(完整版)状语从句讲解
状语从句
定义：
在句中作状语的从句是状语从句，修饰主句中的动词、形容词或副词等。状语从句由从属连词引导，从属连词在句中不充当句子成分，只起连接作用，状语从句放在句首时，要用逗号，放在句尾时不用。
状语从句主要用来修饰主句或主句的谓语。一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。
尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词
和特殊的连接词即考点。现分别列举如下:
一、时间状语从句
1.when, while和as的用法
(1)when既可引导一个持续动作，也可引导一个短暂性动作.when强调主从句动作的发生有先后。如：
①When he got there, the classroom had been cleaned.
他到的时候，教室已打扫过了。(主句动作发生在从句动作之前)
②He went to play football when he finished his homework.
做完作业后他就去踢足球了。(主句的动作发生在从句动作之后)
when可作并列连词用，相当于just then，at the time，前一分句多用进行时、be about to或be on the point of doing，表示“正在做..，就在这时发生了另外一件事”或“届时”。如：
①I was reading when he suddenly came in.
②I was about to leave when the telephone rang.
(2)while强调主句动作发生在从句动作所发生的时间段内，从句的动作必须是延续性动词。如：
①Strike iron while it’s still hot.
②Will you please take care of my house while I was away?
在这一情况下，从句的动作一定是延续性动词，如果是非延续动词，要用when。如：
①Will you please take care of my house when I went away?
②当我进来的时侯，他在和别人说话。
While I came in, he was talking with others.
When I came in, he was talking with others.
(3)as引导一个持续性动作，强调主从句的动作同时发生，有“一边..一边..”的意思，也可说明两种正在发展或变化的情况，有“随着..”的意思。如：
①He sang as he walked.他边走边唱。
②As he gets older, he gets more open.
随着年龄的增长，他越发开朗起来。
2.as soon as, the moment, the minute, the second, the instant, no sooner...than, hardly/scarcely...when...，immediately, directly, instantly的用法。
这些从属连词引导的从句都表示从句的动作一发生，主句的动作随即就发生，常译为“一……就……”，The moment she arrives，we can start.
No sooner had we arrived at the station than the train left.
The boy burst into tears immediately he saw his mother.
3.till, until和not...until的用法
(1)在肯定句中，主句谓语动词必须是延续性动词，意为“某动作一直延续到某点才停止”。
You may stay here till/until the rain stops.
你得在这里呆到雨停。
(2)在否定句中，主句谓语动词必须是非延续性动词，从句为肯定式，意为“某动作直到某时间才开始”。He won't go to bed till (until) she returns.
直到她回来他才睡。
(3)not...until句型中的强调和倒装说法。
It was not until you told me that I had any idea of it. (强调句型)
Not until you told me did I have any idea of it. (not until 置于句首，主句要倒装)
Not until he came back did he find his house had been broken into.
4.before和since的用法
(1)连词before表示“还未……就……”，“不到……就……”，“……才……”，“趁还没来得及……”。Before they reached the station, the train had gone.
We hadn't run a mile before he felt tired.
Please write it down before you forget it.
(2)before的句型：It will be＋时间段＋before从句，表示“多久之后才……”。
It will be half a year before I come back.
It won't be long before we meet again.
(3)since的句型：It is/has been＋时间段＋since从句。若从句谓语为非延续性动词，表示“自从……有多久”；若从句的谓语为延续性动词，表示“自从结束/完成……起有多久”。
It is three years since the war broke out.
It is three years since he lived here.
二．地点状语从句
1.地点状语从句可用where, wherever, anywhere, everywhere等引导。地点状语从句可用于主句之前或之后。
You are free to go wherever you like.
Where there is a will, there is a way.有志者，事竟成。
Wherever there is smoke, there is a fire.
无火不生烟(既无风不起浪)。
2.注意区分引导的定语从句与状语从句。
where引导的地点状语从句直接修饰动词，而在定语从句中where作为关系副词要跟在表示地点的先行词后面。
You'd better make a mark where you have any questions.(状语从句)
You'd better make a mark at the place where you have any questions.(定语从句)
三．原因状语从句
1.引导原因状语从句的从属连词有：because, as, since, now that, seeing that, considering that等，每个连词的含义不尽相同。
(1)because用来回答why的提问，语气最强，一般放在主句之后；
(2)since表示既然或已知的理由，稍加分析即可表明的原因，多放在句首；
(3)as多用于口语，语气比because，since弱，表示的理由是明显的或被认为是已知的，是对主句的附带说明，重点在主句，可放在句首或句尾，放在句尾时，as可省略。
I can’t go，(as) I am busy.
(4)considering that, seeing that, now that和since的意义相似，都有“鉴于某个事实”的意思，that 可以省去。
As it is raining, we shall not go to the park.
Now that/Since everybody is here, let's begin our meeting.既然大家都到了，我们就开始我们的会议。
My friends dislike me because I’m handsome and successful.
Now that everybody has come, let’s begin our conference.
四．目的状语从句
引导目的状语从句的从属连词有：so that, in order that, for fear that，in case, lest等。
1.in order that与so that
两个连词都意为“以便……，为了……”，引导的状语从句中需用情态动词；in order that比so that正式，引导的状语从句可置于主句之前或之后，而so that引导的从句只能置于主句之后。
I'll speak slowly so that you can understand me.
In order that we might see the sunrise, we started for the peak early.
The boss asked the secretary to hurry up with the letters so that he could sign them.
2.for fear that, in case与lest这些从属连词本身带有否定意义，意为“以免，以防”，相当于so that...not...或in order that...not...
The boy hid himself behind the tree in case/for fear that his father should see him.
Take your raincoat in case/lest it should rain.
五．结果状语从句
1.引导结果状语从句的从属连词有：so that, so...that...，such...that...。其结构形式为：
Mike is so honest a worker that we all believe him.
＝Mike is such an honest worker that we all believe him.
He earned so little money that he couldn't support his family.
He got up so early that he caught the first bus.
It’s such a good chance that we must not miss it.
区别so...that和such...that的用法
名前such，形、副so，that从句跟在后；多多少少必用so，特别注意是little；“小”用such，“少”用so。
六．条件状语从句
常用引导词：if, unless,
特殊引导词：as/so long as, only if, providing/provided that, supposing that, in case that, on condition that
We’l l start our project if the president agrees.
You will certainly succeed so long as you keep on trying.
Provided that there is no opposition, we shall hold the meeting here.
七、方式状语从句：
引导方式状语从句的从属连词有：as, as if, as though等。方式状语从句应放在主句之后。as引导方式状语从句，意为“按照，正如”；其中as if或as though引导的从句一般用虚拟语气，但如果从句中所陈述的情况很可能实现，也可用陈述语气。
Do as you are told to, or you'll be fired.
The old lady treats the boy as if he were her own son.
When in Rome, do as the Roman do.
She behaved as if she were the boss.
八．让步状语从句
1.although/though, even though/if引导让步状语从句
although与though两者意思相同，一般可以互换，都可以与yet, still或nevertheless连用，但不能和but 连用。
He is unhappy though/although he has a lot of money.
尽管他很有钱，但是他不幸福。
Even though/if it is raining, we'll go there.
2.as引导让步状语从句
as从句一般放在主句之前，用倒装语序。从句中的表语或状语或动词原形置于句首。若表语是名词，前置时要省略冠词。
Child as he is, he knows a lot.
尽管他是孩子，他却懂得很多。
Much as I like it I won't buy it, for it's too expensive.
虽然我很喜欢，但我不会买的，因为它太贵了。
Try as he might, he could not find a job.
不管他怎样努力，他还是找不到工作。
3.疑问词＋ever, no matter＋疑问词与whether...or... 引导让步状语从句
Whether you believe it or not, it is true.
无论你信不信，它是真的。
Whatever(＝no matter what) you say, he won't believe you.无论你说什么，他不会信你。
Whoever you are (＝no matter who you are), you must obey the rules.无论你是谁，你必须服从这些规则。九．比较状语从句
常用引导词：as(同级比较), than(不同程度的比较)
特殊引导词：the more … the more … ; just as …，so…; A is to B what /as X is to Y; no … more than; not A so much as B
She is as bad-tempered as her mother.
The house is three times as big as ours.
The more you exercise, the healthier you will be.
Food is to men what oil is to machine. 食物之于人，犹如油之于机器。
He runs less fast than me.
The film was not so(as) good as I had expected.
The busier he is, the happier he feels.
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高中英语状语从句讲解汇总
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初中英语状语从句解析版汇编含解析 一、初中英语状语从句 1．_______it’s a public holiday today, some firefighters in our city are still on duty. A．Although B．Once C．If 【答案】A 【解析】 【详解】 句意“尽管今天是公共节假日，但是我们城市的一些消防员仍然在岗位值班”。A.尽管（引导让步状语从句）；B.一……就……（引导时间状语从句）；C.如果（引导条件状语从句）。根据句意可知，今天是公共假日，本应该休息，但是消防员仍然在岗值班，表示让步，故选A。 2．— _______ good time we had at the party last night! — Yes. It was _______exciting party that I would never forget it. A．What; so B．How; such C．What a; such an D．How a; so an 【答案】C 【解析】 【详解】 试题分析：句意：昨天晚上我们在聚会上玩的是多么开心呀！是的，它是如此的令人兴奋以至于我永远不会忘记它。 第一句为感叹句，是对 a good time表示感叹，time为名词，所以用what来引导，第二句考查such+a/an+adj+n.+that句型结构，表示“如此……的一个东西……以至于”，故选C。 3．-Have you improved your spoken English？ -Not yet．I'll try my best______I am not good at it now． A．so B．although C．but D．until 【答案】B 【解析】 【详解】 句意：——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．考查连词辨析。A. so所以；B. although 虽然；C. but但是；D. until直到。根据语境推测句意是——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．在这里两个句子之间存在一个相反的让步关系，though/although/even though“虽然；尽管”，引导让步状语从句，故选B． 【点睛】 本题主要考查连词的用法，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．前后句之间是让步关系．
高中英语状语从句讲解和练习(含答案)
t 状语从句讲解和练习 状语修饰动词、形容词、副词或整个句子。通常由副词、介词短语、动词不定式、分词和从句等担当 。例如： 1. Naturally , our grandparents were pleased to get our phone call . (副词) 2. We worked hard , from sunrise to sunset . (介词状短语) 3. To help my disabled aunt , I spend an hour working in her house every day . (不定式) 4. Seen from a distance , the farmhouse looked deserted . (过去分词) 5. I know how to light a camp fire because I had done it before .（原因状语从句） 状语的位置比较灵活，可以位于句首、句末或句中。enough用作状语修饰形容词和副词时必须后置。 状语从句主要用来修饰主句或主句的谓语。一般可分为九大类，分别表示时间、地点、原因、目的、 结果、条件、让步、比较和方式。尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解 和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词 和特殊的连接词即考点。现分别列举如下: 1．时间状语从句 常用引导词：when, as, while, as soon as, while, before, after, since , till, until 特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , dire ctly, no sooner … than, hardly …when, scarcely … when I didn’t realize how special my mother was until I became an adult. While John was watching TV, his wife was cooking. The children ran away from the orchard(果园) the moment they saw the guard. No sooner had I arrived home than it began to rain. Every time I listen to your advice, I get into trouble. 2．地点状语从句 常用引导词：where 特殊引导词：wherever, anywhere, everywhere Generally, air will be heavily polluted where there are factories. Wherever you go, you should work hard. 3．原因状语从句 常用引导词：because, since, as, since 特殊引导词：seeing that, now that, in that, considering that, given that, considering that, My friends dislike me because I’m handsome and successful. Now that everybody has come, let’s begin our conference. The higher income tax is harmful in that it may discourage people from trying to earn more. Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable. 4．目的状语从句 常用引导词：so that, in order that 特殊引导词：lest, in case, for fear that，in the hope that, for the purpose that, to the end that The boss asked the secretary to hurry up with the letters so that he could sign them. The teacher raised his voice on purpose that the students in the back could hear more clearly. 5．结果状语从句 常用引导词：so … that, so… that, such … that, 特殊引导词：such that, to the degree that, to the extent that, to such a degree that, He got up so early that he caught the first bus. It’s such a good chance that we must not miss it. To such an degree was he excited that he couldn’t sleep last night.
高中英语状语从句讲解
高中状语从句讲解+练习 状语通常由副词、介词短语、动词不定式、分词和从句等担当。例如： 1. Naturally , our grandparents were pleased to get our phone call . (副词) 2. We worked hard , from sunrise to sunset . (介词状短语) 3. To help my disabled aunt , I spend an hour working in her house every day . (不定式) 4. Seen from a distance , the farmhouse looked deserted . (过去分词) 5. I know how to light a camp fire because I had done it before .（原因状语从句） 状语从句主要用来修饰主句或主句的谓语。一般可分为九大类，尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。现分别列举如下: 1．时间状语从句 常用引导词：when, as, while, as soon as, while, before, after, since , till, until 特殊引导词：the minute, the moment, the second, the instant, immediately , directly, every time, the day，no sooner …than, hardly …when, scarcely …when （1）Tell him I need to see him the minute he arrives. 他一到就告诉他我要见他。 （2）The children ran away from the orchard(果园) the moment they saw the guard. The moment he saw me, he ran away. 他一看见我，就跑了。 He said he’d call you the moment he got home. 他说他一到家就给你打电话 （3）The instant I saw him, I knew he was the man from the restaurant. （4）Immediately you begin to speak, he gives you his full attention.你只要一开始说话，他就全神贯注地听。 （5）My sister came directly she got my message. 我妹妹一收到我的信息就来了。 （6）Every time I listen to your advice, I get into trouble. （7）no sooner... than... ，"一...就..." ，引导时间状语从句,主句用过去完成时,"than"后面的从句用一般过去时.(从这里可以知道,no sooner后面是主句;than后面是从句) 例: I had no sooner reached home than it began to rain. 我一到家天就下起雨来 No sooner ...than...常放在句首,表示强调.这时主句要倒装. 例:No sooner had I reached home than it began to rain. （8）He had hardly sat down when the telephone rang.他刚坐下电话就响了。 He had scarcely sat down when there was a knock at the door. 他刚坐下就有人敲门 另外，如果把hardly放于句首，主句要用倒装结构。如： Hardly had I finished eating when he came in. 我刚吃完他就进来了。 2．地点状语从句 常用引导词：where 特殊引导词：wherever, anywhere, everywhere Generally, air will be heavily polluted where there are factories. She was standing exactly where you are standing now那时他就站在你现在站的地方。 Stay where you are.呆在原地别动。 Wherever you go, you should work hard. Sit anywhere you like 随便坐吧 3．原因状语从句
高中英语状语从句讲解及练习
状语从句 状语从句在句中作状语,可分为:时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。 一、时间状语从句 引导时间状语从句的连词有:when, as, while, until, not…until, before, after, since, the minute, the moment, each( every, next, the first time等。时间状语从句中一般用一般现在时或一般过去时。 1.When , while, as都可解释为“当```的时候”但侧重点有所不同。 1When Eg: When I arrived home , I had a little rest. 注意点: when 从句的主语与主句主语相同,谓语动词是be 动词时,从句主语和be可以省略。 Eg: When (she was walking along the street, she met her class teacher. 2As As 除了表示“当```的时候”,还可表示为“一面```一面”,“随着” Eg: He sang as he danced.(一面```一面 You will grow wiser as you grow older.(随着 3While表示“当```的时候”强调主句的动作和从句的动作同时发生,从句一般 用进行时,从句动词必须是延续性动词。
Eg: While we were working, they were having a rest. While (they were having a discussion, they got very confused. 注意点: while 有对比的含义,解释为“然而”。 eg: I prefer black tee, while he likes coffee. 2.until, not…until表示“直到```才”,在肯定句中主句常用延续性动词;在否定句中主句常用短暂性动词。 肯定句:I waited until midnight. 否定句:I did not leave until midnight. 注意点: 1not until…在句首,主句用倒装 eg: Not until you had explained how did I manage to do it. 2 It is not until…that…引导的强调句 It was not until it was dark that he came back. 3. the minute, the moment, each time都可表示“一```就```” eg: The worker recognized the type of the machine the moment he saw it. 注意点: the minute, the moment, each ( every, next, the first time作连词不和when 连用。 4.Hardly/scarcely…when, no sooner…than, as soon as表示为“一```就```”
高中英语状语从句用法详解
状语从句用法详解 内容提要： 一、时间状语从句 二、地点状语从句 三、方式状语从句 四、程度状语从句 五、原因状语从句 六、结果状语从句 七、目的状语从句 八、条件状语从句 九、让步状语从句 十、比较状语从句 一、时间状语从句: 1、时间状语从句通常用下列从属连词来引导：after, before, as, once, till, until, (ever) since, when, whenever, while, now (that), as long as, as soon as。如： Now (that)you’ve gr own up, you must stop this childish behaviour. Whenever we met with difficulties, they came to help us. Come and see us whenever you have time. People do not know the value of health till they lose it. 2、有些词，如immediately, directly, instantly 等，当用于as soon as 意义时，也可以引导时间状语从句，如：
I got in touch with him immediately I received his letter. My sister came directly she got my message. The machine will start instantly you press the button. I’ll t elephone you directly I hear the news. Will you look for it immediately you get there? 3．某些表示时间的名词词组，如the (very) moment ( = as soon as ), the minute ( = as soon as ), the instant ( = as soon as ), the day, the year, the morning, every time, each time, next time, the first time 等，也可以引导时间状语从句，如： I’ll tell you about it the moment you come. I started the instant I heard the report. The instant she saw him she knew he was her brother. Every time I catch a cold, I have pain in my back. I’m going to see him next time he comes to Shenzhen. He left Europe the year World WarⅡbroke out. He had impressed me that way the first time I met him. I started the very moment I got your letter. I’ll tell him the minute (that) he gets here. 4．有些关联从属连词，如no sooner …than / hardly …when / scarcely …when / barely …when 等，也能引导时间状语从句。 △如果把no sooner, hardly, scarcely, barely 置于句首，它所连带的这部分就要倒装，如：
高考英语状语从句讲解
典型例句突破状语从句 前言：学习状语从句的几个关键点1）引导状语从句的连词及意思2）状语从句与主句的时态照应3）有关状语从句的重点句型。4）状语从句的省略 一．各种状语从句的典型例句 1．条件状语从句： 1）Let'sgooutforawalkunlessyouaretootired.(除非,若不；相当于if—not) 即：Ifyouaretootired,we’llnotgooutforawalk. 2）Youmayborrowmybookaslongasyoukeepitclean.(只要，表示条件的唯一性) 3）Takeyourumbrellaincaseitrains.（以防—，以免—） 4） 5） 6）假如, 7） 2. 1） 2） 动词， 3） 4） 5） 6） 7） 8） 9） 动词) 10） ，etc.) 14)AssoonasIreachCanada,Iwillringyouup.(一—-就—) 15)Hehadnosoonerarrivedhomethanhewasaskedtostartonanotherjourney.(一—-就—,另外有hardly/scarcely—-when—) 16)Bythetimeyoucameback,Ihadfinishedthisbook.(“到—时为止”，从句是一般过去时，主句是过去完成时。) 17)Bythetimeyoucomeheretomorrow,Iwillhavefinishedthiswork.(“到—时为止”，从句是一般现在时，主句是将来完成时。) 18)EachtimehecametoHarbin,hewouldcallonme.(“每当—的时候”或“每次”，复习eachtime,everytime和whenever) 3．有关时间状语从句的重点句型
高中英语状语从句讲解及练习
状语从句 在复合句中作状语，位置灵活。 状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。 （一）时间状语从句 1.when, as, while a.when表时间，从句既可以用延续性动词，又可以用瞬间动词。 Eg: When I get there I will call you. 如果when引导的时状的主语与主句的主语相同，而从句的谓语又是be动词时，那么从句中的主语与be 可省。 Eg：When （you are）in trouble, you can ask her for help. 如果when引导的时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。Eg：When I came into the room(When coming into the room), I found the light was off. b.while表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。主句的谓语动词 通常是非延续性动词。 Eg: He came in while I was reading a book. I met her while I was in school. c. as表时间，与when相似，但侧重强调主从句动作同在时间点或同时间段进行。同时可表示主句的动作随着从句的动作的变化而变化。 Eg: He jumps as he sings. As the wind rose, the noise increased. 2.before(在……之前)与after（在……之后） Eg：See me before you leave. I saw them after I arrived. 3. till与until 肯定形式表示的意思是"做某事直至某时"。否定形式表达的意思是"直至某时才做某事"。 Eg: Wait till/untill I call you. 等着直到我叫你。 She didn't arrive till/until 6 o'clock.. 她直到6点才到 但是置于句首时只可用untill. Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。否定形式有另外两种表达方式： (1)Not until …在句首，主句用倒装。 Man did not know what heat was until the early years of the 19th century. =Not until the early years of the 19th century did man know what heat was. (2)It is not until…that… He will not go to bed until his mother comes home. =It is not until his mother comes home that he will go to bed. 4. as soon as/the moment/the instant/the second/the minute/immediately和hardly/scarcely…when, no sooner…than a. as soon as/the moment/the instant/the second/the minute/immediately 表示主句和从句的动作同时发生。译为“一……就” Eg：As soon as she heard the news, she began crying. b. hardly/scarcely…when, no sooner…than都可以表示"一……就……"的意思，但主句谓语动词一般要用过去完成时，从句谓语动词要用一般过去时。 Eg：I had hardly / scarcely got home when it began to rain. I had no sooner got home than it began to rain.注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构：Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain。 1. We called the First - Aid Center_______ the traffic accident happened. A. immediately B. shortly C.quickly D. hurriedly 2. The roof fell _____he had time to dash into the room to save his baby. A. before B. as C. after D. until 3. A good storyteller must be able to hold his listeners’ curiosity he reaches the end of the story. A when B whenever C.after D.until 4. I had just started back for the house to change my clothes _______ I heard the voices. A. as B. for C. while D.when 5. ______ the day went on, the weather got worse. １
高中英语状语从句讲解及配 套练习
状语从句 状语从句在句中相当于副词做状语, 又叫副词性从句。状语从句分为时间状语从句、条件状语从句、地点状语从句、原因状语从句、目的状语从句、让步状语从句、结果状语从句和 比较状语从句。掌握状语从句应当从引导词入手，注意引导词的词义,引导状语从句的引导词都有词义，所以，了解引导词的意思尤为重要。引导词按意义分为九类: 1）时间 when , as , while , till , until , before , after , since 2）地点 where 3）原因 because , as , since , now that 4）条件 if , unless , once . so （as） long as . in case 5）让步 though , whatever （--ever ） as , even though , even if 6）目的 so that , in order that 7）结果 so ... that 8）比较 than , as .. as 9）方式 as , as if 一、时间状语从句引导时间状语从句的连接词除上述外还有： 1）till, not … until …, until, before, since Don’t get off the bus until it has stopped. He waited for his father until（till）it was twelve o’clock. It will be five years before he returns from England. 常用句型：It is/was/will be …before…要过多久才…… It isn’t /wasn’t/won’t be…before…没有多久就…… It will be another five days before we finish this task. It is not long before I forgot it all. 2）hardly / scarcely … when, no sooner … than, as soon as, once表示“一……就” 3）directly, immediately, the moment, the minute that… 一……就 He made for the door directly he heard the knock. 4）each time, every time, by the time（到……为止） Each time he came to my city, he would call on me. 注意：表示未来情况，主句用将来时，从句用现在时。 二、让步状语从句 （1）although与though可以引导让步状语从句，不能与but连用，但可以与yet连用。 Although they are poor,（yet）they are warm-hearted. （2）even if或even though引导让步状语从句，表示“即使”，“纵然”，用来使人注意下文所强调内容的性质。
第五讲-高中英语状语从句详解
状语从句 一：状语从句的定义、功能、分类 定义：在复合句中作状语的从句 功能：状语从句在主从复合句中修饰主句中的动词，形容词或副词，或整个主句 分类：按意义可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。位置：从句的位置放在句首，也可放在句末。放在句首时，从句后面常用一个逗号，放在句末时，从句前一般不用逗号。 二：考点与难点 1、各种从属连词的含义及用法比较； 2、no matter wh- 与wh-ever 引导的从句的区别； 3、状语从句的时态问题； 4、状语从句倒装及省略； 5、状语从句与其它从句的区别。三：九种常见状语从句用法 1. 时间状语从句 引导时间状语从句的从属连词 1）.基本类：before、after、when、while、as、since、till、until、once, as soon as, etc. 2）. 名词类 the moment ,the minute, the second, the instant,etc. (一…就…); every time, each time, the last time, the first time, the day, the year, the morning etc. 3）. 副词类：immediately, directly, instantly, etc. (一...就...) 4）.句型类：no sooner…than…, hardly/scarcely…when…, etc. (一…就…) 注意：1. when, as, while When ①when表示时间点时，从句中用短暂性动词；表示时间段时，用持续性动词。Eg:. When they were still talking and laughing, the teacher came in. （when表示段时间） 2). He waved a hello when he saw her.（when表示点时间） ②. 可用作并列连词，其意义为“这时,突然”，相当于and then suddenly。常用于下列句式： be doing / be about to do sth/ be on the point of doing / have/had done + when Eg.1). I was about to go out when the door bell rang. 2). One evening I was having my dinner when an unexpected friend knocked my door. ③. 还可以表示原因,意思是“既然”，相当于since; considering that Eg. 1). It was foolish of you to take a taxi when you could easily walk there in five minutes . 2). How can he get good grades when he won't study? While ①while通常表示一段时间，从句中常用持续性动词作谓语。 Eg: Strike while the iron is hot. 趁热打铁。 ②while有时可以作并列连词，表示对比，可译成“然而……”。 Eg: 1). I am fond of English while he likes maths. ③while有时可引导让步状语从句，意思是“虽然”。 Eg. While they love the children, they are strict with them. As ①表示一边……一边……，强调从句和主句中两个动作交替进行或同步进行。 eg: She is singing a song as she took a bath. ②as表示随着 eg: As time goes on, it's getting warmer and warmer. 2. till, until和not…until 1）until /till用于肯定句时，表示直到…为止，主句必须为持续性动词。