初中英语——If引导的条件状语从句

第一篇：初中英语——If引导的条件状语从句

初中英语――if引导的条件状语从句

引导条件状语从句最常用的连词是if，常见的if条件状语从句表示在某条件下，某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。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。

If you have finished the homework，you can go home．如果你作业做完了就可以回家了。

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，表示对现在或过去的一种假设。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。

I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞，我本会来得早一些。另外你还要注意if 条件句的时态搭配

1．if从句用一般现在时，主句用一般将来时

If he runs，he’ll get there in time.如果他用跑的，他就会及时赶到那儿。

The cat will scratch you if you pull her tail.如果你拉猫的尾巴，它就会抓你。

2．if从句用一般现在时，主句用may/might/can

If the fog gets thicker，the plane may/might be diverted.如果雾在大一些，飞机可能就会改在别的机场降落。If it stops snowing，we can go out.如果雪停了，我们就可以出去。

3．if从句用一般现在时，主句用must/should

If you want to lose weight，you must/should eat less bread.如果你想减肥，你必须少吃面包。

4．if从句用一般现在时，主句用一般现在时

If you heat ice，it turns to water.(也可用will turn)如果把冰加热，它就会化成水。

5．if从句用现在进行时，主句用一般将来时

If you are looking for Peter，you’ll find him upstairs.如果你是在找彼得，上楼就会找到他。

6．if从句用现在完成时，主句用一般将来时

If you have finished dinner，I’ll ask the waiter for the bill.如果你吃完了，我就叫服务生来算账

注意 ：

学习“ if ” 引导的条件状语从句的用法,现在总结一下:

if 条件句不一般,几个要点记心间;

条件句,放在前,逗号要放句中间。

条件句表可能，主句多用将来时；

条件句表事实，主句常用现在时。

在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。如：

We can walk there if we can't find a bus.If it rains tomorrow ,we will not goto the zoo.What will youdo if youfind a panda in danger.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。如：If bears are in danger ,they attack people.在 if 引导的条件状语从句中，if 和条件句位置灵活，可直接放在主句后面，若 if 条件句放句首，从句后面要加逗号，和主句隔开。还要注意前后时态一致原则

if 条件状语从句的时态练习

一.单项选择

1.If you _____ to the party, you’ll have a great time.A.will goB.wentC.goD.going

2.It will be a long time ____ Peter _____ his work.A.since, has finishedB.after, finishes

C.when, will finishD.before, finishes.3.What will father _____ us from Japan?

A.takeB.bringC.carryD.make

4.Weifang is famous ______ kites

A.forB.toC.onD.with

5． I ____ her the answer if she ____me.A.can tell, will askB.will tell, will askC.would tell, askD.will tell, asks

6.– What are you going to do tomorrow?--We’ll go to the library tomorrow if it ___.A.isn’t rainB.rainC.won’t rainD.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.comesB.will comeC.comeD.may come

8.What will you do if you _____ to the old folk’s home visit?

A.goB.wentC.goingD.will go

9.If I eat ____ food, I’ll be very fat.A.too manyB.many tooC.too muchD.much too

10.I’ll give the book to him if he ___ here next Sunday.A.will comeB.comesC.is comingD.came

11.There ____an English film in our school tomorrow.A.is going to haveB.will haveC.is going to beD.has

12.Could you tell us where ____？

A.will the next Olympic Games heldB.the next Olympic Games will be held

C.would the next Olympic Games be heldD.the next Olympic Games would be held

13.When my mother returned last night, I ____a book.A.readB.am readingC.was readingD.am going to read

14.What ____ you ____ when it began to rain?

A.do, doB.were, doingC.are, doingD.did, do

15.I’ll wake you up when he ____back.A.willB.is going to comeC.comesD.come

二．在正确的答案下划一条线。

1.Daina(will go/go/goes)to Europe if she(will pass/pass/passes)the exams.2.The graduates(will teach/teach/teaches)in the poor village if the Ministry of Education(will agree/ agree/agrees)soon.3.If there(will be/ are/is)a car accident, they(will call/call/calls)110 for help at once.4.If it(won’t/don’t/doesn’t/ isn’t)rainy, we(will take/ take/takes)walk outside.5.If a UFO(will land/land/lands)in front of me, I(will go/go/goes)in to look for the alien.6.If he(will have/have/has)money, he(will bulid/build/builds)a science lab.7.Don’t wait for me if I(am/ will be)late.8.They(won’t/don’t)go to the beach if it(will rain/rain /rains).9.I(will call/ call)you if he(will stay/stay /stays)at home.10.Mr Smith(will let/ let/lets)you know if he(will need/ need/ needs)help.11.(Will / Do/ Does)he visit the museum if he(won’t / don’t/ doesn’t)gettired?

12.Where(will/ do/does)they live if they(will miss/ miss/ misses)the bus?

三、用所给词的适当形式填空

1.If you ________(feel)tired, you _________(have)to have a rest.2.Where _____ he ____(see)the film if he _________(have)time?

3.If there ____(be)fewer trees, there _______(be)more pollution.4.He ___(dress)more casually if he ___(not work)on weekends.5.If Marcia _______(live)alone, she _______(keep)a pet parrot.6.Lana _____(buy)a new dress if the old one ____(be)out of style.7.The twins _______(fight)if they__________(argue).8.I ______(have)a bake sale if I ____(need)money for education.9.Peter ____(send)me a beautiful souvenir if he ____(tour)Spain.10.If Mr.Green _______(say)I am hard-working, my parents ___(feel)glad.11.I ______(go)to the beach if it________(not rain)this week.12._____they ___(have)a match if the P.E.teacher __(be)busy?

13.He ____(write)a letter to his grandparents if he ____(get)his report card this week.14.If she ______(get)up late, she _____(not catch)the early bus.15.Peter ____(major)in English if he ____(pass)the exams in PekingUniversity.四．完成句子

1.如果他到的晚了会发生什么事情？

What _______________ if he _____________ late?

2.如果努力学习，你就会取得好成绩。

If you_________ ________, you ________ good ___________.3.他如果看电视太久了，他的父母会不高兴。

If he _____ TV too much, his parents _____ _________unhappy.4.如果我们为他组织生日聚会，大家都会来的。

Everyone ________ if we _______a birthday party ________ him.5.如果明天不下雨，我会和你一起去公园的。

If it _____ ______tomorrow, I _____ go to the park ______you.6.如果她睡过头了，就会旅游迟到的。

She;_________ ___the trip if she _____ ___

7.如果他有空，他会帮助你的。

If he ____ ____, he ______ ____ you.8.如果Tom考试不及格，他就没有机会上高中了。

Tom ______have the _____to go to the high school if he ________the exams.9.你如果抄同学的作业就不能学好各门功课。

You _______ _____ good at all the subjects if you ______ the other students’ homework.

第二篇：状语从句

Clauses of Condition, Concession and Contrast(条件、让步和对比从句)条件从句

由 if, unless, as(so)long as, provided / providing(that), suppose / supposing(that), in case等引导，如：

If he comes I'll tell you.You would have succeeded if you had tried harder.You will fail unless you work hard.(=You will fail if you don't work hard.)

Supposing / Suppose it rains, shall we have the match as scheduled?

In case you need anything else, please let me know.让步从句

由 although, though, even though, even if, whether...or, while, as, wh-words + ever(= no matter + wh-words)等从属连词引导，如：

He is quite modest though he is the best student in the class.The needle has the same mass whether it is hot or cold.Whichever(No matter which)plan you adopt, you will meet with difficulties.使用上述让步从句的某些从属连词时注意以下几点：

a.although(though)不可与连词 but 连用；

b.as 引导的从句意义和 though 相似，但表示的语气较强，并须将强调的词放在句首（但不用 although），如：

Simple as(though)the question may seem, it is not at all common in nature.c.however / no matter how 引导的从句中，however / no matter how 后须紧跟形容词或副词，如：

However / No matter how hard I tried, I couldn't remember all the questions.对比从句

表示两个人或两件事之间的对比，常用 while 或 whereas 引导，如：

He is idle, while his brother is diligent.Some people like fat meat, whereas others hate it.Clauses of Cause, Result and Purpose(原因、结果和目的从句)原因从句

主要由下列从属连词引导：

1． Because, as, since。其中 because 语气最强，表示直接、主要原因，通常引导的从句放在句尾，特别是回答 why 提出的问题只能用 because;as 和 since 表示明显的、已知的原因，since 比 as 正式，如：

They had to move because their building was to be pulled down.As Mary was the eldest, she looked after the others.Since they live near the sea, they often go sailing.2． now that, seeing(that), considering(that), in that。这些连词与 as, since 意思相近，通常用于书面语，并且它们兼有其它意义。now that 有“时间”含义，表示”既然”，说明一种新

情况；seeing(that)和 considering(that)有“条件”含义；in that 有”某一方面”含义，如：

Now that you are well again you can travel.Seeing(that)they are just beginners, they are doing quite a good job.I was lucky in that I was able to find a good baby-sitter（保姆）.结果从句

常用 so that, so...that, such...that, that 等连词引导，如：

I was caught in a shower, so that all my clothes got wet.I was so tired that I could hardly keep my eyes open.He was such a good runner that I couldn't catch him.目的从句

常用 so that, in order(that), lest, for fear that 等连词引导，如：

I took a taxi so that I could be in time for the meeting.Come closer in order that you may see the blackboard better.so that 既可引导结果从句也可引导目的从句，但结果从句表示事实，通常不含情态动词；目的从句表示希望或想要实现的事实，通常含有情态动词，如：

He got up early so that he caught the train.（结果）

He got up early so that he could(might)catch the train.（目的）

Lest 和 for fear(that)含有否定意义，并且从句中动词须用 “动词原形”或 ”should + V.” 的虚拟语气，如：

He ran away lest he(should)be caught.(= He ran away in order that he would not be caught.)

I checked all the results time and again for fear that there should be any mistakes.(= I checked all the results time and again so that there wouldn't be any mistakes.)

Clauses of Manner and Comparison(方式和比较从句)方式从句

主要由 just as, as, as if, as though 等连词引导，如：

He doesn't speak the way as other people do.Our bodies are made up of millions of very small cells, just as a building is made of many stones or bricks.He speaks French as if(as though)he were a Frenchman.由 as if 或 as though 引导的从句通常用虚拟语气，但如果主句谓语是感官动词，并且所述情况实现可能性大，也可用陈述语气，如：

It looks as if the coming autumn harvest will be even better than the last one.比较从句

主要由 as...as, not so(as)...as, than 等连词引导，如：

This table is as wide as that one.Mary can not run so(as)fast as Tom.Silver conducts electricity better than other metals.Clauses of Proportion and Other Types(比例从句和其它从句)比例从句

由关联词 the...the...连接形容词或副词比较级构成，如：

The more she thought about it, the more she liked it.其它从句

如 as...so 和 what...that 引导的类比从句；so(as)far as 引导的范围从句；except that 引导的例外从句；rather / sooner than 和 would / had rather than 引导的择比从句等，如：

As the desert is like a sea, so is the camel like a ship.（沙漠似海，骆驼似舟。）

What blood vessel is to a man's body, that railway is to transportation.（铁路对于运输，好比血管对于人的身体。）

As(So)far as I know, he is an honest man.（据我所知，他是一个诚实的人。）

I would do it with pleasure, except that I am too busy.（要不是我太忙了，我会很高兴去做的。）

Rather than get money in such a dishonest way, he would beg in the streets.（他宁可沿街乞讨，也不愿意用欺骗手段骗取钱。）

He would rather have the small one than the large one.（他宁可要那个小的，而不愿要那个大的。）

第三篇：if引导的条件状语从句

If引导的条件状语从句中考题型

1.I will send you an e-mail as soon as I _______ in Canada.A.arrive B.arrived C.am arriving D.will arrive 2.If there _______ no buying and selling of animals, there ______ no killing in nature.A.is;will he B.will be;will be C.is;is D.will be;is 3.I’m waiting for my friend._____, I'll go shopping alone.A.If she comes B.If she won't come C.If she doesn't come 4.Mr.Green speaks very loudly _______ all the people can hear him clearly.A.when B.so that C.because 5.You can’t watch TV ________ you finish your homework.A.before B.if C.while D.as 6.As we all know, planting trees is good for the environment.Our class will go to the Sun Island tomorrow.As soon as we ______ there, we’ll begin to plant trees.A.arrived B.arrive C.will arrive 7.The students ________ have a sports meeting this weekend if it ________.A.won’t;rains B.will;rains C.won’t;will rain D.are going to;is going to rain 8.Don’ talk loudly at the meeting.If you ________, you will have to leave.A.do B.are C.did 9.I don't know if she _______ to my birthday party tomorrow.If she ______, I'll be very happy.A.comes;comes B.will come;comes C.comes;will come 10.— When will you come to Daqing? — I will call you _____I arrive.A.till B.while C.as quickly as D.as soon as 11 I’ll give it to Jim as soon as I _______ him tomorrow.A.saw B.will see C.see D.have seen 12.I’m waiting for my friend._______, I’ll go shopping alone.A.If she comes B.If she doesn’t come C.If she won’t come 13.If she ______ here tomorrow, I will tell you.A.comes B.will come C.come D.came 14.Mary, could you tell me if your mother ________ our school sports meeting tomorrow? —I think she will come to school if she _________ free.A.will take part in;will be B.takes part in;is C.will take part in;is D.takes part in;will be 15.—Tom wants to know if you will have a picnic tomorrow.—Yes.But if it ______, we’ll play chess instead.A.will rain B.rained C.is raining D.rains 16.— You study ______ hard _______ you’re sure to pass the exam.— Thank you for saying so.A.enough, to B.as, as C.so, that 17.If Tom _____ the game, we'll give him a surprise".A.win B.wins C.won D.miming 18.— I hear the famous singer Xu Song may come to Ningbo next month.— Really? _______ he comes, my younger sister will be very excited.A.If B.Until C.Unless D.Before 19.－What time will Diana get to Chengdu? －I’m not sure.When he ________, I’ll call you.A.will arrive B.arrive C.arrives 20.Zhou Libo is Shanghai’s favorite funny man.He is good at making people laugh.His lively shows were _________ hot that tickets sold out in minutes.A.very B.too C.such D.so 21.They develop their skills _________ they can do things better and better.A.however B.because C.since D.so that 22.They develop their skills _________ they can do things better and better.A.however B.because C.since D.so that 23.—Let

’

s go fishing if it _____ this weekend.—But nobody knows if it _______.A.is fine, will rain B.will be fine, rains C.will be fine, will rain D.is fine;rains

1.答案：A

【解析】考查点：本题考查状语从句的时态的用法。当主句是将来时态时，状语从句用一般时态来代替将来时，所以选择答案A。

2.答案：A

【解析】考查点：本题考查if引导的状语从句的时态。if 意为“如果”。引导条件状语从句，主将从现。故选A。

3答案：C

【解析】考查从句的时态。If引导的条件状语从句，主句用将来时，从句用一般现在时。根据句意：如果他不来，我就独自去购物。故选C。

4.答案： B

【解析】词义辨析。When 是“当------的时候”的意思；so that是“为了，目的是”的意思；because是“因为”的意思；本句中，so that 引导的目的状语从句。

5.答案：A

【解析】本题考查词义辨析。A项意为“在„„之前”；B项意为“假如；即使”；C项意为“当„„时候”；D项意为“因为”。句意为“你不能看电视在你完成作业_____”。根据语可知此空应为before.故选A。

6.答案：B

【解析】考查状语从句的时态。在as soon as引导的时间状语从句中，如果主句和从句的动作都发生在将来，从句用一般现在时表示将来，句意：我们一到那儿，我们就开始植树。故选B.7.答案：A

【解析】考查if引导的条件状语从句用法。if意为“如果”，引导条件状语从句，主句用一般将来时，从句用一般现在时态。句意为“如果明天下雨我们就不举行运动会了”。故选A。

8.答案：A

【解析】考查状语从句的时态当主句为将来时态是，if引导的状语从句中用一般时态代替将来时，而这里需要助动词，不是系动词，所以选择答案A。

9.答案：B

【解析】宾语从句和条件状语从句的考查。由if引导的条件状语从句，用一般现在时态，主句用一般将来时。当if做是否讲时，所引导的宾语从句通常是一般将来时。

10答案：D

11【解析】C 考查点：考察条件从句的时态。解题思路：as soon as表示“一„„就„„”，其主句用将来时态，从句要用一般现在时态。故选C。

12答案：B

13答案：A

14答案：C

【解析】考查if引导的宾语从句及条件状语从句的用法。问句是由if引导的宾语从句，时间状语为 tomorrow，故用一般将来时；答语是由if引导的条件状语从句，主句用将来时，从句用一般现在时，故选C。

15答案：D

16答案：C

【解析】考查so„that的用法。enough...to“足够做„„”；

as...as...“和„„一样”；so...that...“如此„„以至„„”。由句意：－你学习如此的努力以至于你肯定能通过考试。－谢谢你这么说。故选C。

答案：B

17【解析】考查if引导的条件状语从句。在if引导的条件状语从句中，如果主句和从句发生的动作都在将来时间，从句用一般现在时表将来。故选B。

18答案：A

【解析】状语从句考查。if如果；until到„„为止；unless除非；before在„„之前。根据句意，如果他来，我的妹妹将会很激动的。19答案：C

【解析】考查从句的时态。When引导的时间状语从句中，如果主句和从句的动作都发生在将来，主句用将来时，从句用一般现在时。he是单数第三人称形式，故用arrives。

20答案：D

【解析】句型考查。句中的句型为so„that„, 意为“如此„.以至于„”，so 用来修饰形容词或副词，such也构成这一句型，但such 用来修饰名词。

21答案：D

【解析】状语从句。句意：他们拓展他们的技能是为了他们能够把事情做的越来越好。后面的从句表示目的，只有D符合题意。

22答案：D

【解析】考查连词的用法。句意：他们拓展他们的技能是为了他们能够把事情做的越来越好。后面的从句表示目的，只有D符合题意。

23答案： A

【解析】本题考查if的用法。第1空if引导的是条件状语从句，因此用一般现在时表示将来；第2空if引导的是宾语从句，时态时间状语this weekend决定用将来时。故选A。

第四篇：初中英语状语从句教案及精品练习讲解

掌握状语从句的作用。▲掌握状语从句的意义。▲掌握各种不同类型的状语从句。

【知识要点】状语从句在句中作状语，修饰句中的动词、形容词或副词等。

状语从句由从属连词作关联词，从属连词在从句中不充当句子成分。状语从句在主句之前，一般要用逗号分开，朗读时用升调。状语从句在主句之后，一般不用逗号，朗读时用降调。

状语从句按其意义和作用可分为时间、条件、原因、让步、目的、结果、方式、比较、地点等类型。1.时间状语从句

(1)常用的连词有when（当……时候），while（当……时候）,before(在……以前)，after（在……以后），until(till)（直到……为止）,since（自从……以来）, as soon as（一……就）等。(2)时间状语从句中一般不用将来时，若谈论将来的事情，往往用一般现在时代替：

如：I'll go on with the work when I ________(come)back tomorrow.As soon as he ___________(finish)the work, he will come to see me..2.条件状语从句

常由if(假如、如果)No matter(不管)来引导，如果主句是一般

如： I'll go for a picnic if it _____(be)fine.No matter what he ________(say)，I won't believe him，3.原因状语从句

(1)常由because, since, as引导。

(2)because表示直接的原因，着重点在从句，用于回答why, 语气最强。because 不能与 so 连用。

since一般表示对方已知的，无须加以说明的既成事实的理由，全句中心在主句，语气比because弱，常译为“既然”。

as表示十分明显的原因，一般说明因果关系，着重点在主句，语气较弱。常译为“由于”。

for是个并列连词，只能放在另一个并列分句后面，表示一种推理或解释，或用作附加说明，而不是指理由或原因，语气最弱，一般不放在句首，常译成“因为”。

如：______ it is raining hard, we won't go hiking._______ you are ill, I'll go alone.I can't go to school ________ I am ill.You haven't met him, ______ he didn't come here.4.结果状语从句

一般由so...that, such...that引导，so 与such的区别：(1)so＋形容词＋a / an＋名词

(2)such＋a / an＋形容词＋名词（3）such＋形容词＋不可

/ 可数名词复数

(4)so＋many / much / few / little＋形容词＋名词

如：It's _______ a heavy box that nobody can move it.It's ______ heavy a box that nobody can move it.There are _________many books in the library 5.目的状语从句

往往由so that,引导，如：I'll speak slowly_________ you can understand me.6.比较状语从句

常由as...as, than, not as / so...as等引导。比较从句部分常是省略句，如：I'm taller ______ he(is).Science is not _____ popular _____ English.7.让步状语从句

由though或although(虽然)等引导，但不能与but同时连用，改错：Though it snowed heavily,but they kept on working.1.方式状语从句

常用as if ,as though（好像）引导。如：He acted as if(though)nothing had happened.2.地点状语从句

常用where, wherever引导。

I'll go where work is hard.【典型例题解析】

例1 The question was _______ difficult that nobody could answer______.A.very...them B.very...it C.so...them D.so...it 解析 因为句中有that,所以前面用so,构成so……that从句，而question是单数，用代词it，故选D。

例2 It was ______that he had to ask for help.A.such big work B.so big a work C.so a big work D.such big job 解析 work是不可数名词，指工作或工程，故选A。

例3 He won't believe it ________ he sees it with his own eyes.A.when B.after C.until D.as soon as

解析 此句是not……until,“直到……才”。故答案选C。例4 I'll go _____ with you _______ next Sunday.A.hunting...when I will have time B.to hunt...until I'm free C.boating...if I have nothing to do D.to boat...as I will not be so busy

去打猎、划船常用go hunting, go boating，所以应在A和C中选择，又因为when和if在句中引导状语从句时，要用一般现在时表示将来，故选C。

例5 It's almost three years _________ I last saw her.A.since B.when C.that D.after 解析 本句表示自从上次见到她几乎有三年了，句型It's+时间段+since从句(过去时)，故选A。

【选讲例题】

用所给动词适当形式填空

例6 I'll go to Shanghai if I _______(have)time tomorrow.And I want to know if you ________(have)time to go with me.解析 第一句中if是“假如”的意思引导状语从句，要用一般现在时表示将来时，第二句中if是“是否”的意思，引导宾语从句，仍用将来时。例7 —Could you tell me when he ________(return)home next week? —Sorry, I can't.But I will ring you up when he _________(return)home.解析 第一句中的when意思是“什么时候”，引导宾语从句用将来时态，第二句中的when是“当……时”的意思，引导时间状语从句，用一般现在时表示将来。

【课内追踪练习】 单项选择

()1.Jack was tired _______he played tennis all afternoon.A.if B.as soon as C.because D.before()2____ he finished his work, he left hurriedly.A.As soon as B.In order that C.Until D Since()3._____the rain has stopped, let's start again.A.For B.Because C.Since D What()4.He started early ______ he could get there before nine.A.so that B.because C.so as to D.in order to()5.They waited ____ it was dark outside.A.since B.until C.so D.while

【复习小结】

1.牢记引导各类状语从句的连词及它们的不同意义和作用。2.注意区别when（什么时侯）引导宾语从句、（当……时）引导状语从句；if（是否）引导宾语从句、（假如）引导条件状语从句； so……that、so that、such……that 3.注意用一般现在时表示将来的几种句式。

一、单项选择

()6.Mike is _____ boy that we all like him.A.a good so B.so good a C.a such good D.such good a()7.It was ______that they wanted to go for a picnic in the country.A.such a fine weather B.so fine a weather C.a fine weather so D.such fine weather()8.Ships are______ than planes that few people take them on business.A.too much slower B.very much slower C.so much slower D.much more slower()9.They had started harvesting rice ______ the rain began.A.after B.before C.since D.as

二、在下列各句中填入适当的状语从句连词，使句子意思完整、通顺 10 I will tell you the secret_____ you don't tell anyone else about it.11 Mary always takes a seat in the first row ____________she can hear better.12.We didn't notice anything wrong with the computer _________we started using it.13.The young doctor was a bit worried ___________ it was his first time to operate on a patient.14 The elephant has ______strong a body _______it can do heavy work for people.15.It is _______ a difficult problem _______ nobody can work it out.三、句型转换 Use your head, then you'll find a way._____ you use your head, you'll find a way.17 I went to bed after my father came back home yesterday.I ________ go to bed ______ my father came back home yesterday.18 The island is so beautiful that it can attract large numbers of people.The island is beautiful ______ ____ attract large numbers of people.19 My dress is more expensive than Lily's.Lily's dress is ____ ____ expensive as mine.My sister is so young that she can’t go to school.My sister is _____ young _______ go to school.

第五篇：初中英语知识点总结：时间状语从句

在复合句中，由时间连接词引导的状语从句叫做时间状语从句。时间状语从句通常由when, while, as，after,before,since,until等词引导。

一、时间状语从句种类

1、引导的从句表示主从句的动作同时发生，或从句的动作在主句之前。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。例如：

When she came in, I stopped eating.她进来时，我停止吃饭。(瞬时动词)

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 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）

4、由before和after引导的时间状语从句，表示两个动作一前一后发生。例如：It will be four days before they come back.他们要过四天才能回来。

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。

5、由till或until引导的时间状语从句。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。

I worked until he came back.我工作到他回来为止。

6、由since引导的时间状语从句表示“自从……以来”。

I have been in Beijing since you left.自从你离开以来，我一直在北京了。

7、由as soon as引导的时间状语从句表示“一……就”。例如：

As soon as I reach Canada, I will ring you up.我一到加拿大，就给你来电话。

二、时态问题

在状语从句中，有“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 call you as soon as I arrive in Beijing.我到北京就将给你打电话。（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）常见考法

对于时间状语从句的考查，多以单选和完形填空的形式，从连词的意义角度让大家选择连词，或从时态的角度设题，考查学生灵活运用的能力。典型例题：I'm sure he will jump up when he the good news.A.know B will know C.knows D knowing 解析：本题考查学生时间状语从句的时态问题。时间状语从句中，主句若是一般将来时，从句应用一般现在时表示将来时。从句的主语是单三人称，所以排除 A。

答案： C 误区提醒

When既可以引导时间状语从句，也可以引导宾语从句，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。

典型例题：I don’t know when he next week.when he , please let me know.A.comes, comes B.will come, will come C.will come, comes D.comes, will come 解析：第一句话“我不知道他下周什么时候来”，when引导宾语从句，表示将来时，就用一般将来时will come；第二句话“当他来的时候，请让我知道”，when引导时间状语从句，用一般现在时表示将来时，所以用 comes。答案： C