常是可能实现的，所以它与现实情况相符。
第二种类型：虚拟条件状语从句虚拟条件状语从句用来表示一个假设性的条件和其结果。
它的结构是“if + 过去式，would/could/might + 动词原形”。
该类型的状语从句常用于表达不太可能实现的条件。
例如：If I were rich, I would travel around the world.（如果我富有，我会周游世界。
）If he had studied harder, he could have passed the exam.（如果他努力学习，他本可以通过考试。
）在这种类型的状语从句中，主句通常包含一个虚拟语气的动词，表示对现实情况的一种想象或假设。
第三种类型：反过来的条件状语从句反过来的条件状语从句用来表示一个反向的条件和其结果。
它的结构是“had/should + 陈述句，would/could/might + 动词原形”。
该类型的状语从句常用于反向的条件假设。
例如：Had it not been for your help, I would have failed.（如果不是你的帮助，我就会失败。
）Should you need any assistance, feel free to contact me.（如果你需要任何帮助，随时联系我。
考研英语技巧之条件状语从句
考研英语技巧之条件状语从句考研英语技巧之条件状语从句导语：《2016考研英语语法之条件状语从句（一）》里介绍了引导条件状语从句的几个引导词，并且通过中文例子让大家真正理解了条件状语这一从句。
今天作者就考研英语真题中的条件状语从句给大家进行讲解，希望大家对条件状语从句有个更深刻的认识。
句子一：In fact, circumstances seem to be designed to bring out the best in us and if we feel that we have been "wronged"then we are unlikely to begin a conscious effort to escape from our situation.这句话中and连接了两个并列句;并列句一中主语是circumstances，谓语是seem to be designed,被动语态，to bring out the best in us，不定式短语做目的状语;并列句二中有if 引导的条件状语从句--we feel that we have been"wronged"用一般现在时态，主句也为一般现在时态--we are unlikely to begin a conscious effort to escape from our situation。
参考翻译：事实上，环境似乎激发出了我们最好的自己;如果我们感觉自己受到了委屈，那我们就不太可能去有意识地努力逃脱我们所处的情景。
句子二：But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves--goals that pose a real challenge.If引导条件状语从句--if robots are to reach the next stage of laborsaving utility，使用一般现在时，主语是robots，谓语是are to reach,宾语是the next stage，后边的of介词短语做定语修饰宾语;主句使用一般将来时态，主语是they，代指robots，谓语是will have to operate with和并列谓语be able to make,宾语是less human supervison和并列宾语at least a few decisions，goals that pose a real challenge是整个句子的同位语。
第三条件状语从句
( ). 选择 答 : D 1. If you _____ home last night, you would have watched the exciting football match. A. stayed B. was staying C. would stay D. had stayed A 2. If you ______ so careless, you wouldn't have broken the laptop computer. hadn't been B. weren't C. isn't D. wouldn't be C 3. ______ you helped me, I wouldn't have made so much progress in my work. Didn't B. Wouldn't C. Hadn't D. Couldn't
( _____________ (listen) to me, you had listened would not have made ____________________ (not make) that mistake. hadn't climbed 2. If the boy _______________ (not climb) the tree wouldn't have broken yesterday, he _________________ (not break) his leg. had come 3. If you __________ (come) to the class in time this wouldn't have been morning, the teacher __________ (not be ) so angry. 4. If we _________ (meet) each other the other day, I had met would have had heart-to________________ (have) a heart-to-heart talk with you. had been 5. If you ___________ (be) there yesterday, you would have seen ________________(see) the famous movie star.
M3 语法 条件和让步状语从句
No matter what happened, he would not mind. = Whatever happened, he would not mind. 无论发生了什么 , 他都不会介意的。 ________________________________ No matter who you are, you must keep the law. = Whoever you are, you must keep the law. ________________________________ 不管你是谁, 你都要遵纪守法。
7.Supposing it rains, shall we continue the sports meeting?
倘若下雨,我们的运动会还要继续举行吗? ——————————————————— 8.I can tell you the truth on condition that you promise to keep a secret. 我可以告诉你真相,条件是你答应保密。 ——————————————————— 9.Call me when you have finished. 倘若你工作结束了就给我打电话。 ———————————————————
无论你是否相信,这都是真的。 Whether you believe it or not, it’ s true. ________________________________
(5) “no matter + 疑问词”或“疑问词ever”的含义为“……都……; 不 管……都……”，它们引导的让步状 语从句可以互换。
(2) as, though表示“虽然……但是”, “纵使……”之意。 as引导的让步状语从句必须以部分 倒装的形式出现, 被倒装的部分可以 是表语、状语或动词原形, though有 时也用于这样的结构中, 但although 不可以倒装。
英语条件状语从句的用法总结
条件状语从句的用法总结条件状语从句就是在复合句中表示主句动作发生条件的状语从句。
引导条件状语从句最经常用的连词是if，它的意思是“如果”；除此之外，还有unless (=if…not如果不……，除非), as/so long as(只要), while(=as long as只要), supposing (that)/provided /providing (that)(假如), in case(假使), on condition that(在……的条件下)等。
它们也多少含有“如果”的意思，也可用于引导条件状语从句。
1. 用if引导：if意为“如果”。
如：You can’t take photographs if the light is bad. 光线不足，就无法拍照。
If you cheat in the exam you’ll never get away with it. 考试作弊必予追究。
2. 用unless引导：unless的意思是“如果不”“除非”。
如：Don’t act unless you’re certain. 没有把握就不要做。
Unless you go at once you will be late. 如果你不马上走，就会迟到的。
3. 用as [so] long as引导：as [so] long as的意思是“如果”“只要”。
如：I’ll remember that day as long as I live. 只要我活着，我就不会忘记那个日子。
You may take my dictionary as long as you don’t keep it too long. 只要使用时间不太长，你可以把我的词典拿去。
4. 用in case引导：in case用连词引导条件状语从句时，其意为“如果”“万一”。
如：In case I’m late, start without me. 万一我迟到，就不等我了。
第三条件句用法及结构
第三条件句用法及结构
条件句是英语中一种重要的语法结构，用于表达假设、条件或可能性。
其中，
第三条件句（Third Conditional）是一种特殊的条件句结构，用来表达对过去事实
的虚拟假设。
第三条件句的结构是：
如果过去完成时（had + 过去分词），过去完成时（had + 过去分词）+ 主语 + would + have + 过去分词。
例如：
如果我知道你的生日，我会给你送礼物。
If I had known your birthday, I would have given you a present.
这个句子中，第一个条件（过去完成时）表达了过去某个时间发生的假设情况，第二个条件（过去完成时 + would）表达了对这个假设情况的虚拟结果。
第三条件句通常用于讨论过去某个事件或情况，表达对这个事件或情况的不可
能或未实现的虚拟结果。
更多例句：
如果你早点告诉我，我就能帮助你了。
If you had told me earlier, I could have helped you.
如果我们赢得了比赛，我们将会晋级。
If we had won the game, we would have advanced.
需要注意的是，第三条件句中的谓语动词都使用过去完成时形式，而与真实情况相反的假设使用了would have的结构。
这种结构可以用于表达对已经发生的事实进行的虚拟假设。
通过学习和理解第三条件句的用法和结构，我们能够更准确地表达对过去事实的虚拟假设，丰富我们的语言表达能力。
中考英语语法：条件状语从句考点分析
初中英语语法：条件状语从句考点分析条件状语从句的概念简述在复合句中，由从句表示的状语叫做状语从句。
由连接词if或unless引导的状语从句叫做条件状语从句。
在复合句中，由从句表示的状语叫做状语从句。
它可以用来修饰主语中的动词.形容词.副词等。
根据它表达的意思，状语从句可以分为时间状语从句，地点状语从句，条件状语从句，比较状语从句，目的状语从句，结果状语从句和让步状语从句等。
由连接词if或unless 引导的状语从句叫做条件状语从句。
（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在时[主将从现原则])条件状语从句的语法：e.g. If you're not satisfied with the life you're living, don't just complain. Do something about it. 对于现况的不满，不能只是抱怨，要有勇气作出改变。
If you're lonely when you're alone, you're in bad company.--Jean Paul Sartre 如果你独处时感到寂寞，说明没有把自己陪好。
条件状语从句就是用以表示“在某种条件下,会……”常用 if ,in case , on condition等词来引导连接词主要有if, unless, as/so long as, on condition that,provided,suppose,supposing 等。
.主句用一般将来时，if或unless引导的条件状语从句用一般现在时。
固定搭配：unless = if...not.e.g. Let's go out for a walk unless you are too tired.If you are not too tired, let's go out for a walk.if 引导的条件句有真实条件句和非真实条件句两种:真实条件句，叙述真实可能发生的事情，例如：They get angry if they think they are being treated disrespectfully. 他们要是觉得受到了怠慢，就会大动肝火。
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*注意:3. 主句或从句中的谓语动词构成否定式的时候, 应分别在主句中的would的后面或if从句中的had 的 后面加上not. had not done would not have done If sb. + _____________ , sb. ___________ ___________ + third form of the verb. 如果昨天晚上没有去看电影的话,你就完成了那份报告了。 If you had not gone to the cinema last night, you would have finished the report. 如果你告诉过我, 我就不会浪费那么多时间。 If you had told me that, I would not have wasted so much time. *注意:4. if 有时可以省略,但if后面部分需改为倒装句语序. Had you told me that, I would not have wasted so much time.
(二). 选择正确的答案: D 1. If you _____ home last night, you would have watched the exciting football match. A. stayed B. was staying C. would stay D. had stayed A 2. If you ______ so careless, you wouldn’t have broken the laptop computer. • hadn’t been B. weren’t C. isn’t D. wouldn’t be C 3. ______ you helped me, I wouldn’t have made so much progress in my work. • Didn’t B. Wouldn’t C. Hadn’t D. Couldn’t
through college exam, he _________________ no would have had
chance of getting a degree.
2. If a person had worked for a company for over 20 ___________
years, he would have stayed there until retirement. _________________
3. In the past if I had wanted to see my grandchildren, _________________
would have had to visit I _______________________ them in person.
4. If we _________ (meet) each other the other day, I had met would have had ________________ (have) a heart-to-heart talk with
you. had been 5. If you ___________ (be) there yesterday, you would have seen ________________(see) the famous movie star.
3. It’s (about/high) time + that
did
should do
It’s high time that you went. 你该走了。 It’s high time that you should go.
我们该去 It’s time that we went to bed. 睡觉了。 It’s time that we should go to bed.
虚拟语气特殊句型： 现在： did（were） 1. wish/if only 过去： had done
未来： would do 1) I wish I were a bird.（现在）
2) I wish I 3) We wish our parents wouldn’t punish us. （将来）
(一)用所给动词的适当形式填空:
1. If you _____________ (listen) to me, you had listened would not have made ____________________ (not make) that mistake. hadn’t climbed 2. If the boy _______________ (not climb) the tree
gone out.
b) If the weather was good, we would go out.
9 Complete the Third Conditional sentences by
putting the verbs in brackets in the correct forms. hadn’t been 1. If the exam _____________ (not be) so difficult, I would have passed _____________________ (pass). had put on (put on) a tie, would have allowed 2. If he ___________ they _____________ (allow) him to enter the restaurant. 3. If he hadn’t apologized (not apologies), I ________________ wouldn’t have given _________________(not give) him a birthday present 4. If they hadn’t argued (not argue), they _____________ __________________ (spend) the weekend together. would have spent had not been 5. If he __________ (not be) sick, would have joined he ___________ (join) us for the tour. hadn’t rained 6. If it _____________ (rain), we would have gone (go ) ________________ to the beach.
8
Which of the conditional sentences is correct in each context?
1. A storm broke out and the boat sank.
a) √ If the storm hadn’t broken out, the boat wouldn’t
have sunk. b) If the storm had broken out, the boat would have sunk. 2. The weather was good so we went out.
a) If the weather hadn’t been good, we wouldn’t have √
wouldn’t have broken yesterday, he _________________ (not break) his leg. had come 3. If you __________ (come) to the class in time this wouldn’t have been morning, the teacher __________ (not be ) so angry.
8
Look at the sentence from the interview and answer the questions.
If I had wanted to see my grandchildren, I would have had to visit them in person.
a)What time is Grandma Chen talking about: past, present or future? past b) What happened: Did she travel to see them? No! The pattern of the Third Conditional. would have done If sb. + had done , sb. ________ ___________ + third _________ form of the verb. could might
虚拟语气从句用在与过去事实相反的条件句中,条件句中 的谓语用had+过去分词,结果主句的谓语用would+have+ 过去分词: 如果我早点离开,我就赶上公共汽车了。 If I had left earlier, I would have caught the bus. should 如果我想起了那件事,我是会向母亲谈及的。 If I had thought of it, I would have talked to mother. should *注意:1. 不可将If从句中的谓语动词所用的形式误认为过 去完成时,它仅是虚拟语气的一种表达形式. 2. 在主句中, 若主语是第一人称,也可用should have+ 过去分词构成谓语.
Third conditional
与过去事实相反的虚拟条件句
7
Listen to the interview, then complete the conditional sentences below.