八年级条件状语从句讲练
引导条件状语从句的连接词主要有：if(如果）、unless（除非）或 as long as（只要）等。unless在意思上等于if...not。
一、条件状语从句用法
1、引导条件状语从句最常用的连词是if,由if引导的条件状语从句表示在某种条件下某事很可能发生。如:
If you ask him, he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam, you will let him down.如果你考试不及格,你会让他失望的。
另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。
如: If I were you, I would invite him to the party.如果我是你,我会邀请他参加聚会。2、unless = if...not. 除非,若不,除非在……的时候
例如：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.
Unless it rains, the game will be played.除非下雨,比赛将照常进行。
3、so/as long as只要
例句;You may borrow my book as long as you keep it clean.
只要你保持书的清洁，你就可以把我的书借去。
So long as you’re happy, it doesn’t matter what you do.
只要你高兴，你做什么都没有关系。
二、时态问题
在条件状语从句中，要注意“主将从现”的规定，即主句用一般将来时，从句用一般现在时表示将来时。例句：I will come to see you if I have time. 我有时间，我就来看你。
常见考法
对于条件状语从句的考查，多以单选和完形填空的形式，从时态的角度设题，考查学生灵活运用的能力，或从连词的意义角度让大家选择连词。
典型例题：If he ___in half an hour,we ___wait for him.
A. won't come ,won't 't come ,don't
't come ,won't come ,don't
解析：本题考查条件状语从句“主将从现”的运用。题干的意思是“如果他一小时后不来，我们将不会等他了”，从“in half an hour”，“一小时后”可知本句说的是未来的事，那么if引导的条件状语从句要用一般现在时表示将来时，主句要用一般将来时。
答案：C
误区提醒
if 既可以引导条件状语从句，表示“如果”，也可以引导宾语从句，表达“是否”。辨别它在这两种从句中的时态是我们经常容易出错的地方。另外，if 和unless的用法也需注意。
典型例题： ----I wonder if your wife to the party.
----If your wife _________, so will mine。.
A. will go， go
B. will go, goes
, will go D. will go, will go
解析：第一句中if表示“是否”，引导宾语从句，用将来时will go；第二句“如果你的妻子去，我的妻子也去”，if引导条件状语从句，用一般现在时表示将来时。 your wife，单三人称主语，所以用goes 。
答案：B
一、If引导的条件句
*引导条件状语从句最常用的连词是if。if 引导的条件句有真实条件句和非真实条件句两
种（非真实条件句会在以后的虚拟语气中阐述），其引导的真实条件状语从句表示在某种条件下某事很可能发生。
1、“if从句（一般现在时）+主句（一般现在时）”的条件句----表达真理或事实（动作必然发生）。
If you heat ice, it turns into water.如果你加热冰，它就会变成水。
If you put suger into water, it disappears.如果你把糖放进水里，它就会溶解。
2、“if从句（一般现在时）+主句（一般将来时）”的条件句----谈论可能发生的事情。
If it rains tomorrow, we’ll stay at home.如果明天下雨，我们会呆在家里。
If I don’t hear from him, I won’t go. 如果没接到他的通知，我不会去。【注】这类条件句主句部分还可以用情态动词，如
I may buy a car if I pass the driving test.如果通过驾驶考试，我可能会买一辆车。
If you go to another country, you must obey the local laws.如果你去另一个国家，就必须遵守当地的法律。
3、有时if引导的条件句可以与“祈使句，and/or…”相互转换，
If you don’t hurry up, you will miss the bus.
=Hurry up, or you will miss the bus.快点，否则你会错过这趟车。
If you use your head, you’ll find a way.
=Use your head, and you will find a way.动动脑子的话，你就会想出办法。
二、unless引导的条件状语从句
unless意为“除非、如果不”，用来引导否定意义的条件句，等于“if…not…”
Let's go out for a walk unless you are too tired.
= If you are not too tied, let's go out for a walk. 我们出去散步吧，除非是你太累。
Unless you brush your teeth every day, you will get a toothache.
=You will get a toothache if you don’t brush your teeth every day. 如果不每天刷牙，你就会牙疼。
用unless改写句子
1. If you haven't listened carefully, you won't know how to do the exam questions.
2. If I don't leave now, I will be late.
3. We will get lost if we don't have a map.
4. If you don't return your book to the library today, you will be fin ed.
5. I will buy that dress if someone hasn't bought it already.
用if 或unless填空
1. _______he wants to see me, you can tell him to wait.
2. _______it snows tomorrow, we’ll have a day or two off.
won’t go to his party_______he invites us.
is sure to pass the exam_______she is ill.
5. _______I’m tired, I’ll have a rest for tea.
won’t buy that backpack_______it costs less than 100 yuan.
7. I will lend you the money_______you pay back on time.
8. You will fail the exam_______you study hard.
will buy a computer_______I am able to save enough money.
10. _______you drop a glass, it breaks.
单选
1. If I ________ his phone number, I will tell you.
A. find
B. found
C. will find
D. h ave found
2. We will go camping if it _______ tomorrow.
A. Won’t rain
B. didn’t rain
C. doesn’t rain
D. i sn’t raining
3. I’m waiting for my friend. If he _______, I ______ swimming alone.
A. doesn’t come; will go
B. won’t come; will go come; won’t go D. don’t come; will go
4. ______ you go to the supermarket at 7 , you can buy a lot of chea p food.
A. If
B. Unless
C. Whether
D. Whe n
5. I won’t get to the party on time ______ I catch the first train t omorrow morning.
A. If
B. Unless
C. Whether
D. W hen
6. ------Shall we go on a picnic this weekend ------Good idea! Unless it _______.
A. rains
B. doesn’t rain
C. rain
D. won’t rain
7. -----Can I change the jacket for another one ______ it doesn’t fit me well ----- Of course.
A. unless
B. if
C. that
D. though
8. -----if I get good grades this time, my parents _____ me to Hong Ko ng for a five-day trip.
A. take
B. takes
C. took
D. will take
everyone ____ the traffic rules, the roads will be much safer (安全得多).
A. obey
B. obeys
C. obeies
D. obeying
mustn't cross the road if the light _____ red.
A. turning
B. are
C. turns
D. is
I.单项选择
you _____ to the party, you’ll have a great time.
A. will go
B. went
C. go
D. going
will be a long time ____ peter _____ his work.
a. since, has finished
b. after, finishes
c. when, will finish
d. before, finishes.
3. what will father _____ us from Japan
a. take
b. bring
c. carry
d. make
5． I____ her the answer if she ____me.
a. can tell, will ask
b. will tell, will ask
c. would tell, ask
d. will tell, asks
6. – what are you going to do tomorrow
--we’ll go to the library tomorrow if it ___.
a. isn’t rain
b. rain
c. won’t rain
d. doesn’t rain
7.—Do you know when he will come back tomorrow
--sorry, I don’t know. when he ____ back, I’ll tell you.
a. comes
b. will come
c. come
d. may come
8. what will you do if you _____ to the old folk’s home visit
a. go
b. went
c.going
d. will go
9. If I eat ____ food, I’ll be very fat.
a. too many
b. many too
c. too much
d. much too
’ll give the book to him if he ___ here next sunday.
a. will come
b. comes
c. is coming
d. came
11. There ____an English film in our school tomorrow.
a. is going to have
b. will have
c. is going to be
d. has you tell us where ____
a. will the next olympic games held
b. the next olympic games will be held
c. would the next olympic games be held
d. the next olympic games would be held
13. When my mother returned last night,I ____ a book.
a. read
b. am reading
c. was reading
d. am going to read
初二英语 条件状语从句
条件状语从句 1、定义由引导词if 或unless 引导的状语从句叫做条件状语从句。在英文中，条件是指某一件事情实现之后(状语从句中的动作，其它事情(主句中的动作才能发生，通常译作" 假如" 。(注意:在含有条件状语从句的复合句中，表示将来时态，主句是一般将来时态, 祈使句或谓语动词是情态动词，从句要用现在时态, 即[主将从现原则]。 Eg1: Take the medicine, you will be fine. Eg2: If you can read as many English books as possible, your English will be improved. 2、用法语法引导条件状语从句最常用的连词是if, 由if 引导的条件状语从句表示在某种条件下某事很可能发生if 引导的条件状语从句既可以将从句放前面也可以将从句放后面。除了if 之外，还有其他连词也可以引导条件状语从句。 【注：在条件状语从句中，绝大数情况下some 要变为any 。】 (1 unless conj.除非，若不，除非在……的时候 Eg1: You will fail to arrive there in time unless you start earlier.如果你不早点动身，你就不能及时赶到那儿。 Eg2: Unless it rains, the game will be played.除非下雨，比赛将照常进行。 (2 on condition(that...在……条件下，如果 on condition (that...引导的是主句事件发生的前提条件或唯一条件。 Eg1: 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。 Eg2: You can go swimming on condition (that you don't go too far from the river bank. 你只有在不远离河岸的条件下才可以下水游泳。 Attention （注意）： ① unless = if...not. Eg: 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. ② 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 Eg ：If it rains tomorrow, we won’t go on a park 非真实条件句是虚拟语气的一种，表示与事实相反，主句用would do，从句用过去式，具有假设性，一定不会是真的, 即所假设的事情基本不会有发生的可能。 Eg ：If I were you, I would go with him. ③so/as long as （只要）、in case（万一）引导。 Eg1: So long as you’re happy, it doesn’t matter what you do. 只要你高兴，你做什么都没有关系。 You may borrow my book as long as you keep it clean只要你保持书的清洁，你就可以把我的书借去。 Eg2: Take your umbrella in case it rains. 带着你的伞吧，以防下雨。 ④“祈使句+and / or+简单句”。其中and 表示句意顺承；or 则表示转折，意为“否则”。Eg1: If you work harder, you’ll pass the exam. = Work harder, and you’ll pass the exam. 如果你再努力些，你就会通过考试。
八年级状语从句(一)
状语从句精讲 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 I will telephone you as soon as I arrive in Shanghai. She wants to be a teacher when she grows up. My mother came in while I was reading last night. 条件 If, unless We will visit the museum if it doesn’t rain tomorrow. Our sports meeting will continue unless it rains tomorrow. 原因 As, because, since, now that Tom didn’t go to school today because he was ill. Since he will not do it, I have to ask someone else. We have to go as it’s getting late. The day breaks, for the birds are singing. Now that you are free today, you may have a rest at home. 地点 Where I found the book where you left it. 目的 So that, in order that Read slowly so that everyone can follow you. 结果So that, so…that, such…that She was so angry that she couldn’t say a word. She is such a lovely girl that we all like her. 让步 though, although, even if, however Though he was very tired, he still worked hard. 方式 As I did as you told me. 比较than, (not)as…as, The work isn’t as easy as I thought. The more you exercise, the healthier you will be. 易混词解析：举一反三，学的更轻松！ 1. 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 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since表示显然的或已知的理由或事实，常译成"既然"，语气比because弱，主句的内容是全句句意的重心所在。 as 引出的状语从句，一般位于主句之前，表示的原因语气最弱。如：
中考英语状语从句专项训练及答案及解析
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条件状语从句初二英语
2015-12-20 条件状语从句 1、定义 由引导词if或unless引导的状语从句叫做条件状语从句。在英文中，条件是指某一件事情实现之后(状语从句中的动作)，其它事情(主句中的动作)才能发生，通常译作"假如"。(注意:在含有条件状语从句的复合句中，表示将来时态，主句是态,或谓语动词是，从句要用态,即[原则]。 Eg1: Take the medicine, you will be fine. Eg2: If you can read as many English books as possible, your English will be improved. 2、用法 语法引导条件状语从句最常用的连词是if, 由if引导的条件状语从句表示在某种条件下某事很可能发生if引导的条件状语从句既可以将从句放前面也可以将从句放后面。除了if 之外，还有其他连词也可以引导条件状语从句。 【注：在条件状语从句中，绝大数情况下some要变为any。】 (1) unless conj.除非，若不，除非在……的时候 Eg1: You will fail to arrive there in time unless you start earlier.如果你不早点动身，你就不能那儿。 Eg2: Unless it rains, the game will be played.除非下雨，比赛将照常进行。 (2) on condition(that)...在……条件下，如果on condition (that)...引导的是主句事件发生的前提条件或唯一条件。 Eg1: 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。 Eg2: You can go swimming on condition (that) you don't go too far from the river bank.你只有在不远离河岸的条件下才可以下水游泳。 Attention（注意）： ①unless = if...not. Eg: 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. ②if 引导的有和两种： 真实条件句Eg：If it rains tomorrow, we won’t go on a park
八年级状语从句练习【52道选择题】
状语从句练习 选择题 ( )1. --What is our head teacher like, do you know? --Oh, he is very kind he looks very serious. A. because B. though C. if D. when ( )2. It’s snowing outside! Put on more clothes, you may catch a cold. A. and B. but C. or D. though ( )3. --May I surf the Internet now? --No, you have finished doing the dishes. A. unless B. if C. because D. when ( )4. They knew nothing about it his sister told him. A. since B. if C. until D. after ( )5. My brother was taking a bath the UFO landed on the street. A. until B. while C. when D. before ( )6. --Dad, physics is too boring. --Work hard, you’ll find it interesting. A. or B. and C. but D. unless ( )7. The party didn’t start all the guests arrived. A. when B. while C. after D. until ( )8. --When are you going to tell the bad news to Cindy? -- she comes back. A. Unless B. As soon as C. Since D. If ( )9. She is careful that she seldom makes mistakes in the test. A. so B. such C. too D. very ( )10. --What are the students doing? --Girls are flying kites boys are playing basketball. A. when B. after C. while D. as soon as ( )11. We should help each other, learn from each other. A. neither; nor B. not; but C. not only; but also D. either; or ( )12. You must leave here now you can get to the airport on time. A. because B. though C. so D. so that ( )13. He can’t understand me I have explained it to him many times. A. if B. because C. though D. and ( )14. We won’t wait for you you come here on time. A. if B. unless C. when D. until ( )15. The problem is difficult, he has worked it out. A. however B. yet C. while D. and ( )16. That was our first lesson, she didn’t know all our names. A. for B. but C. so D. or ( )17. I like pop music, but my father my mother likes it. A. both; and B. either; or C. neither; nor D. not only; but also ( )18. After climbing the hill, I was tired go home on foot. A. too; to B. so; that C. such; that D. quiet; that
高中英语人教版：必修一+状语从句专项讲解+
高考英语状语从句专项讲解 一、考点分析 状语从句主要考点在语法填空、翻译和作文。 二、专题详解 状语从句梳理 知识点1：分类 语从句可以分为以下九种： 1、时间状语从句 2、地点状语从句 3、原因状语从句 4、目的状语从句 5、结果状语从句 6、条件状语从句 7、方式状语从句 8、让步状语从句 9、比较状语从句 知识点2：具体用法 1) 时间状语从句：
as soon as Hardly/scarcely had…when No sooner had …than…. the moment.. the instant…the second…immediately directly…instantly…①As soon as I arrive in Shanghai, I’ll write to you.我一到上海就给你写信。 ② Hardly (scarcely) had I got home when it began to rain. 我刚一到家就下雨了。 ③No sooner had we got to the station than the train left. 我们刚到车站，火车就走了。 ④We had just begun the moment we were told to stop. 我们刚开始就被叫停。 ⑤I felt cheerful immediately I heard the song. 我一听到这首歌就感到很愉快。 ①hardly…when和no sooner…than的意义相当 于as soon as，但只表示过 去发生的事情，主句为过去 完成时，从句为过去时，如 hardly或no sooner位于句 首时语气强，而且主句的谓 语要用部分倒装。 ②名词短语连词： “一……就……” 主句+ the moment…从句 主句+the instant…从句 主句+the second…从句 ③ 副词短语连词： 主句+ immediately +从句 主句+ directly +从句 主句+ instantly+从句 every time =each time last time…next time…the first time ①Every time I traveled by boat, I got seasick. 我每次乘船都晕船。 ②Last time we saw you,you were too thin. 上次我们见到你的时候，你太瘦了。 every time=each time “每次……；每当……” last time…“上次……” next time…“下次……” the first time“第一次……”
状语从句(9种全)
状语从句 在复合句中作状语的从句叫状语从句。状语从句有时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。 一、时间状语从句 引导时间状语从句的连接词有: when, as, while, after, before, since, ever since, as soon as, once, till, until, whenever, no sooner…than, hardly/scarcely...when, the moment/minute/instant/second, every time, each time, any time, the first time, next time, last time, all the time, by the time, directly, immediately, instantly等。 1.表示“一···就···”的句型 1) as soon as/once As soon as he arrives, I'll call you.他一到，我就给你打电话。（as soon as 侧重时间或动作先后衔接紧，而once侧重条件，表示“一旦...”） 2) on doing sth/on one's + n.作时间状语 On arriving at the station, the thief was arrested. 一到达车站，这个小偷就被逮捕了。 On his arrival in Paris, he was recognized as a noble and thrown into prison. 他一到达巴黎，就被认出是一个贵族，并被投入监狱。 3) no sooner ...than , hardly/scarcely...when 它们表“一…就”。结构中的否定词放在句首时，主句要倒装。（主句都用过去完成时，从句用一般过去时。） No sooner had he reached home than it began to rain. 他刚到家，天就开始下雨了。 Hardly/Scarcely had I entered the room when the phone rang. 我一进屋，电话就响了。 当no sooner, hardly, scarcely不放在句首时，主句不倒装，如： I had no sooner reached the bus stop than the bus started. 我刚到车站，车就开走了。 I had scarcely（hardly）entered the room when the phone rang. 4）the moment, the instant, the minute, the second The moment I saw him, I recognized him. 我一看见他，就认出了他。 We'll leave the minute you are ready. 你一准备好，我们就出发。 5)有些副词如：instantly, immediately, directly可用作连词，后接从句。 I left immediately the clock struck 5. 我刚走，钟就敲了五点。 2. when, while, as引导时间状语从句 1) when的用法 ①when既可指时间点，也可指时间段（即：从句动词可以是短暂的也可是延续的）；主从句动作可同时也可先后发生。
八年级上册条件状语从句
八年级上册条件状语从句 单选题 1. — What are you going to do this Saturday? — I'm going to climb Mount Tai it doesn't rain. A. so B. if C. until 2. T hey will have a trip to the Summer Palace if it next Sunday. A. doesn't rain B. won't rain C. didn't rain 3. — Will you go to the movies with me? — If I finish my homework, I _______ with you. A. go B. will go C. going 4. I f she goes to the party, . A. so he will B. so will he C. so does he 5. you eat less sugar, you will lose . A. If; heavy B. Unless; heavy C. If; weight 6. I f it tomorrow, we to climb mountains. A. doesn't rain; go B. won't rain; will go C. won't rain; go 7. — Have you decided when you a new car? — If I one, I will hold a party to celebrate it. A. buy; will buy B. will buy; buy C. buy; buy 8. — How do you spend your weekends? — If I _______ free, I _______ to the cinema with my good friend. A. will be; will go B. am; will go C. am; go 9. — Do you know if he back tomorrow? — Sorry, I don't know. If he back, I will tell you at once. A. comes; comes B. comes; will come C. will come; comes 10. You can't believe how terrible the fire is you see it with your own eyes. A. though B. because C. unless 11. — Our holiday cost a lot of money. — Did it? Well, it doesn't matter you enjoyed yourselves. A. so that B. as long as C. unless 12. Milk goes bad quickly in summer it is in a fridge (冰箱). A. if B. because C. unless 13. You won't feel happy at school you get on well with your classmates. D. because D. isn't raining D. went D. so he does D. Unless; weight D. doesn't rain; will go D. will buy; will buy D. will; will go D. will come; will come D. since D. as soon as D. when 1
(完整版)初中英语语法专题(状语从句)讲解
初中英语语法专题（状语从句）讲解 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 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 t han, (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： 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！ 1. 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 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.
八年级下册-状语从句讲解
Adverbial Clause（状语从句） 1状语从句的种类 用来修饰谓语动词、其它动词、定语、状语或整个句子的从句叫做状语从句。状语从句可分为： 1.时间状语从句；(adverbial clause of time) 2.地点状语从句；(adverbial clause of place) 3.原因状语从句；(adverbial clause of cause) 4.条件状语从句；(adverbial clause of condition) 5.目的状语从句；(adverbial clause of purpose) 6.让步状语从句；(adverbial clause of concession) 7.比较状语从句；(adverbial clause of comparison) 8.程度状语从句；(adverbial clause of degree) 9.方式状语从句；(adverbial clause of manner) 10.结果状语从句。(adverbial clause of result) 2状语从句的时态特点 一般情况下，时间和条件状语从句的谓语动词一般用“一般现在时”表示“一般将来时”，用“现在完成时”表示“将来完成时”。例如：I will call you as soon as I arrive in Beijing. 我一到北京就给你打电话。（这是由as soon as引导的时间状语从句，从句中的谓语动词arrive是一般现在时，表示一般将来时，决不可用will arrive）As soon as I have finished this work, I will go home. 我一完成此工作，就回家。（从句中的谓语动词用现在完成时have finished，表示将来完成时,决不可用will have finished）If he comes back, please let me know.如果他回来了，请通知我。（从句中的谓语动词用comes back,表示一般将来时，决不可用will come back） 3时间状语从句（adverbial clause of time） 1.由when, while, as引导的时间状语从句。例如：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。 When truth is buried under the ground it grows, it chokes, it gathers such an explosive force that on the day it bursts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！Strike while the iron is hot. 趁热打铁。Will you watch my clothes while I have a swim. 我游泳的时候，请你照看一下我的衣服。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。 when, while和as的区别：when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。并且when有时表示“就在那时”。例如：When she came in, I stopped eating.她进来时，我在吃饭。(瞬时动词) When I lived in the countryside, I used to carry some water for him.当的住在农村时，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。 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） 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 was 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） 2.由before和after引导的时间状语从句。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引导的从句谓语用的是过去时，则主句动词多用过去完成时，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。
初中英语状语从句归纳.doc
状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目 的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。 一、时间状语从句 要点 : 时间状语从句，由以下连词引导： when while as after before as soon as since till /until by the time 在时间状语 从句中，要注意时态一致。一般情况下主句是将来时的时候，从句要用一般现在时。 当。。。的时候 mozart started writing music when he was four years old. (当 )莫扎特的时候，开始写音乐作品。 当。。。时 he visited a lot of places while he was traveling. 他在旅途中参观了许多地方。 在。。。的同时；一边。。。一边。。。 he smiled as he stood up. 他一边站起来一边笑着。 在。。。之后 he left the classroom after he had finished his homework the other day.
前几天做完作业之后回的家。 在。。。之前 mr. brown had worked in a bank for a year before he came here. 布朗先生来这之前已经在一家银行里工作一年了。 soon as 一。。。就。。。 we began to work as soon as we got there. 我们一到那就开始工作。 i will write to you as soon as i get home. 我一到家就给你写信。 自。。。以来到现在 表示自过去的一个起点时间到目前 (说话时间 )为止的一段持续时间。主句一般用现在完成时，从句用一般过去时。 mr green has taught in that school since he came to china three years ago. 自格林先生来中国以来，他就在这所学校教书。 (还可以用作介词，本句从句还可以用短语：since three years ago(自三年前以来 )表示。 ) 8 till /until 都可以作连词，连接时间状语，也可以作介词，与其它词构成介词短语，在句中作状语。 they walked till /until it was dark.
状语从句专项练习经典(1)
必备英语状语从句专项练习经典 一、初中英语状语从句 1．We don't know the love of our parents _______ we become parents ourselves one day. A．until B．after C．when D．since 【答案】A 【解析】 句意：直到有一天我们成为父母，才知道父母的爱。本题考查连词。A. until到…为止，在…以前; 直到…才;B. after在…以后;C. when当···时候；D. since自从; 从…以来; Not until 直到···才···；不到···不···，是固定搭配，故选A。 2．Rony will get a chance to work in this company ________ he doesn’t pass the interview. A．unless B．when C．if D．after 【答案】A 【解析】 【详解】 句意“除非罗尼没有通过面试，否则他将有机会在这个公司上班”。A.除非；B.当……时候；C.如果；D.在……时候。根据句意可知，表示“除非他没有通过面试”，故选A。 3．You will fall behind others ______ you work hard. A．if B．unless C．though D．since 【答案】B 【解析】 试题分析：句意：如果你不努力学习，你会落后别人。A.because因为；B. If如果；C. Unless如果不； D. Though虽然。结合句意，故选B 考点：考查连词的用法. 4．It is necessary for children to exchange ideas with parents from time to time ________ a good parent-children relationship could be set up. A．so that B．because C．as soon as 【答案】A 【解析】 【详解】 句意“为了建立良好的亲子关系，孩子们有必要不时地与父母交流思想”。A.目的是，为的是（引导目的状语从句）；B.因为（引导原因状语从句）；C.一……就……（引导时间状语从句）。根据句意可知，表示“目的是为了建立良好的亲子关系”，表示目的，故选A。