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中考英语:since与for用法

中考英语:since与for用法
中考英语:since与for用法

现在完成时态中的since 与for

1. 实例:

We have studied English for more than 2 years. 我们学英语已有两年多时间了。

She has been ill since last Sunday. 她从上周星期天一直病到现在。

2. 用法说明:

(1) 介词for 短语表示一个时间段,指某个动作或情况到现在为止已持续了多久,提问时用how long;since 作为介词,接一个时间名词,作为连词,引导一个时间状语从句(从句动词一般是短暂性动词),since 表示“自…以来”,指某个动作或情况从过去某一点时间一直持续到现在,因此,与for 或since 引出的时间状语连用的句子(或主语)谓语动词必须是持续性的(如上面两句中的动词study 和be)

(2) 英语中有些动词的意义不能持续,表示的是一瞬间就结束的动作,这些动词被称为非持续性动词或短暂性动词,常见的如come, leave, go, lose, see, begin, start, arrive, bec ome, die, buy, borrow, close, join, reach, fall, get up 等。这类动词可以用于完成时态,但在肯定句中不能与表示动作延续的时间状语for 或since 短语连用。如:正:He has come back. 他已回来。

误:He has come back for three days.

若要表示“他回来已三天了”这样的意思,可以将动词改为延续性动词,或改变时间状语,或改用别的句型等,如译为:

He has been back for three days. (改变谓语动词)

He has been back since three days ago. (改变谓语动词)

He came back three days ago. (改变时间状语及动词时态)

It’s three days since he came back. (改变句型)

(3) 非持续性动词用于完成时态,在肯定句中不能与for 或since引出的短语(或句子)连用,但在否定句中是可以的,因为一个非延续性动词一旦被否定即成为状态,而状态总是可以延续的。如:(https://www.doczj.com/doc/0e12747712.html,)

I haven’t seen him for a long time. 我很久没见到他了。

He hasn’t come here for some time. 他有段时间没来了。

I haven’t heard from her since she left. 自他离开以后,我一直没收到她的来信。

(完整版)介词for用法归纳

介词for用法归纳 用法1:(表目的)为了。如: They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做? That’s what we’re here for. 这正是我们来的目的。 What’s she gone for this time? 她这次去干什么去了? He was waiting for the bus. 他在等公共汽车。 【用法说明】在通常情况下,英语不用for doing sth 来表示目的。如: 他去那儿看他叔叔。 误:He went there for seeing his uncle. 正:He went there to see his uncle. 但是,若一个动名词已名词化,则可与for 连用表目的。如: He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意:若不是表目的,而是表原因、用途等,则其后可接动名词。(见下面的有关用法) 用法2:(表利益)为,为了。如: What can I do for you? 你想要我什么? We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗? Do more exercise for the good of your health. 为了健康你要多运动。 【用法说明】(1) 有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等),当双宾语易位时,通常用for 来引出间接宾语,表示间接宾语为受益者。如: She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意,类似下面这样的句子必须用for: He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思,在一些及物动词后误加介词for: 他们决定在电视上为他们的新产品打广告。 误:They decided to advertise for their new product on TV. 正:They decided to advertise their new product on TV. 注:advertise 可用作及物或不及物动词,但含义不同:advertise sth=为卖出某物而打广告;advertise for sth=为寻找某物而打广告。如:advertise for a job=登广告求职。由于受汉语“为”的影响,而此处误加了介词for。类似地,汉语中的“为人民服务”,说成英语是serve the people,而不是serve for the people,“为某人的死报仇”,说成英语是avenge sb’s death,而不是avenge for sb’s death,等等。用法3:(表用途)用于,用来。如: Knives are used for cutting things. 小刀是用来切东西的。 This knife is for cutting bread. 这把小刀是用于切面包的。 It’s a machine for slicing bread. 这是切面包的机器。 The doctor gave her some medicine for her cold. 医生给了她一些感冒药。 用法4:为得到,为拿到,为取得。如: He went home for his book. 他回家拿书。 He went to his friend for advice. 他去向朋友请教。 She often asked her parents for money. 她经常向父母要钱。

英语介词for的用法归纳总结.doc

英语介词for的用法归纳总结用法1:(介词for表目的)为了 They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做? That s what we re here for. 这正是我们来的目的。 What s she gone for this time? 她这次去干什么去了? He was waiting for the bus. 他在等公共汽车。 【用法说明】在通常情况下,英语不用for doing sth 来表示目的 他去那儿看他叔叔。 误:He went there for seeing his uncle. 正:He went there to see his uncle. 但是,若一个动名词已名词化,则可与for 连用表目的 He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意:若不是表目的,而是表原因、用途等,则其后可接动名词。(见下面的有关用法) 用法2:(介词for表利益)为,为了 What can I do for you? 你想要我什么? We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗?

Do more exercise for the good of your health. 为了健康你要多运动。 【用法说明】(1) 有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等),当双宾语易位时,通常用for 来引出间接宾语,表示间接宾语为受益者 She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意,类似下面这样的句子必须用for: He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思,在一些及物动词后误加介词for: 他们决定在电视上为他们的新产品打广告。 误:They decided to advertise for their new product on TV. 正:They decided to advertise their new product on TV. 注:advertise 可用作及物或不及物动词,但含义不同:advertise sth=为卖出某物而打广告;advertise for sth=为寻找某物而打广告advertise for a job=登广告求职。由于受汉语为的影响,而此处误加了介词for。类似地,汉语中的为人民服务,说成英语是serve the people,而不是serve for the people,为某人的死报仇,说成英语是avenge sb s death,而不是avenge for sb s death,等等。 用法3:(介词for表用途)用于,用来 Knives are used for cutting things. 小刀是用来切东西的。

人教版英语八年级下册试题since 和 for 的用法(用于现在完成时)

初中英语学习材料 madeofjingetieji since 和for 的用法(用于现在完成时) 表示过去已经开始持续到现在的动作或状态常用的时间状语有:for, since, how long, so far, these days等。 1. since : a).since +时间点①年代②时刻数③一段时间+ago b).现在完成时:主句(主语+have/has +延续性动词的过去分词)+ since +从句一般过去时 c) It’s +时间段+since +短暂性动词的过去式 d).时间段+has passed +since +短暂性动词的过去式 for +一段时间 练习: 用since和for填空 1) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here 12). He has lived in Nanjing ________ the year before last. 13). I’ve known him __________ we were children. 14). Our teacher has studied Japanese _________ three years. 15). She has been away from the city ___________ about ten years. 16). It’s about ten years __________ she left the city. 2. for: for +一段时间= since +一段时间+ ago 3. 与时间段连用时,短暂性动词应改为相应的延续性动词。 1) come/go to ------ be at /in 2)leave ----be away from 3)buy ----have 4) borrow /lend -----keep 4)open ---be open 5)close---be closed 6) die---be dead 7) start/begin ----be on 8) join—--be in /be a member of /be a soldier 9) become –be 10) fall asleep ---be asleep 11)catch a cold – have a cold 12) have/has gone to → have been in 13) put on → wear14) finish/end → be over 15) marry → be married 练习:.短暂性转换延续性 1) His grandfather died two years ago . His grandfather has ____ ____ for two years. _____two years _____ his grandfather ____. Two years ____ ____ ____ his grandfather _____. 2) I became a teacher in 2000. I ________ __________ a teacher for _________ _________. 3) The shop closed two hours ago. The shop ________ _________ _________ for _________ _________. 4) The door opened at six in the morning. The door ________ ________ ________ for six hours. 5)He left Fuzhou just now. He _______ ________ ________ _________ Fuzhou for five minutes. 6)The film began two minutes ago. The film ____ ____ ____ for ____ ____.How time flies! 7)They borrowed it last week. They _________ _________ it since __________ __________. 8)I bought a pen two hours ago. I _________ _________ a pen for ________ __________. 9)They married in 1990. They ________ _________ __________since _________. 10)The meeting finished at six. The meeting ________ ______ ______ for six hours. 11)My brother joined the army two years ago.

because,since,as,for的用法区别

because、since、as、for的用法区别 because、since、as、for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和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。 ?because 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,一般放在主句之后,也可以单独存在例如: (1)Istayed at home because it rained. 因为下雨,我呆在家里。 (2)B ecause Lingling was ill, she didn’t come to school. 玲玲因为生病,没有上学。 (3)—Why is she absent? 她为什么缺席? —Because she is sick. 因为她病了。 (4)此外,在强调句型中只能用because。例如, It was because I missed the early bus that I was late for school. 我上学迟到是因为我错过了早班车。 ?since 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)Si nce he asks you, you’ll tell him why. 他既然问你了,那就告诉他为什么吧。 (2)Si nce everyone is here, let’s start. 既然大家都到齐了,我们就是出发吧。 (3)Since I understood very little Japanese, I c ouldn’t follow the conversation. 我日语懂得不多,因而听不懂对话。 ?as 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,由于理由不是很重要,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:

of与for的用法以及区别

of与for的用法以及区别 for 表原因、目的 of 表从属关系 介词of的用法 (1)所有关系 this is a picture of a classroom (2)部分关系 a piece of paper a cup of tea a glass of water a bottle of milk what kind of football,American of soccer? (3)描写关系 a man of thirty 三十岁的人 a man of shanghai 上海人 (4)承受动作 the exploitation of man by man.人对人的剥削。 (5)同位关系 It was a cold spring morning in the city of London in England. (6)关于,对于 What do you think of Chinese food? 你觉得中国食品怎么样? 介词 for 的用法小结 1. 表示“当作、作为”。如: I like some bread and milk for breakfast. 我喜欢把面包和牛奶作为早餐。What will we have for supper? 我们晚餐吃什么?

2. 表示理由或原因,意为“因为、由于”。如: Thank you for helping me with my English. 谢谢你帮我学习英语。 Thank you for your last letter. 谢谢你上次的来信。 Thank you for teaching us so well. 感谢你如此尽心地教我们。 3. 表示动作的对象或接受者,意为“给……”、“对…… (而言)”。如: Let me pick it up for you. 让我为你捡起来。 Watching TV too much is bad for your health. 看电视太多有害于你的健康。 4. 表示时间、距离,意为“计、达”。如: I usually do the running for an hour in the morning. 我早晨通常跑步一小时。We will stay there for two days. 我们将在那里逗留两天。 5. 表示去向、目的,意为“向、往、取、买”等。如: let’s go for a walk. 我们出去散步吧。 I came here for my schoolbag.我来这儿取书包。 I paid twenty yuan for the dictionary. 我花了20元买这本词典。 6. 表示所属关系或用途,意为“为、适于……的”。如: It’s time for school. 到上学的时间了。 Here is a letter for you. 这儿有你的一封信。 7. 表示“支持、赞成”。如: Are you for this plan or against it? 你是支持还是反对这个计划? 8. 用于一些固定搭配中。如: Who are you waiting for? 你在等谁? For example, Mr Green is a kind teacher. 比如,格林先生是一位心地善良的老师。

介词for 的常见用法归纳

介词for 的常见用法归纳 贵州省黔东南州黎平县黎平一中英语组廖钟雁介词for 用法灵活并且搭配能力很强,是一个使用频率非常高的词,也是 高考必考的重要词汇,现将其常见用法归纳如下,供参考。 1.表时间、距离或数量等。 ①意为“在特定时间,定于,安排在约定时间”。如: The meeting is arranged for 9 o’clock. 会议安排在九点进行。 ②意为“持续达”,常于last、stay 、wait等持续性动词连用,表动作持续的时间,有时可以省略。如: He stayed for a long time. 他逗留了很久。 The meeting lasted (for)three hours. 会议持续了三小时。 ③意为“(距离或数量)计、达”。例如: He walked for two miles. 他走了两英里。 The shop sent me a bill for $100.商店给我送来了100美元的账单。 2. 表方向。意为“向、朝、开往、前往”。常与head、leave 、set off、start 等动词连用。如: Tomorrow Tom will leave for Beijing. 明天汤姆要去北京。 He put on his coat and headed for the door他穿上大衣向门口走去。 介词to也可表示方向,但往往与come、drive 、fly、get、go、lead、march、move、return、ride、travel、walk等动词连用。 3.表示理由或原因,意为“因为、由于”。常与thank、famous、reason 、sake 等词连用。如: Thank you for helping me with my English. 谢谢你帮我学习英语。 For several reasons, I’d rather not meet him. 由于种种原因,我宁可不见他。 The West Lake is famous for its beautiful scenery.西湖因美景而闻名。 4.表示目的,意为“为了、取、买”等。如: Let’s go for a walk. 我们出去散步吧。 I came here for my schoolbag.我来这儿取书包。 He plays the piano for pleasure. 他弹钢琴是为了消遣。 There is no need for anyone to know. 没必要让任何人知道。 5.表示动作的对象或接受者,意为“给、为、对于”。如: Let me pick it up for you. 让我为你捡起来。 Watching TV too much is bad for your health. 看电视太多有害于你的健康。 Here is a letter for you. 这儿有你的一封信。

中考英语:since与for用法

现在完成时态中的since 与for 1. 实例: We have studied English for more than 2 years. 我们学英语已有两年多时间了。 She has been ill since last Sunday. 她从上周星期天一直病到现在。 2. 用法说明: (1) 介词for 短语表示一个时间段,指某个动作或情况到现在为止已持续了多久,提问时用how long;since 作为介词,接一个时间名词,作为连词,引导一个时间状语从句(从句动词一般是短暂性动词),since 表示“自…以来”,指某个动作或情况从过去某一点时间一直持续到现在,因此,与for 或since 引出的时间状语连用的句子(或主语)谓语动词必须是持续性的(如上面两句中的动词study 和be) (2) 英语中有些动词的意义不能持续,表示的是一瞬间就结束的动作,这些动词被称为非持续性动词或短暂性动词,常见的如come, leave, go, lose, see, begin, start, arrive, bec ome, die, buy, borrow, close, join, reach, fall, get up 等。这类动词可以用于完成时态,但在肯定句中不能与表示动作延续的时间状语for 或since 短语连用。如:正:He has come back. 他已回来。 误:He has come back for three days. 若要表示“他回来已三天了”这样的意思,可以将动词改为延续性动词,或改变时间状语,或改用别的句型等,如译为: He has been back for three days. (改变谓语动词) He has been back since three days ago. (改变谓语动词) He came back three days ago. (改变时间状语及动词时态) It’s three days since he came back. (改变句型) (3) 非持续性动词用于完成时态,在肯定句中不能与for 或since引出的短语(或句子)连用,但在否定句中是可以的,因为一个非延续性动词一旦被否定即成为状态,而状态总是可以延续的。如:(https://www.doczj.com/doc/0e12747712.html,) I haven’t seen him for a long time. 我很久没见到他了。 He hasn’t come here for some time. 他有段时间没来了。 I haven’t heard from her since she left. 自他离开以后,我一直没收到她的来信。

英语中for的用法讲解

英语中for的用法讲解 英语中for的用法讲解? for 1. prep. (1)因为,由于for this reason (2) 表示时间\距离长度;for three days;He ran for three miles. (3) 为了:What do you come here for? (4) 表示等价交换:He sold his house for 30,000 dollars. (5) 开往;前往We set off for London. (6) 代;替;代表Red is for danger. (7) 用于for + 名词或代词+ to + 不定式动词的名词短语中The bell rang for the lesson to begin. 2. conj 因为(表示推测或附加的原因,前后为并列句) It must have rained last night, for the ground is wet. Kuntta ( a prisoner ) knew day broke, for he heard the birds singing. 尽管for 的用法较多,但记住常用的几个就可以了。for的用法的确很多,可用作介词和连词,介词用法尤为丰富。以下详细列出了用法和句例,供你参考。for 1 preposition 1 used to say who is intended to get or use something, or where

something is intended to be used I've got a present for you. Someone left a message for Vicky. 2 in order to help someone or something I looked after the kids for them. Let me carry that bag for you. 3 used to say what the purpose of an object, action etc is for doing something a knife for cutting bread What did you do that for? 4 in order to have, do, get, or obtain something Are you waiting for the bus? the qualifications necessary for a career in broadcasting 5 used to say how long an action or situation continues for Bake the cake for 40 minutes. We had been talking for a good half hour. 6 used to talk about distance We walked for miles. Factories stretch for quite a way along the canal. 7 if something is arranged for a particular time, it is planned that it should happen then I've invited them for 9 o'clock.

最新英语连词for的用法总结

精品文档 精品文档英语连词for的用法总结 1、for在英语学习中,我们经常用到,for做连词时引导原因状语从句,主要表示理由,用于引导的分句对前面的话进行解释,起到补充说明的意思,常用逗号把它和前面的分句分开。例如: Humanity had better hope so, anyway,for the truth will soon out for the entire species.不管怎样,人类最好希望如此,因为这种真理将对整个人类显示出来。He must be in now, for the light in his room is on. 他现在一定在家,因为他房间的灯是亮着的。(灯亮其实并不能说明人一定在家)。注意:for表示原因时的四个“不能”for引导的从句不能位于它所解释的动词之前、for引导的从句不能位于not, but或任何连词之后、for引导的从句不能用于回答问题、for引导的从句不能单单用来复述已讲过的话,而必须包括新的内容。for 引导的从句不能直接说明某一特定动作发生的原因,而只能提供一些起帮助解释作用的附加说明。2、for的用法很广泛,for除了用作连词表示原因、理由之外,它还可以用作介词等: 1)表示“当作、作为”。如: I like some bread and milk for breakfast. 我喜欢把面包和牛奶作为早餐。What will we have for supper? 我们晚餐吃什么? 2)表示动作的对象或接受者,意为“给……”、“对…… (而言)”。如: Let me pick it up for you. 让我为你捡起来。 Watching TV too much is bad for your health. 看电视太多有害于你的健康。3)表示时间、距离,意为“计、达”。如: I usually do the running for an hour in the morning. 我早晨通常跑步一小时。We will stay there for two days. 我们将在那里逗留两天。 4)表示去向、目的,意为“向、往、取、买”等。如: Let's go for a walk. 我们出去散步吧。 I came here for my schoolbag.我来这儿取书包。 I paid twenty yuan for the dictionary. 我花了20元买这本词典。 5)表示所属关系或用途,意为“为、适于……的”。如: It's time for school. 到上学的时间了。 Here is a letter for you. 这儿有你的一封信。 6)表示“支持、赞成”。如: Are you for this plan or against it? 你是支持还是反对这个计划?

for的用法完全归纳

for的用法完全归纳 用法1:(表目的)为了。如: They went out for a walk. 他们出去散步了。 What did you do that for? 你干吗这样做? That’s what we’re here for. 这正是我们来的目的。 What’s she gone for this time? 她这次去干什么去了? He was waiting for the bus. 他在等公共汽车。 在通常情况下,英语不用for doing sth 来表示目的。如:他去那儿看他叔叔。 误:He went there for seeing his uncle.正:He went there to see his uncle. 但是,若一个动名词已名词化,则可与for 连用表目的。如: He went there for swimming. 他去那儿游泳。(swimming 已名词化) 注意:若不是表目的,而是表原因、用途等,则其后可接动名词。 用法2:(表利益)为,为了。如: What can I do for you? 你想要我什么? We study hard for our motherland. 我们为祖国努力学习。 Would you please carry this for me? 请你替我提这个东西好吗? Do more exercise for the good of your health. 为了健康你要多运动。 (1)有些后接双宾语的动词(如buy, choose, cook, fetch, find, get, order, prepare, sing, spare 等),当双宾语易位时,通 常用for 来引出间接宾语,表示间接宾语为受益者。如: She made her daughter a dress. / She made a dress for her daughter. 她为她女儿做了件连衣裙。 He cooked us some potatoes. / He cooked some potatoes for us. 他为我们煮了些土豆。 注意,类似下面这样的句子必须用for: He bought a new chair for the office. 他为办公室买了张新办公椅。 (2) 注意不要按汉语字面意思,在一些及物动词后误加介词for: 他们决定在电视上为他们的新产品打广告。 误:They decided to advertise for their new product on TV. 正:They decided to advertise their new product on TV. 注:advertise 可用作及物或不及物动词,但含义不同:advertise sth=为卖出某物而打广告;advertise for sth=为寻找某物而打广告。如:advertise for a job=登广告求职。由于受汉语“为”的影响,而此处误加了介词for。类似地,汉语中的“为人民服务”,说成英语是serve the people,而不是serve for the people,“为某人的死报仇”,说成英语是avenge sb’s death,而不是avenge for sb’s death,等等。 用法3:(表用途)用于,用来。如: Knives are used for cutting things. 小刀是用来切东西的。 This knife is for cutting bread. 这把小刀是用于切面包的。 It’s a machine for slicing bread. 这是切面包的机器。 The doctor gave her some medicine for her cold. 医生给了她一些感冒药。 用法4:为得到,为拿到,为取得。如: He went home for his book. 他回家拿书。 He went to his friend for advice. 他去向朋友请教。 She often asked her parents for money. 她经常向父母要钱。 We all hope for success. 我们都盼望成功。 Are you coming in for some tea? 你要不要进来喝点茶? 用法5:给(某人),供(某人)用。如: That’s for you. 这是给你的。 Here is a letter for you. 这是你的信。 Have you room for me there? 你那边能给我腾出点地方吗? 用法6:(表原因、理由)因为,由于。如:

Since-和-for-的用法及区别

S i n c e-和-f o r-的用 法及区别 -CAL-FENGHAI-(2020YEAR-YICAI)_JINGBIAN

Since 和 for 的用法及区别: 一,since 的四种用法 1,since + 过去一个时间点(如具体的年、月、日期、钟点、ago. 1990 , last month , half past six I have been here since 1990. 1990起,我一直在这儿。 2,since+ 一段时间+ago I h a v e b e e n h e r e s i n c e f i v e m o n t h s a g o。自从五个月前,我已经在这儿了。 3,since+从句Great Changes have taken place since you left. 自从你走后,已经发生了很大的变化。 4,It is +一段时间+since从句 I t i s t w o y e a r s s i n c e I b e c a m e a n E n g l i s h t e a c h e r.我成为英语老师有两年了。 二,Since 和for区别 1,Since +时间点,具体时间 “自从、、、、以来,从、、、以后”用来说明动作起始时间 I have been in Beijing since 2010. 2,For + 时间段,用来说明动作延续时间长度,因此句中的谓语动词,也应该是延续性动词。 I have been in Beijing for one year。 We have learnt English for about three years. I have been here for 3 days. (对) I have arrived here for 3 days.(误) 三,延续性动词和终止性动词的概念 英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。 延续性动词 表示能够延续的动作,这种动作可以延续下去或产生持久影响。如:

as because for since用法区别

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 littl e Japanese, 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。 (2)As I had a cold, I was absent from school. 因为我感冒了,所以没去上课。 (3)As Xiaowang was not ready, we went without him. 由于小王没有准备好,我们只好不带他去了。 4. for用作连词时,与because相似,但它所表示的原因往往提供上文未交待过的情况。for 不表示直接原因,表明附加或推断的理由,因此for被看作等立连词,它所引导的分句只能

英语形容词和of for 的用法

加入收藏夹 主题: 介词试题It’s + 形容词 + of sb. to do sth.和It’s + 形容词 + for sb. to do sth.的用法区别。 内容: It's very nice___pictures for me. A.of you to draw B.for you to draw C.for you drawing C.of you drawing 提交人:杨天若时间:1/23/2008 20:5:54 主题:for 与of 的辨别 内容:It's very nice___pictures for me. A.of you to draw B.for you to draw C.for you drawing C.of you drawing 答:选A 解析:该题考查的句型It’s + 形容词+ of sb. to do sth.和It’s +形容词+ for sb. to do sth.的用法区别。 “It’s + 形容词+ to do sth.”中常用of或for引出不定式的行为者,究竟用of sb.还是用for sb.,取决于前面的形容词。 1) 若形容词是描述不定式行为者的性格、品质的,如kind,good,nice,right,wrong,clever,careless,polite,foolish等,用of sb. 例: It’s very kind of you to help me. 你能帮我,真好。 It’s clever of you to work out the maths problem. 你真聪明,解出了这道数学题。 2) 若形容词仅仅是描述事物,不是对不定式行为者的品格进行评价,用for sb.,这类形容词有difficult,easy,hard,important,dangerous,(im)possible等。例: It’s very dangerous for children to cross the busy street. 对孩子们来说,穿过繁忙的街道很危险。 It’s difficult for u s to finish the work. 对我们来说,完成这项工作很困难。 for 与of 的辨别方法: 用介词后面的代词作主语,用介词前边的形容词作表语,造个句子。如果道理上通顺用of,不通则用for. 如: You are nice.(通顺,所以应用of)。 He is hard.(人是困难的,不通,因此应用for.) 由此可知,该题的正确答案应该为A项。 提交人:f7_liyf 时间:1/24/2008 11:18:42

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