考研英语语法考点详解 连词辨析(because,since,as和for)
考研英语语法考点详解连词辨析（because,since,as和for）
because、since、as和for均可表示“原因”，其中because、since 和as均为从属连词，用于引导原因状语从句，而for为并列连词，用于连接并列句。
1.从属连词because强调直接原因，所指原因通常是听话人所不知道或最感兴趣的，语气最强，通常置于主句后，用于回答why引出的问题。because引导的原因状语从句往往比主句显得更重要。例如：
•I prefer classical music because it makes me feel relaxed.
我更喜欢古典音乐，因为它令我感到放松。
•It’s about the now and what one contributes to the now, because reading is a give and take between author and reader. 阅读是作者和读者之间的一种给予与索取，因此它与当下以及一个人对当下的贡献有关。
2.从属连词since语气较because弱，常表示已知的、显然的理由，常译为“既然”。since引导的从句通常置于主句之前，重点强调主句的内容，相当于now (that)。例如：
•Since you have repaired my TV set, there is no need for me to buy a new one. 既然你把我的电视机修好了，我就没有必要买新的了。
•We thought that, since we were in the area, we’d stop by and see them. 我们想，既然到了这个地方，就该顺便去看看他们。
3.从属连词as引导原因状语从句时，表示双方已知的事实或显而易见的原因，用法与since大致相同，但语气更弱，没有since正式。例如：
•I don’t enjoy watching TV with my brother as he always switches over to the programs that he wants to watch. 我不喜欢和我弟弟一起看电视，因为他总是切换到他想看的节目。•They have real impacts, as they result in misguided use of scarce resources. 它们产生了实际的影响，因为它们导致了稀缺资源被错误使用。
4.并列连词for表原因时，不表示第一个分句行为的直接原因，只是提供一些补充说明，且for连接的第二个分句不可置于第一个分句前。例如：
•Now I am proud to show visitors over the prison, for I helped to make our people free in their own land. 现在，我很自豪地领来访者参观监狱，因为我帮助我们的人民在自己的土地上获得了自由。
•Nowadays, there is a sharp increase in children’s creativity, for they are greatly encouraged to develop their talents. 如今，孩子们的创造力有了极大的提高，因为他们受到极大的鼓励去发展自己的才能。
so…that...中的so为副词，其后跟形容词或副词；而such...that...中的such为形容词，其后接名词(短语)，它们的结构分别为:
1.so+形容词/副词+that从句；例如：
I was so upset that I almost cried. 我难过得几乎哭了出来。
It was raining so hard that we couldn’t help wondering how long it would take to get there.雨下得太大了，以至于我们不禁想知道还要多久才能到达那里。
2.so+形容词+a/an+可数名词单数+that从句；例如：
He is so clever a boy that all his teachers like him. 他是一个很聪明的男孩，以至于所有的老师都喜欢他。
It is so interesting a film that we all want to see it again. 这是一部如此有趣的电影，以至于我们都想再看一遍。
3.such+a/an+形容词+可数名词单数+that从句；例如：
He came to such a sudden stop that we almost hit him. 他突然停下来，以至于我们差点儿撞到他。
A company showed a new voice technology able to produce such a convincing human-sounding voice that it was able to speak to a receptionist. 一家公司展示了一种新的语音技术，该技术能够产生令人信服的人声，从而可以与接待员通话。
4.such+形容词+可数名词复数/不可数名词+that从句；例如：
Slave ships carried slaves over from Africa, keeping them in such terrible conditions that many died during the long sea journey. 奴隶船把奴隶从非洲运过来，让他们处在非常恶劣的条件下，以致许多人在漫长的海上旅程中死去。
It was such loud music that we couldn’t hear ourselves speak. 音乐太吵了，以致我们听不见自己说话。
1.till与until用于引导时间状语从句，意为“直到……为止”。当主句为肯定句时，谓语动词须用延续性动词，表示主句的动作一直延续到till/until所表示的时间为止; 当主句为否定句时，谓语动词须用非延续性动词，表示主句的动作到till/until所表示的时间才发生。例如：
•Wait till you are old enough, dear. 等你长大了再说吧，亲爱的。
•I did not realize schools in the UK are so different from schools in China until I read your article. 直到我读了你的文章，我才意识到英国的学校和中国的学校有这么大的不同。
2.until可置于句首，而till通常置于句中。例如：
•Until we do that, nothing else will change! 如果我们不那样做，那么什么都不会改变!
•She continued working to help improve the lives of poor prisoners till she died. 直到去世，她一直致力于帮助改善贫困囚犯们的生活。
3.当主句为否定句时，until可与否定词not共同构成“not...until...”结构，且not until可用于强调句型中。例如：
•We don’t know how much we depend on them until we don’t have them. 直到失去他们，我们才知道我们有多依赖他们。•It was not until the early 1950s that most tape recorders began using plastic tape as they do today. 直到20世纪50年代早期，大多数录音机才像现在这样使用塑料磁带。
考研英语之语法练习题(含详细题释)
定语从句练习题 1. The settlers were unprepared for the long and patient toil ____ the soil would be made to yield crops. [A] by which alone [B] so that [C] because [D] though 2. Most electronic devices of this kind, ____manufactured for such purposes, are tightly packed. [A] that are [B] as are [C] which is [D] it is 3. The commentator must know the value of silence and how to use it at those moments ____ the pictures speak for themselves. [A] if [B] when [C] which [D] as 4. Children are likely to have less supervision at home ____ was common in the traditional family structure. [A] than [B] that [C] which [D] as 5. The Social Security Retirement Program is made up of two trust funds, ____ could go penniless by next year. [A] the larger one [B] the larger of which [C] the largest one [D] the largest of which 6. Living in the central Australian desert has its problems, ____ obtaining water is not the least. [A] of which [B] for what [C] as [D] whose 7. There ought to be less anxiety over the perceived risk of getting cancer than ____ in the public mind today. [A] exists [B] exist [C] existing [D] existed 8. The professor can hardly find sufficient grounds ____ his argument in favor of the new theory. [A] which to base on [B] on which to base [C] to base on which [D] which to be based on 9. ____ is generally accepted, economical growth is determined by the smooth development of production. [A] What [B] That [C] It [D] As 10. No one would have time to read or listen to an account of everything ____ going on in the world. [A] it is [B] as is [C] there is [D] what is 11. I’ve kept up a friendship with a girl whom I was at school ____ twenty years ago. [A] about [B] since [C] till [D] with 12. He studied hard at school when he was young, ____ contributes to his success in later life. [A] which [B] therefore [C] who [D] so that 13. The minister was the person ____. [A] in whose honor the state dinner was given [B] whom the state dinner was given in honor [C] for him the state dinner was given honor [D] whose honor the state dinner was given 14. This is an exciting area of study, and one ____ which new applications are being discovered almost daily. [A] from [B] by [C] in [D] through 15. ____ can be seen from the comparison of these figures, the principle involves the active participation of the
英语语法：because, since, as, for的用法的区别
英语语法：because, since, as, for的用法的区别because, since, as, for的用法区别 四者均可用来表示原因，区别如下： (1) 关于 because：语气，表示直接原因，可用于回答 why 提 出的问题、引导表语从句、用于强调句等，而其余三者均不行： “Why didn’t he come?” “Because he was ill.” “他为 什么没来?”“因为他病了。” My stomach hurts because I have eaten too many apples. 我肚子痛，因为苹果吃得太多。 That’s because you can’t appreciate music. 这是因为你 不能欣赏音乐。 It is because he is honest that I like him. 是因为他诚实 我才喜欢他。 (2) 关于 since 与 as： a. 两者所表示的原因都是人们已知的，即对已知事实提供理由，而不是表示直接原因。since 比 as 语气稍强，且比 as 略为正式， 它们引导的从句通常放在主句之前，有时也放在主句之后： As you weren’t there, I left a message. 因为你不在那儿，我留了个口信。 Since you are wrong, you should apologize. 你既然错了， 就应该道歉。 b. since 可用于省略句，而其他三者不行： Since so, I have nothing to say. 既然如此，我无话可说。
(3) 关于 for：是并列连词(其余三者为从属连词)，它有时可表示因果关系(通常要放在主句之后，且可与 because 换用);有时不表示因果关系，而是对前面分句内容的解释或推断(也要放在主句之后，但不能与because 换用)。比较： The ground is wet, for (=because) it rained last night. 地面是湿的，因为昨晚下过雨。 It must have rained last night, for the ground is wet this morning. 昨晚一定下过雨，你看今天早上地面是湿的。 (此句不能用 because 代 for)
because, due to, as, since与for的不同用法
because, due to, as, since与for的不同用法 一、相同之处：都表示“因为”，均为连词 二、区别： （1）because (因为）：表示直接的原因或理由，着重点在从句，从句是句子的主要部分用于回答why，回答why 提出的问题时，只能用because语气最强。He didn't go to school because he was ill. 他没去上学因为他病了 （2）since和as均表示人们已知的原因，无须加以说明的即成事实的理由，全句中心在主句。它所引导的从句常常放在句首。as是常用词，它表示的含义与since相同，但语气更弱，没有since正式， 常译为“由于，鉴于”。从句说明原因，主句说明结果，主从并重 As you ask, I will tell you. 你既然问我，我就告诉你。 As I am busy, I can’t go with you. 由于我比较忙，所以不能同你一起去。 Since you are wrong, you should apologize. 你既然错了，就应该道歉。 （3）for引导的表示原因的状语从句语气较because弱，类似一种补充说明，可有可无，一般不用它来回答why提出的问题。它引导的从句不能放在句首，而且前面一般用逗号与主句分开。 We can’ t go, for it’s raining. 由于天下雨，我们不能走了。 （4）now that（既然）的用法： now that同since相似，语气较弱，强调人们已知的事实。例： Now that you are busy, let me do it for you. 既然你忙，就让我给你做吧。 区别：since和now that，表示事物发展的自然结果，特别是当对方大概已经了解其原因的情况下使用，表示既成事实的原因一般位于主句之前。注意：for是并列连词，引出的原因较间接，似乎是事后所想到的补充解释的理由，只陈述一般推断的理由，不一定表示产生结果的必然原因，主要放在两个并列句之间。because通常表示直接的原因。 due to/owing to相当与because of后面要加名词或名词性短语due to 表语形容词。because 后面要家从句 due to the fact that 相当于because
考研英语语法考点详解 连词辨析(because,since,as和for)
考研英语语法考点详解连词辨析（because,since,as和for） because、since、as和for均可表示“原因”，其中because、since 和as均为从属连词，用于引导原因状语从句，而for为并列连词，用于连接并列句。 1.从属连词because强调直接原因，所指原因通常是听话人所不知道或最感兴趣的，语气最强，通常置于主句后，用于回答why引出的问题。because引导的原因状语从句往往比主句显得更重要。例如： •I prefer classical music because it makes me feel relaxed. 我更喜欢古典音乐，因为它令我感到放松。 •It’s about the now and what one contributes to the now, because reading is a give and take between author and reader. 阅读是作者和读者之间的一种给予与索取，因此它与当下以及一个人对当下的贡献有关。 2.从属连词since语气较because弱，常表示已知的、显然的理由，常译为“既然”。since引导的从句通常置于主句之前，重点强调主句的内容，相当于now (that)。例如：
•Since you have repaired my TV set, there is no need for me to buy a new one. 既然你把我的电视机修好了，我就没有必要买新的了。 •We thought that, since we were in the area, we’d stop by and see them. 我们想，既然到了这个地方，就该顺便去看看他们。 3.从属连词as引导原因状语从句时，表示双方已知的事实或显而易见的原因，用法与since大致相同，但语气更弱，没有since正式。例如： •I don’t enjoy watching TV with my brother as he always switches over to the programs that he wants to watch. 我不喜欢和我弟弟一起看电视，因为他总是切换到他想看的节目。•They have real impacts, as they result in misguided use of scarce resources. 它们产生了实际的影响，因为它们导致了稀缺资源被错误使用。 4.并列连词for表原因时，不表示第一个分句行为的直接原因，只是提供一些补充说明，且for连接的第二个分句不可置于第一个分句前。例如： •Now I am proud to show visitors over the prison, for I helped to make our people free in their own land. 现在，我很自豪地领来访者参观监狱，因为我帮助我们的人民在自己的土地上获得了自由。
【英语】英语语法连词归纳总结
【英语】英语语法连词归纳总结 一、单项选择连词 1．The result of the study indicated that it was the type of fat ______ made the difference．A．that B．what C．who D．as 【答案】A 【解析】此题考查强调句型，其结构为：it is/was+ 被强调的部分+ that,句意：研究结果表明就是脂肪的类型使得有所不同。所以选A。 2．I’m sorry I got caught in the traffic；_________, I could have been here sooner．A．besides B．although C．anyway D．otherwise 【答案】D 【解析】考查含蓄虚拟条件句。I could have been here sooner是和过去事实相反的虚拟语气，四个选项中只有otherwise可以充当含蓄虚拟条件，相当于if I had not got caught in the traffic.所以选D。 3．Life isn’t always beautiful, ________ the struggles make you stronger and the changes make you wiser. A．or B．so C．but D．for 【答案】C 【解析】 试题分析：考查连词。句意：生活不总是美丽的，但是困难使你更强壮，改变使你更明智。or或者，否则；so所以，因此；but但是；for因为。故选C。 考点：考查连词 4．Things don’t always go as planned, ________ I st ill stay positive. A．or B．as C．but D．for 【答案】C 【解析】 试题分析：考查并列连词。句意：事情并不总是按着计划进行，但是我仍然保持积极。故选C。 考点：考查并列连词 5．Don’t give up regardless of difficulty and failure, ________ you’ll never achieve your goals. A．and B．but C．or D．so 【答案】C 【解析】 【详解】
英语连词常见题型及答题技巧及练习题(含答案)含解析
英语连词常见题型及答题技巧及练习题(含答案)含解析 一、初中英语连词 1．After the new high-speed railway line began operations, the time on the trip from Lianyungang to Qingdao now is much less than __________in the past. A. one B. this C. that D. it 【答案】 C 【解析】【分析】句意：新高速铁路开通后，连云港到青岛的时间比过去少了很多。A：one，一，同类中的一个；B：this（指时间、距离较近或下文要提到的人或事物）这个；C：that，（指时间、距离较远或指上文提到过人或事物）那，那个；D：it它指与上文的同一个。根据 the time on the trip from Lianyungang to Qingdao now，可知是指上文提到过时间，要用that。故选C。 【点评】考查连词辨析。理解选项意思和用法，根据句子的语法结构，选择正确的连词。 2．—Why do many kids spend more time playing computer games? —Because their parents are _____ busy _____ they have little time to stay with their children. A. too, to B. so, that C. such, that D. enough, to 【答案】 B 3．—In shopping centers of most foreign countries, we can see many products made in China. —What we need is ________ "Made in China", ________ "Created in China". There is still a long way to go. A. both…and B. not only…but also C. neither…nor D. either…or 【答案】 B 4．—Tom, what does "Stay hungry, stay foolish." mean? —You can have your own understanding. But I think it means follow your original aspiration （初心） you will succeed. A. so B. but C. and D. or 【答案】 C 5．The film is really exciting. the students their teacher is enjoying the film. A. Both; and B. Not only; but also C. Either; or D. Neither; nor 【答案】 B 6．—The air pollution is terrible. —It will be worse ______ we take action to protect the environment. A. if B. unless C. until D. when 【答案】 B
[11] 英语语法：状语从句(二)
四、原因状语从句 要点: 由连词because, since, as, in that引导, 也可由for, now that等词引导 1.I didn’t go to school yesterday because I was ill. 我昨天没去上学，因为我生病了。 2. Since everybody is here, let’s begin our meeting. 既然大家都来了, 让我们开始开会吧. 3. As you are in poor health, you should not stay up late. 既然你身体不好, 你就不该熬夜. 4.I asked her to stay to tea,for I had something to tell her. 我请她留下来喝茶,因为我有事要告诉她. for I had something to tell her .I asked her to stay to tea 注：for引导的从句不能放在主句前面。 五、目的状语从句 要点：目的状语从句由连词so that, so…that…. , in order that , such…that,such that, only to, too….to…., in order to, so as to, lest, for fear that, in case (that) 引导。 1.so that 以至, 以便 1、I’ll run slowly so that you can catch up with me. (目的) 我将慢慢跑以至你能赶上我。 2、The boy is so young that he can’t go to school 这个男孩如此小以至于不能上学 3、He is such a clever boy that everybody likes him. 他非常聪明，大家都非常喜欢他。
英语语法连词归纳总结
英语语法连词归纳总结 一、单项选择连词 1．Twenty students want to attend the class that aims to teach to read first. A．what B．who C．how D．why 【答案】C 【解析】 2．I missed supper_______ I’m starving! A．but B．and C．or D．for 【答案】B 【解析】 试题分析：句意：我没吃晚饭，现在我快要饿死了！由句意可知，空格处应该是缺少表示递进的连词，but表转折，or表选择，for表原因，只有and表递进，故选B。 考点: 考查连词的用法。 3．Life isn’t always beautiful, ________ the struggles make you stronger and the changes make you wiser. A．or B．so C．but D．for 【答案】C 【解析】 试题分析：考查连词。句意：生活不总是美丽的，但是困难使你更强壮，改变使你更明智。or或者，否则；so所以，因此；but但是；for因为。故选C。 考点：考查连词 4．I usually sleep with the window open ________ it is really cold. A．if B．unless C．now that D．in case 【答案】B 【解析】 试题分析：考查连词辨析。A. if如果；B. unless除非；C. now that既然；D. in case万一。句意：我通常开着窗户睡觉，除非天气真的很冷。故选B。 考点：考查连词辨析 5．Don’t give up regardless of difficulty and failure, ________ you’ll never achieve your goals. A．and B．but C．or D．so 【答案】C
英语状语从句解题技巧讲解及练习题(含答案)及解析
英语状语从句解题技巧讲解及练习题(含答案)及解析 一、初中英语状语从句 1．— What were you doing ______ I knocked at the door? — I was sleeping. A．unless B．once C．when D．while 【答案】C 【解析】 【详解】 试题分析：句意：－我敲门时，你在做什么？－我在睡觉。A．unless如果不，除非；引导条件状语从句；B．once一旦……，引导条件状语从句；C．when当……时，表示两个动作同时发生，主句一般使用过去时，从句使用过去进行时；D．while当……时，表示两个动作同时发生，后跟延续性动词，从句一般使用进行时态，表示一段时间。本题表示“当……时”，knock是非延续性动词，故选C。 考点：考查连词辨析。 2． Lucy knew nothing about it _____ her sister told her. A．because B．until C．if D．since 【答案】B 【解析】 试题分析：句意：露西直到她姐姐告诉她才知道这件事。Because因为； until直到； if如果； since自从。Not···until直到···才，是一个固定句型。所以选B。 考点：考查连词。 3．I won't go he comes back. A．until B．while C．when D．why 【答案】A 【解析】 句意：直到他回来，我才走。A. until 直到； B. while当---时候； C. when当---时候； D. why为什么；not---until--- 直到---才---；故选A 4．________ there is danger on the internet, online insurance is still popular among the young. A．Unless B．Though C．Since D．Until 【答案】B 【解析】 【详解】 句意：虽然网上存在危险，但网上保险在年轻人中仍然很流行。考查连词辨析。A. Unless 除非，如果不，引导条件状语从句；B. Though尽管，虽然，引导让步状语从句；C. Since
初三英语中考语法考点重难点解读指导(二十九)Because肯定句和否定句用法含义辨析
2021届初三英语中考语法考点重难点解读指导（二十九）Because肯定句和否定句用法含义辨析 Because这个词，对于我们老师、甚至低年级的同学们来说，都是很简单的词汇。翻译成“因为”。比如，疫情期间我一直在家，因为外面不安全。很简单嘛，真的是这样吗？ 一. Because 用在肯定句中 Because用在肯定句（主句是肯定句）中的时候，应该来说，是没有问题的。唯一需要注意的点就是because不能与so连用，毕竟两个连词是冤家嘛。 比如：Just because I don’t complain, people think I’m satisfied. (牛津高阶例句) 比如：I did it because he told me do.(牛津高阶例句) 注意：because这个连词，位置比较灵活，除了必须放在从句的句首外，从句放在主句的前面或者后面都可以。但because放在肯定主句的后面，中间不加逗号。
很好，大家在这一部分，是没有问题的，也是不应该有问题的。 Because of是短语，后加名词或短语，不能加句子 比如：They are here because of us. (牛津高阶例句) 比如：Because of his wife being there, I said nothing about it.(牛津高阶例句) Because 和because of 的区别是初中的重点，这里不做多说。 二．Because（of）遇见not 请问1 ①“I wouldn’t recommend chicken pox parties because of the risk.” 和 ②“I wouldn’t recommend chicken pox parties, because of the risk.” 这两句一样吗?
because,since,as和for的区别
because, as, for, since这几个词都是表示“原因”的连词，语气由强至弱依次为：because→since→as→for;其中because, since, as均为从属连词，引导原因状语从句；而for 是并列连词，引导并列句。 1. because表示直接原因，它所指的原因通常是听话人所不知道的，其语气最强。常用来回答why的提问，一般放于主句之后，也可以单独存在。例如： (1)I stayed at home because it rained. 因为下雨我呆在家里。 (2)Because Lingling was ill, she didn”t come to school. 玲玲因病，没有上学。 (3)?Why is she absent? 她为什么缺席？ ?Because she is sick. 因为她病了。 此外，在强调句型中，只能用because。例如： (4)It was because I missed the early bus that I was late for
school. 我上学迟到是因为我没有赶上早班汽车。 2. since侧重主句，从句表示显然的或已为人所知的理由，常译为“因为”、“既然”，语气比because稍弱，通常置于句首，表示一种含有勉强语气的原因。例如： (1)Since he asks you, you”ll tell him why. 他既然问你，那就告诉他为什么吧。 (2)Since everyone is here, let”s start. 既然大家都到齐了，我们就出发吧！ (3)Since I understood very little Japa nese, I couldn”t follow the conversation. 我日语懂得不多，因而听不懂对话。 3. as是常用词，它表示的“原因”是双方已知的事实或显而易见的原因，或者理由不是很重要，含义与since相同，但语气更弱，没有since正式，常译为“由于，鉴于”。从句说明原因，主句说明结果，主从并重。例如： (1)We all like her as she is kind. 我们都喜欢她，因为她善良。
【英语】英语状语从句题20套(带答案)含解析
【英语】英语状语从句题20套(带答案)含解析 一、初中英语状语从句 1．The nurse won't leave her patients________she's sure they are all taken good care of. A．unless B．because C．since D．if 【答案】A 【解析】 句意：这个护士不会离开她的病人，除非她确定病人们都被照顾得很好。because因为，引导原因状语从句；since自从，引导时间状语从句；既然，引导原因状语从句；if如果，引导条件状语从句；unless除非，如果不，引导条件状语从句。根据句意可知，这里考查的是从属连词unless，故选A。 2．I have to leave now __ I can catch the last bus. A．so that B．because of C．until D．as soon as 【答案】A 【解析】 试题分析：so that以便，所以；because of因为，由于；until直到；as soon as一……就……。句意：为了赶上末班车，我现在必须离开了。结合语境可知选A。 考点：连词辨析 点评：连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词。连词的用法都比较多，语义之间还有交叉，熟记其基本应用规则，了解其区别，注意固定搭配对象，是做好此类题型的关键。 3．— When did you go to bed last night? — ____________ I finished my homework. A．Until B．Not until C．When D．While 【答案】B 【解析】 not …until 表示直到…才，与短暂性动词连用，故选B 4．You'd better get home earlier today we can go out for a big meal. A．in order to B．such that C．so that D．in order 【答案】C 【解析】句意：你最好今天早点回家，这样我们就可以出去吃大餐了。A. in order to 为了，后跟动词原形；B. such that没有此用法；C. so that为了，引导目的状语从句；D. in order+that+从句，引导目的状语从句。we can go out for a big meal表示目的的完整句子，所以使用连词词组so that。故选：C。
(近几年)初中英语语法之状语从句运用与中考高频考点试题梳理详解(含答案解析11页汇编)
（近几年）初中英语语法之状语从句运用与中考高频考点试题梳理详解（含答案解析） 时间状语从句：在一个句子中作时间状语的句子。 时间状语的连接词：when(当…时候) while(当…时候) as(当…时候) after(在…以后) before(在…以前) as soon as(一…就) since(自从…到现在) till /until(直到… 才) by the time(到…为止)依旧是连接词后加陈述语序。 举例：when当…的时候(一般情况下主句是将来时的时候，从句要用一般现在时。) Mozart started writing music when he was four years old. 原因状语从句：在一个句子中作原因语的句子。 连接词：由连词because, since, as引导, 也可由for, now that 等词引导。 举例：I didn’t go to school yesterday because I was ill. 条件状语从句 连接词：if如果, unless (=if not) 除非。(让步) 举例：If it doesn’t rain tomorrow, we will go hiking. 目的、结果状语从句 目的状语从句是指在一个句子中充当目的状语的句子。
结果状语从句是指在一个句子中充当结果状语的句子 目的状语从句连接词so that, so…that , in order that 引导。 结果状语从句连接词 so…that, such…that, so much/many…that引导。 举例：so…that 如此…以至于 The scientist’s report was so instructive that we were all very excited. 让步状语从句 让步状语从句是指在句子中作让步的状语的句子 连接词： though, although.，whether…or not 举例：Although he is rich, yet he is not happy. 高频考点一：考查时间状语从句 例2． I believe you will have a wonderful time here ________ you get to know everyone else. A．though B．as if C．once D．so that 【答案】C 【解析】考查语意逻辑关系。句意：________你认识了这里的其他所有人，我相信你会在这里玩得很愉快的。though意为“虽然”，引导让步状语从句；as if意为“好像，仿佛”，引导方式状语从句或表语从句； once“一旦”，引导时间状语从句；so that“以便；
考研英语语法考点详解连词辨析(when, while和as)
考研英语语法考点详解连词辨析（when, while和as） 1.若暗示一种规律性，表示“每当……的时候”，一般要用when。例如： •It’s cold when it’s windy. 每当刮风时天就冷。 •When the fruits are ripe, they fall from the trees. 每当果实成熟时，它们就会从树上落下。 2.当主句和从句的动作先后发生时，一般用when。例如： •When I finished the four years in prison, I went to find a job. 四年的监狱生活结束后，我去找了份工作。 •When the market for nutria collapsed in the late 1980s, the cat-sized animals multiplied like crazy. 20世纪80年代末海狸鼠皮草市场衰落后，这种猫大小的动物开始疯狂繁殖。 3.在时间状语从句中，用一般现在时表示一般将来时，用一般过去时表示过去将来时，常用when。例如：
•When every pupil in the school wears the uniform, nobody will have to worry about fashion.当学校里的每个学生都穿校服时，没有人会担心时尚。 •I said I would tell him when he came back. 我说他回来时我就告诉他。 4.在hardly/scarcely…when...(一……就......)句式中，只能用when。例如： •Hardly had I got out of the house when it began to rain. 我刚走出屋子，天就开始下雨了。 5.表示“当……的时候”，while从句中的谓语动词必须是延续性动词，多用进行时态，表示主句动作和从句动作同时发生，持续时间较长。例如： •David rang up while you were out. 你不在的时候戴维打电话来了。 •I'll keep you company while you're waiting. 你等待时我会陪伴你。 6.表示相随渐变的情况，常用as, 意为“一边……一边......；随着”，as所表示的动作与主句动作同时发生。例如：
英语重点词汇辨析because,because of,since,as for
英语重点词汇辨析because,because of,since,as for because,because of,since,as,for这几个词都可以表示“原因”，语气由强至弱依次为： because(because of)→since→as→for. 首先分别了解一下他们: 1. Because 释义：conj.因为。 表示直接原因，其语气最强。 常用来回答why的提问，一般放于主句之后，也可以单独存在。because是从属连词，后接原因状语从句。 because不能与so连用。 理解重点： 直接原因、回答why、强调句型 例句: Because it was raining, we stayed at home.
因为下雨，所以我们得呆在家里。 Why you choose this sport? 你为什么选择这项运动？ He left because he didn't want to be tagged as a soap star. 他之所以离开是因为他不想被人称作是肥皂剧明星。 2.Because of 释义:conj.因为，由于（说明） 表示直接原因，其语气最强。 because of是个介词短语，不可以引导原因状语从句，而应该接名词、代词、动词的ing形式或者名词性从句等。 理解重点：直接原因 例句: Because of my country accent, people identified me with a homely farmer's wife.
由于我的乡下口音，人们将我等同于平常的农妇。 The team might be seeded because of their pull within soccer's international body. 凭其在国际足球机构的影响力，该队有可能被定为种子队。 Many quite reasonable people were at panic stations because of popular unrest. 许多相当理智的人由于普遍的不安情绪也处于紧张状态。 补充一下: because接原因状语从句等同于becasue of接名词、代词或动名词. 例如: Many living things lose their homes because people keep cutting down trees. =Many living things lose their homes because of deforestation. 由于人们砍伐森林，很多生物都失去了他们的家园。
比较Because,Since,As和For的用法
比较Because，Since，As和For的用法 英语中常用介词Because，since，as 和for 表示原因和理由,但它们的用法又不尽相同，有的 表直接原因，有的表间接原因。它们有语气的不同，在句中的位置也有区别。学习中要注意 把握区别，正确使用。本文现对Because，since，as and for的用法和比较作以下分析。请看 下面的几个句子： 1.Please drop in often，for we are always eager to see you.（请常来坐坐，我们总是热望见到你。） 2.Since force is no remedy，let us try conciliation.（既然武力无济于事，让我们试试和谈吧。） 3.As it is going to rain, let’s stop working.（因为要下雨了，我们停止工作吧。） 4.I know Mr. Green didn’t go with them, because I saw him just now.（我知道戈林先生没有和他 们一道去，因为我刚才看见他。） 二 虽说because，since，as 和for 都能表达理由和原因，但它们之间是有区别的： 第一，强调表达直接原因多用because表达。Because一词特别强调理由和原因；而且，由 它所连接的从句多半放在主句之后来进行解释。例如： 1.That youth has been praised because he works hard without complaint.（那位青年被表扬，因 为他工作努力毫无怨言。） 2.I did it because I thought it would help you so much. (我做这事是因为我认为它会对你有很大帮助的。) 第二，如果表达的原因、理由是显而易见的，多用for 这个连词。For 所表达的“因为”这一概念，不如because 强烈，且在口语中已不常用。例如： 1.I offered to take responsibility upon myself because the secretary asked me to do so.（我主动提出自己负责是秘书要我这么做的。） 2.I asked him to come for a moment, for I had something to tell him.（我请他过来一会儿，因为 我有事要告诉他。） 第三，如果所表达的理由中含有推理的含义，多用since和as，不过since 语气比as 强，所 表达内容有它自己的独特色彩。例如： 1.Since he had come, you had to help him .(既然他来了，你就得帮助他。) 2.As he had come, you had to help him.（因为他来了，你得帮助他。） 三 as, for, because 和since 是同义，有时可通用，但还有区别：as 和since 强调后果，since 比as 更强调理由；由for 和because则强调原因，而because又比for的效果更强些。例如： 1.As that was not my name, (of course) I didn’t answer. （因为那不是我的名字，我（当然）不回答。）