初中英语时间状语从句ppt

初中英语时间状语从句 ppt 关于艾滋病ppt课件精益管理ppt下载地图下载ppt可编辑假如ppt教学课件下载triz基础知识ppt 篇一:初中英语状语从句 初中英语状语从句 【考点直击】 1. 时间状语从句 2. 条件状语从句 3. 原因状语从句 4. 结果状语从句 5. 比较状语从句 6. 目的状语从句 7. 让步状语从句 8. 地点状语从句 【名师点睛】 用来修饰主句中的动词，副词和形容词的从句叫状语从句。根据其含义状语从句可分为时间状语从句，地点状语从句，条件状语从句， 原因状语从句，结果状语从句，比较状语从句，目的状语从句，让步状语从句。 1 1. 时间状语从句 (1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如: It was raining hard when got to school yesterday. While he was doing his homework, the telephone rang. As he walked along the lake, he sang happily. He had learned a little Chinese before he came to China. After he finished middle school, he went to work in a factory. (2)在时间状语从句里，通常不用将来时态，用现在时态表 示将来的动作或状态。例如: I’ll ring you up as soon as I get to New York. I will tell him everything when he comes back. He won’t believe it until he sees it with his own eyes. (3)在带有till或until引导的时间状语从句的主从复合句 里，如果主句用肯定式，其含义是“一直到……时”，谓语动 词只能用延续性动词。如果主句用否定式，其含义是“直 到……才……”, “在……以前不……”, 谓语动词可用瞬间动 词。例如: The young man read till the light went out. Let’s wait until the rain stops. We won’t start until Bob comes. Don’t get off until the bus stops. 2 2. 条件状语从句 (1)条件状语从句通常由if, unless引导。例如: What shall we do if it snows tomorrow? Don’t leave the building unless I tell you to. (2)在条件状语从句里，谓语动词通常用现在时态表示将来 的动作或状态。例如: I’ll help you with your English if am free tomorrow. He won’t be late unless he is ill. (3)“祈使句 + and (or)+ 陈述句” 在意思上相当于一个带 有条件状语从句的复合句。例如: Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late. Study hard and you will pass the exam. =If you study hard, you will pass the exam. 3. 原因状语从句 (1)原因状语从句通常由because, since, as引导。例如: He didn’t come to school because he was ill. As it is raining, we shall not go the zoo. Since you can’t answer the question, I’ll ask someone else. (2)because表示直接原因，语气最强。Because引导的原 因状语从句多放在主句之后。回答由why提出的问题，只能 用because。 3 As和since语气较弱，一般用来表示明显的原因。由as和 since引导的原因状语从居多放在句首。例如: ------Why aren’t going there? ------Because I don’t want to. As he has no car, he can’t get there easily. Since we have no money, we can’t buy it. (3)because和so不能同用在一个句子里。 4. 结果状语从句 (1)结果状语从句由so…that, such…that, so that引导。例 如: He is so poor that he can’t buy a bike for his son. She is such a good teacher that everybody likes her. My pencil fell under the desk, so that I couldn’t see it. (2)so…that语such...that可以互换。例如: 在由so...that引导的结果状语从句中，so是副词，与形容 词连用。其结构是: “...so + 形容词(副词)+ that + 从句”。 例如: He was so glad that he couldn’t say a word. The hall is so big that it can hold 2,000 people. Mother lives so far away that we hardly ever see her. 在由such…that引导的结果状语从句中，such是形容词， 它修饰的可以是单数或复数可数名词，也可以是不可数名 4 词;名词前面可以带形容词，也可不带。如果是单数可数名 词，前面需加不定冠词a或an。例如: It was such a hot day that nobody wanted to do anything. He had such long arms that he could almost touch the ceiling. He made such rapid progress that he did very well in the mid-term. 有时上述两种结构是可以互换的。例如: It was such a wonderful film that all of us wanted to see it again. =The film was so wonderful that all of us wanted to see it again. It is such an important match that nobody wants to miss it. =The match is so important that nobody wants to miss it. (3)如果名词前由many, much, little, few等词修饰时，只能 用so, 不用such。例如: Soon there were so many deer that they ate up all the wild roses. He has so little time that he can’t go to the cinema with you. 5. 比较状语从句 比较状语从句通常由as…as, 比较级 + than…等连词引 5 导。例如: Tom runs faster than John does. This classroom is as big as that one. 6. 目的状语从句 (1)目的状语从句通常由 so that, in order that引导。例如: We started early so that we could catch the first train. He studies hard so that he could work better in the future. We used the computer in order that we might save time. (2)so that既可引导目的状语从句，又可引导结果状语从 句。区别这两种从句的 办法 鲁班奖评选办法下载鲁班奖评选办法下载鲁班奖评选办法下载企业年金办法下载企业年金办法下载 有两个:1)目的状语从句里往往 带有情态动词can, could, may, might等。2)从意思上看，目 的状语从句往往表示的目的很明确。例如: Speak clearly so that they may understand you. (目的状语 从句) Jack is badly ill so that he has to rest. (结果状语从句) 7. 让步状语从句 (1)让步状语从句通常由although, though等连词引导。例 如: Though he is young, he knows a lot. Although I am tired, I must go on working. (2)although(though)不能用在同一个句子中。例如: 我们不能说:Though it was raining hard, but he still went 6 out. 应该说:Though it was raining hard, he still went out.或 It was raining hard, but he still went out. 8. 地点状语从句 地点状语从句常常由where来引导。例如: Go where you like. Where there is a will, there is a way. 【实例解析】 1. (2004年北京市海淀区中考 试题 中考模拟试题doc幼小衔接 数学试题 下载云南高中历年会考数学试题下载N4真题下载党史题库下载 ) You will stay healthy _______ you do more exercise, such as running and walking. A. if B. how C. before D. where 答案:A。该题考查的是引导状语从句的从属连词的选择。 从意思上看，从句应是一个条件状语从句，在这四个选项中 只有if能引导条件状语从句，所以选A。 2. (2004年江西省中考试题) ---Shall we go on working? ---Yes, _________ I prefer to have a rest. A. when B. if C. because D. though 答案:D。该题考查的是引导状语从句的从属连词的选择。 从意思上看，只有选though才能说得通。 3. (2004年徐州市中考试题) 7 None of us knew what had happened _________ they told us about it. A. when B. until C. after D. though 答案:B。该题考查的是引导状语从句的从属连词选择。 本句的意思是“在……以前我们没人知道这件事。”要表达着 一意思应用“not…until” 这一句型。 4. (2004年泉州市中考试题) ---I hope you’ll enjoy your trip, dear! ---Thank you, mum. I’ll give you a call _________ I get there. A. until B. as soon as C. since D. till 答案:B。该题考查的是引导状语从句的从属连词的选择。 本题的意思是“一到那里，我就给你打电话。”要表达这个意 思应选用as soon as。 状语从句在复合句中作状语，修饰动词、形容词或副词 等。状语从句可以表示时间、条件、原因、地点、目的、结 果、让步、方式、比较等意义。 知识梳理:提纲挈领，抓住重点和难点～ 各类状语从句连接词(短语)一览表: 时间 when, while, as, as soon as, since, until, after, before 条件 If, unless 原因 As, because, since 8 地点 Where 目的 So that, in order that 结果 So that, so…that, such…that 让步 though, although, even if, however 方式 As 比较 than, (not)as…as, 时间状语从句: Whenever he comes, he brings a friend. 他每次来都带个朋友。 条件状语从句: As long as I am alive, I will go on studying. 只要我活着， 我就要学习。 原因状语从句: Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。 地点状语从句: Put it where we can all see it.把它放在我们都能看到的位置。 目的状语从句: Finish this so that you can start another.把这个做完，你可以开始另一个。 结果状语从句: 9 He was so angry that he couldn't say a word. 他气得说不出话了。 让步状语从句: Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。 方式状语从句: Students do as the teachers say.学生们按照老师说的去做。 比较状语从句: The work isn't as easy as I thought.这项工作比我想象得难。 例题解析:举一反三，学的更轻松～ 易混引导词while, when, as的区别: when既可以指时间点,与瞬间动词连用，也可以指时间段，与延续性动词连用(=while)。如: When he came in, his mother was cooking. When (While) we were at school, we went to the library every day. While表示时间段,因此，while 从句的谓语动词要用延续性动词。如: Please don't talk so loud while others are working. As与when用法相似，但着重强调主句动作与从句动作同时发生，有随着……或一边……一边……之意。如:As you 10 get older, you get more knowledge.随着年龄的增长，你获得 的知识就越多。 2(Because,as,since 的区别: Because用于表示直接原因,回答why提出的问题，语气最 强;As用于说明原因, 着重点在主句，常译成由于;since 表示显然的或已知的理由或事实，常译成既然。如: Water is very important because we can't live without it. He didn't come yesterday as his mother was ill. I'll do it for you since you are busy. 3(such…that, so…that, so that 引导结果状语从句的区 别: such是形容词，修饰名词; so 是副词，修饰形容词或副词。 其结构如下: 1) such + a (n)+ 形容词+单数可数名词+that…… 2) such+形容词+复数可数名词+that …… 3) such +形容词+不可数名词+that……。如: This was such a good film that I went to see it several times. It was such good books that they sell well. It was such bad weather that I had to stay at home. He spoke so fast that I couldn't follow him. 11 He is such a lovely boy that we all like him. =He is so lovely a boy that we all like him. 注:在形容词+可数名词复数/不可数名词结构中，当名词 前有many, much, few, little表示数量的多少时，名词前用so。 如: She made so many mistakes that she didn't pass the exam. 练习与巩固:熟能生巧，取得好成绩～ 选择合适的连接词，完成下列句子。 1.Jim spends a lot of money on books______he is not rich. 2.Kate fell into sleep ______she was listening to the music. 3.----Is David at school today? ----No. He is at home ______he has a bad cold. 4.We won't have supper ______my mother comes back. 5.Speak to him slowly ______he may understand you better. 6. ______ she doesn't come on Sunday, I'll go fishing by myself. 7.It is four years ______I had left that small village. 8. ______the air moves, it is called wind. 9.We will go to the park ______it doesn't rain 12 tomorrow. 10.______little boys did ______much work. 11.There are few new words in the passage ______we can't understand it. 12.Go back ______you come from. 13.He reached the station ______the train had left. 14.----Do you have a swimming pool? ----No, we don't. At least, not ______big ______yours. 15.Give me your paper ______you have finished it. 16.It is raining hard, ______we have to stay at home. 17. ______you work harder, you'll never pass the final exam. 18.Look after te children ______I am out. 19.The village is ______far away ______I can't get there on foot. 20.That is ______an interesting book ______I can't stop reading it. Keys: 1.though 2.while 3.because 4.until 5. so that 6.Even if 7.since8.when 9.if10.Such, do 11.but 12.where 13.before14.as(so), as 15.after 16.so 17.unless 18.while 19.so, that20.such, that 篇二:时间状语从句 13 时间状语从句 定义: 用表示时间的连词连接一个句子作状语，这样的主从复合句就是时间状语从句。 连接时间状语从句的连接词有:when, before, after, while, as soon as, until, since...... 这里要注意一点的是，如果主句是一般将来时，从句只能用一般现在时表示将来意义。 时间状语从句 由when，while引导的时间状语从句。 When you think you know nothing, then you begin to know something.当你以为自己一无所知的时候，你就是在开始知道一些事物了。 Strike while the iron is hot. 趁热打铁。 You can feel the air moving as your hand pushes through it.当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke. 我们的校长边谈边笑。 主要时态:主现从不限;主过从四过;主将从现。 when, while和as的区别 (1)when引导的从句的谓语动词可以是延续性的动词，可以是瞬时动词。并且when有时表示“就在那时”。 例如:When she came in, I stopped eating.她进来时，我停止吃饭。(瞬时动词) 14 When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。(延续性的动词) We were about to leave when he came in.我们就要离开，就在那时他进来了。 (2)While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生(或者相对应)。并且while有时还可以表示对比。例如: While my wife was reading the newspaper, I was watching TV. (was reading是延续性的动词，was reading和was watching同时发生) 。 I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。(对比) (3)As表示“一边??一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生;as也可以强调“一先一后。例如: We always sing as we walk.我们总是边走边唱。(as表示“一边??一边”) As we were going out, it began to snow.当我们出门时，开始下雪了。(as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间) 由before和after引导的时间状语从句 15 注意:before引导的从句不再用否定式的谓语，并且当before引导的从句位于主句之后，有时译成“就，才”。还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在时;如果before引导的主句谓语用的是 过去完成时，则从句动词多用一般过去时，这样以便体现动作发生的先后。After表示主句动作发生在从句动作之后。主句和 从句的动作的时间关系正好与before引导的从句相反。例如: It will be four days before they come back. 他们要过四天才能回来。 Einstein almost knocked me down before he saw me.爱因斯坦几乎把我撞倒才看到我。 My father had left for Canada just before the letter arrived.我父亲恰好在信到之前去加拿大了。 They had not been married four months before they were divorced. 他们结婚还不到四个月就离婚了。 After you think it over, please let me know what you decide.你仔细考虑过以后，告诉我你是怎样决定的。 After we had finished the work, we went home.完成工作之后，我们回家了。(从句用过去完成时，主句用一般过去时) 由till或until引导的时间状语从句。 16 till和until一般情况下两者可以互换，但是在强调句型中多用until。并且要注意的是:如果主句中的谓语动词是瞬时动词时，必须用否定形式;如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。till不可以用在句首，而until可以放在句首。例如: I didn't go to bed until(till) my father came back. 直到我父亲回来我才上床睡觉。 It was not until the meeting was over that he began to teach me English.直到散会之后他才开始教我英语。 I worked until he came back.我工作到他回来为止。 I didn't work until he came back.他回来我这才开始工作。 Please wait until I arrived.在我到达之前请等我。 由since引导的时间状语从句。 since引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时。但在It is +时间+since从句的句型中，主句多用一般现在时。例如: I have been in Beijing since you left. 自从你离开以来，我一直在北京了。 Where have you been since I last saw you? 自上次我和你见面以后，你到哪里去了, It is four years since my sister lived in Beijing. 我妹妹不 17 在北京住有四年了。 It is five months since our boss was in Beijing.我们老板离开北京有五个月了。 ?由as soon as, 等引导的时间状语从句。(了解) 这些连词都表示“一??就”。例如: I will go there directly I have finished my breakfast. 吃完早饭，我立即到那里去。 The moment I heard the news, I hastened to the spot.我一听到消息，马上赶到了出事地点。 As soon as I reach Canada, I will ring you up. 我一到加拿大，就给你来电话。 注意:hardly(scarcely, rarely)?when / before, no sooner?than相当于as soon as之意。主句用过去完成时，从句用 一般过去时。当hardly, scarcely, rarely和no sooner位于句首时，主句应用倒装语序。例如: He had no sooner arrived home than he was asked to start on another journey. 他刚到家，就被邀请开始另一旅程。 No sooner had the sun shown itself above the horizon than he got out of bed to commence work.太阳刚从地平线上升起，他就起床劳动去了。 Hardly had I sat down when he stepped in.我刚坐下，他就 18 进来了。 He had hardly fallen asleep when he felt a soft touch on his shoulder.这个阿拉伯人刚要入睡就感到肩膀上被轻轻一触。 ?由by the time引导的时间状语从句。 注意时态的变化:在一般情况下，如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时;如果从句的谓语动词用一般现在时，主句的谓语动词用将来完成时。例如: By the time you came back, I had finished this book.到你回来时，我已经写完这本书了。 By the time you come here tomorrow, I will have finished this work. 你明天来这儿的时候，我将已经完成此工作了。 ?由each time, every time等引导的时间状语从句。 例如: Each time he came to Harbin, he would call on me. 他每次来哈尔滨，总是来看我。 Whenever that man says“To tell the truth”, I suspect that he's about to tell a lie.每当那个人说“说实在话”的时候，我猜想他就要说谎了。 You grow younger every time I see you. 每次遇到你，见你更年轻了。 ?由as long as和so long as引导的时间状语从句。 19 这两个连词表示“只要“例如: You can go where you like as long as you get back before dark. 你可以随意到哪里去，只要在天黑以前回来就行。 I will fight against these conditions as long as there is a breath in my body! 只要我一息尚存，我就要反对这种境况。 一、when“当??时”，引导时间状语从句时，从句用于表示主句动作发生的特定时间。如: The days get longer when spring comes. = When spring comes, the days get longer.春天到来时，白天变得更长了。 二、before“在??之前”，引导时间状语从句时，表示主句动作发生在从句动作之前。如: Close the door before you leave the room.离开房间前关上门。 三、after“在??之后”，引导时间状语从句时，表示主句的动作发生在从句的动作之后。如: I went to school after I finished my breakfast.吃完早饭后我就去上学了。 四、as soon as“一??就??”，引导时间状语从句时，表示主句动作紧接着从句动作发生。如: I’ll call you as soon as I get home.我一到家就给你打电话。 五、until, till“直到”，引导时间状语从句。当主句谓语动 20 词是延续性动词时，主句常用肯定形式;当主句谓语动 词是非延续性动词时，主句要用否定形式，即 “not?until/till?”意为“直到??才??”。如: I’ll wait here until/till the rain stops.我将在这里等着，直到雨停。 You can’t go home until/till you finish your work.直到你完成你的工作，你才能回家。 时态的呼应和从句的位置 状语从句的两手绝活——时态的呼应和从句的位置。请看: 第一点 时态呼应一般来讲，复合句都要遵循主、从句时态呼应规律，状语从句也不例外。即主句用现在时，从句也用现在时;主句用过去时，从句也用过去的某种时态。如: Be careful when you cross the road.过马路时要小心。 You must see the doctor if you are ill.如果你生病了，你必须去看医生 主句是一般过去时，从句也要用一般过去时。如: When he was seven years old, he could swim.当他七岁时就会游泳。 She turned off the light before she left the office.她离开办公室前就关了灯。 21 第二点 主从句的位置，大多数情况下，从句可以位于主句之前， 也可以位于主句之后。不过从句在前时，主从句之间必须用 逗号隔开。如: Please tell me when he comes back. = When he comes back, please tell me. 这是一般现在，一般过去，现在进行，过去进行，现在完 成，过去完成，现在完成进行，一般将来，过去将来时的时 间状语: 1.Often,usually----------动词原型do,does,am,is, are 2.yesterday,last Sunday,in the past-------动词过去式 did,was,were 3.now--------be+doing 4.while,at that time,-------was doing,were doing 5.since从句,for 2 days,------have done,have been +过去的某个时间点----had done,had been 7.与现在完成相似-------have been+持续动词ing形式 8.一切表示将来的时间状语，in+一段时间-------将来要发 生的一般性动作, will,shall+原型 9.与一般将来时相似-----------would+原型 时间状语 22 一般现在时every?, sometimes, at ?, on Sunday, 一般过去时yesterday, last week, an hour ago, the other day, in 1982, just now 一般将来时next?, tomorrow, in+时间, 现在完成时 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently 过去完成时before, by, until, when, after, once, as soon as 过去进行时this morning, the whole morning, all day, yesterday, from nine to ten last evening? when, while 将来 进行时soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening 从句语法 时间状语 在复合句中，担任状语成分的从句称为状语从句。时间状 语从句说明主句动作发生或进行的时间。状语从句由连词引 导，其位置通常可以放在句首或句末。放在句首是，常用逗 号与主句分开;放在句末时，从句前面往往不加逗号。 引导的时间状语从句的主从复合句中，动作发生在先的用 过去完成时，在后的用过去时。表示前面的叙述所没有提到 过的信息。它总是对所描述的事件予以引人注目的强调，意 为“这时;突然”;当位于句末的分句具有引种用法时，大致 有以下三种情况: 23 A. when 分句前面的分句使用过去进行时。如: (1) He was still smiling when the door opened and his wife came in. 他正笑着的时候，门突然 开了，他妻子走了进来。 (2) I was thinking of this when I heard my name called. 我正想着这件事时，突然听到有人叫我 的名字。 B. when 分句前面的分句使用 was (were) about to， was (were) on the point 等。如: (1) We were about to start when it began to rain. 我们刚 要出发就开始下雨了。 (2) He was on the point of leaving when someone knocked at the door. 他刚要走就有人敲门。 C. when 分句之前的分句用过去完成时，其中 sb had hardly / scarcely /barely ? when 已成为固 定词组。如: (1) We had hardly fallen asleep when the bell rang. 我们 刚刚入睡，铃声就响了起来。 (2) He had scarcely arrived when he had to leave again. 他刚刚到达就又要离开了。 表示条件，相当于 if ，引导条件状语从句。如: How can I get a job when I can't even read or 24 write, 如果我连读和写都不会，我怎么能找到 工作呢, 篇三:时间状语从句讲解1 1.when“当……时”，引导时间状语从句时，从句用于表示主句动作发生的特定时间。如: The days get longer when spring comes. = When spring comes, the days get longer. 春天到来时，白天变得更长了。 2.While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生(或者相对应)。并且while有时还可以表示对比 注意:while 引导的从句中谓语动词必须是持续性的，不能是短暂性的 3.before“在……之前”，引导时间状语从句时，表示主句动作发生在从句动作之前。如: Close the door before you leave the room. 离开房间前关上门。 4.after“在……之后”，引导时间状语从句时，表示主句的动作发生在从句的动作之后。如: I went to school after I finished my breakfast. 吃完早饭后我就去上学了。 5.as soon as“一……就……”，引导时间状语从句时，表示 25 主句动作紧接着从句动作发生。如: I’ll call you as soon as I get home. 我一到家就给你打电话。 6.until, till“直到”，引导时间状语从句。当主句谓语动词 是延续性动词时，主句常用肯定形式;当主句谓语动词是非 延续性动词时，主句要用否定形式，即“not…until/till…”意 为“直到……才……”。如: I’ll wait here until/till the rain stops. 我将在这里等着，直到雨停。 You can’t go home until/till you finish your work. 直到你完成你的工作，你才能回家。 7. since 表示自从 通常是现在完成时 8. as 当主句. 从句动作同时发生，从句动作的时间概念淡 化，而主要表示主句动作发生的背景或条件只能是as 为 一 边 一边 As the weather went on the weather got worse 下面再向大家透露点儿内幕消息，状语从句的两手绝活 ——时态的呼应和从句的位置。请看: 一、时态呼应 一般来讲，复合句都要遵循主、从句时态呼应规律，状语 从句也不例外。即主句用现在时，从句也用现在时;主句用 过去时，从句也用过去的某种时态。如: Be careful when you 26 cross the road. 过马路时要小心。 You must see the doctor if you are ill. 如果你生病了，你必须去看医生。 主句是一般过去时，从句也要用一般过去时。如: When he was seven years old, he could swim. 当他七岁时就会游泳。 She turned off the light before she left the office. 她离开办公室前就关了灯。 二、主从句的位置。 大多数情况下，从句可以位于主句之前，也可以位于主句 之后。不过从句在前时，主从句之间必须用逗号隔开。如: Please tell me when he comes back. = When he comes back, please tell me.1. when、 as、 while引导的时间状语从 句 分析 定性数据统计分析pdf销售业绩分析模板建筑结构震害分析销售进度分析表京东商城竞争战略分析 : (1) when引导时间状语从句时表示“当??的时候”， when既可以指时间段也可指时间点， 从句中既可用延续性动词 又可用非延续性动词， 且动作既可和主句的动作同时发生 又可在主句的动作之前或之后发生， 注意体会如下例句: I’ll call you when I get there. 我一到那里就给你打电话。 When the wind blows, all the doors rattle. 只要风一吹， 这门就吱嘎作响。 27 He stopped trying, when he might have succeeded next time. 他不再试了， 其实他可能下一次就成功。When I came home my wife was cooking dinner. 我回家时， 妻子在做晚饭。 如果when引导的时间状语从句的主语与主句主语相同， 而从句的谓语又是be动词时， 那么从句中的主语和be可以省略; 当when引导的时间状语从句的主语与主句主语相同时， 往往还可以用“when，分词”的形式替代该状语从句。例如: When (you are) in trouble, ask her for help. 当你遭遇麻烦的时候去向她求助。 When I came into the room(=When coming into the room), I found him lying there asleep. 当我进入房间的时候， 我发现他躺在那儿睡着了。 (2) while引导时间状语从句时表示“当??的时候”， 它强调主句的动作与从句的动作同时持续地进行， 用于这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词， 或者主句的动作发生在从句动作的进行过程中， 主句中的谓语动词通常是非延续性动词， 例如: Study while you study; play while you play. 该学习的时候就学习， 该玩的时候就玩 I met her while I was at school. 当我在学校的时候我遇见了她。 28 (3) as引导时间状语从句时表示“当??时， 一边??一边??”， 侧重表示两个动作同时发生(包括一个主语同时进行两个动作)， 或者一种动作随着另一种动作的变化而变化。例如: He jumps as he goes along. 他边走边跳。 I slipped on the ice as I ran home. 我跑回家时在冰上滑了一跤。 I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。 As the wind rose the noise increased. 刮风的时候噪声增大。 2. before和after 引导的时间状语从句分析: before引导时间状语从句时表示主句的动作发生在从句动作之前， after引导时间状语从句时表示主句的动作发生在从句动作之后。例如: See me before you leave. 在你离开之前来见我。 Before they drive any of the buses, they will have to pass a special test. 在驾驶公共汽车之前， 他们必须通过专门测验。 I saw them after I arrived. 在我抵达之后， 我见到了他们。 I found his pen after he has left. 在他走后， 我找到了他的笔。 29 3. till和 until 引导的时间状语从句分析: till和 until这两个词作连词和介词时的意义和用法相同， 一般可以换用(放在句首时通常用until的形式， till在口语中更为常见)。till和 until引导时间状语从句时跟主句里肯定形式或否定形式的、 表示延续性动作的谓语动词连用表示”到??为止”， 跟主句里否定形式的、 表示非延续性动作的谓语动词连用表示“直到??才(开始)”， 例如: Walk till you come to a white house. 一直走到一座白房子为止。 We didn’t discuss the problem until he came back. 我们一直等到他回来后才讨论问题。 4. since引导的时间状语从句分析: since引导的时间状语从句表示“自从??以来”， 其用法主要有两种: (1) 现在完成时的主句，since引导的一般过去时态的时间状语从句。例如: He hasn’t been home since he graduated. 他毕业后没回过家。// They have been friends ever since they were in grade school. 他们从小学起就一直是好朋友。// What have you been doing since I last saw you? 自我上次和你见面以后， 你在做什么, (2) It be(主句中谓语用一般式和用完成式区别不大， 后者更具强调意味)，表示一段时间的词汇，since引导的时间状 30 语从句。例如: It is two years since I became a postgraduate student. 我成为研究生已经有2年了。It was three years since we had been there. 我们在那儿已呆了三年。 注意: since做介词时也表示“自从??以来”， 其具体用法有两种情况: (1) since，表示过去某个时间点的词汇(如具体的年、 月、 日期、 钟点)。 例如: They have been friends since childhood. 他们从幼时起一直是好朋友。She’s been skiing since childhood. 她从幼时起就开始滑雪。I have been there many times since the war. 自那次战争以来， 我曾去该地多次。 (2) since，表示一段时间的词汇，ago。 相关热词搜索:状语 从句 初中英语 时间 ppt 初中英语时间状语从句 时间状语从句ppt 31