It引导的时间状语从句总结与练习
小学英语状语从句知识点总结:时间状语从句
★这篇《⼩学英语状语从句知识点总结:时间状语从句》,是特地为⼤家整理的,希望对⼤家有所帮助! ■引导时间状语从句的从属连词 引导时间状语从句的从属连词很多,如较基本的有before, after, when, while, as, since, till, until, as soon as 等: Things were different when I was a child. 我⼩时候情况与现在不同。
We must strike while the iron is hot. 我们要趁热打铁。
It’s a long time since I met you last. 从上次见到你,已有很长时间了。
He waited until she was about to leave. 他等着⼀直到她准备离开。
除以上基本的引导时间状语从句的从属连词外,还有些本来不是从属连词却可⽤作从属连词的词: (1) 表⽰“⼀…就”的从属连词:the moment, the minute, the second, the instant, immediately, directly, instantly, once, no sooner…than, hardly…when等。
如: Immediately he came I told him the news. 他⼀来我就把消息告诉了他。
The moment I saw him I knew there was no hope. 我⼀看到他就知道没希望了。
We had no sooner set out than it began to rain. 我们刚出发就下⾬了。
Once he arrives, we can start. 他⼀来我们就可以开始。
(2) 涉及time的⼏个从属连词:every time(每次),each time(每次),(the) next time(下次),any time(随时),the last time(上次),the first time(第⼀次)。
高中英语状语从句讲解与练习
高中英语状语从句讲解与练习高中英语状语从句一、时间状语从句1、when的用法(1)when既可引导一个持续性动作,也可引导一个短暂性动作,可用于表示主句和从句动作同时发生或从句动作先于主句动作,有时还可表示从句动作后于主句,意为“当……时候”。
(2)when在beabouttodo……when……,bedoing……when……,haddone……when……,beonone’sway……when……,beonthepointofdoing…when……等结构中作“那时突然”讲。
(3)when“既然、鉴于;尽管,虽然(位于主句之后);如果”2、while的用法(1)则表示“当……时候”,鼓励的动作必须就是延续性的。
(2)用做同列连词,则表示相对关系“然而”。
(3)引导让步状语从句,相当于although,意为“虽然”,位于主句前。
(4)引导条件状语从句,相当于as/solongas,意为“只要”。
3、as的用法(1)则表示“当……时候”,特别强调同时出现,不所指先后。
(2)说明两种正在发展或变化的情况,表示“随着”,表示时间的推移。
(3)表示“一边……一边……”(4)强调两个动作紧接着发生。
(5)表示“虽然,尽管”(6)其他含义“正像,正如”,“做为”,“由于,因为”。
4、before的用法(1)一般意为“在……之前”“……才”,“……就”“还没有……”“免得”“不知不觉”“宁可,宁愿”,“否则,要不然”。
(2)itwillbe/was时间段before通常现在时/通常过去时。
在肯定句中,意为“多长时间之后才”;在否定句中,意为“用没法多长时间就”。
5、until和till(1)与肯定句连用,必须是延续性动词。
(2)与否定句属格,必须不为延续性动词,则表示“直至……才,在……之前不……”。
特别注意:notuntil可以用作特别强调句和倒装句强调句:itis/wasnotuntil…that…倒装句:notuntil放句首时,主句要部分倒装。
It引导的时间状语从句总结与练习
高考It +be+ 时间+ 从句”结构总结一在“It +be+ 时间+ 从句”结构中,引导从句的从属连词有before, that, since, until (till ), when 等。
这一结构是近几年高考常考的知识点,现将它们的用法小结如下:一、It +be (not )+ 时间段+before 从句。
其中的主句是肯定式时,意为“过多长时间才……”;主句是否定式时,意为“没过多久就……”。
例如:1. It was not long before the whole country rose and drove the Austrian soldiers from their homeland. 不久,全国人民便奋起反抗,把奥地利军队从他们的国土上赶了出去。
2. It may be five or six years before the new medicine is tested on human beings.要过五六年时间这种新药才能在人身上做试验。
3. It was two months before he designed the bridge. 过了两个月,他设计出了这座桥梁。
二、It +will be (was )+ 时间段+until 从句若主句中用一般将来时,则从句中用一般现在时,意思是从现在起到从句中谓语动词表示的动作发生时还有多长时间;若主句中用一般过去时,则从句中也用一般过去时,意思是从过去某一时间起到从句中谓语动词表示的动作发生还有多长时间。
例如:1. It will be ten days until my birthday comes. 到我生日还有十天。
2. It was only five minutes until her husband came back from work.当时离她丈夫下班只有五分钟了。
注意:结构“一”与结构“二”在肯定句中几乎可以通用。
时间状语从句练习题及答案
时间状语从句练习题及答案精品文档时间状语从句练习题及答案由从句担任的状语,在句子中可修饰谓语、形容词、副词或是整个句子,它可以用来表示时间、地点、原因、目的、结果、条件、方式、比较、让步等。
状语从句是一较大的语法项目,也是近几年高考题中常见的一个重要试点。
高考中已考查了时间、让步、地点、条件、目的等状语从句,这些从句仍是今后高考热点,应作充分准备。
同时对方式状语从句也应引起重视。
时间状语从句表示时间的状语从句可由when, as, while, whenever, after, before,till , since, once, as soon as , by the time, no sooner … than, hardly … when, every time等引导。
e.g. When I came into the office, the teachers were having a meeting.He started as soon as he received the news. Once you see him, youwill never forget him. No sooner had I gone to bed than I went to sleep.原因状语从句原因状语从句是表示原因或理由的,引导这类从句的最常用的连词是because, since, as , now that等,for 表示因果关系时为并列连词,语气不如because强。
e.g. He is disappointed because he didn’t get1 / 23精品文档the position.As it is raining, I will not go out. Now that you mention it, I do remember.地点状语从句引导地点状语从句的连词是where 和wherever等。
It-…+点时间段时间+before…诠释
It …+点时间/段时间+before…诠释高中英语中,before句式,相似性强,考生易混淆,究其用法,现小结于后,敬供商榷。
1. It was / will be + 段时间+ before …在“It was / will be + 段时间 + before 从句”结构中,before是从属连词,表示“……才;……就”,引导时间状语从句。
例:It was just 3 days before the book was published.三天后那本书就出版了。
例:It will be five years before we meet again.五年后我们才会在见面。
2. It wasn’t long before …/ It won’t long before …在“It wasn’t long before从句”结构中,before是从属连词,表示“不久以后就……”;而“It won’t long before从句”结构中,before是从属连词,意为“不久就会……”,引导时间状语从句。
例:It wasn’t long before he came home.他不久后才(很快)回到了家里。
例:It won’t long before you get well again.不久你就可以恢复健康了。
3. It be + 点时间+ before …在“It be +点时间 + before从句”结构中,before是从属连词,表示“在……之前;时间是……”,引导时间状语从句。
例:It was 4:00 before he came to see you.他是四点后来看你的。
4. It be + 点时间+ when …在“It be +点时间 + when从句”结构中,when是从属连词,表示“当时是……”,引导时间状语从句。
例:It was 4:00 when he came to see you.他来看你时,已是四点了。
时间状语从句讲解和练习(答案)(可编辑修改word版)
时间状语从句用句子表达一件事情或一个行为发生的时间,这个句子就叫时间状语从句。
时间状语从句根据其所表示的时间不同,所使用的连词也不同。
下面我们一起来看一下几个常见的时间状语从句:1. when 引导的从句:表示主句的动作和从句的动作同时发生,或从句的动作发生在主句动作之前。
例如:I was going out when a visitor came. (动词动作同时发生。
)我正要出门,有客人来访。
I shall tell her the good news when she comes.她来时,我将告诉她这个好消息。
小试牛刀:I found mother cooking for me. I got home.(when)He was listening to the radio when I home. (get)2. while 引导的从句:表示“当……过程中”,强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。
由于while 从句表示一个持续的行为,所以从句中要用持续性动词,并且持续性动词常用进行时态。
例如:Keep an eye on my little sister while I am away.我不在时,请照看一下我的小妹妹。
While we were watching TV, Jim came in. 我们看电视的时候,Jim 进来了。
小试牛刀:It started to rain. We were playing football.(while)Lucy was cleaning the room Lily was listening to music.3. as 引导的时间状语从句:表示“当……的时候;一边……一边……;随着……”,其从句的主语与主句的主语往往是同一人或物。
例如:She sang as she worked. 她一边工作一边唱歌。
=She was singing as she was working.I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。
高中时间状语从句及练习(含答案)
状语从句状语从句在句中作状语,修饰主句中的动词、形容词或副词等。
状语从句放在主句之前时,常用逗号分开;放在主句之后,一般不用逗号。
状语从句按其意义和作用可分为时间、原因、地点、条件、让步、目的、结果、方式、比较等9种。
1.时间状语从句时间状语从句表示主句动作发生的时间,主要由when,while,as ; before, after; till (until); once, by the time, as soon as, no sooner ... than和hardly ... when及名词词组the moment等引导。
1) when“在……的时候”; while “在……期间”; as “正当……的时候”when意为“在……的时候”,强调“特定时间”。
When spring came, he felt like a trip.When he was eating his breakfast, he heard the doorbell ring.说明:连词when在状语从句中还有如下几种含义:①表示突然发生的事,含义为“(正在……时)忽然”。
I was just coming along to see you when I ran into Wilson.I had been working a couple of months when I had a letter from Jane.②表示过早发生某事,意为“(还没……)就”。
此含义有时可用before代替。
I hadn’t been reading for half an hour when I heard steps outside.我刚读了不到半个小时就听到外面有脚步声。
I had been there little more than a week when I set to work in earnest.③表示“在……的情况下”,常可译为“虽然”,“既然”,“如果”。
(完整版)It的用法总结
(完整版)It的用法总结It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词),也可以用作引导词(作形式主语或形式宾语),还可以用来构成强调句型。
.it用作代词(1) 用作人称代词在句子中作主语或宾语;指前面已经提到过的事物、动物或人,且it指特定的事物;如果指前文中提到的事物中的任何一个,用one。
one可以与any, each, every, not等连用,但one 不可代替不可数名词。
—where’s your car?—it’s in the garage. 你的汽车在哪儿呢?在车库里。
(指代物品your car)did you hit it? 你打中了吗? (指代事件)the baby cried when it was hungry.这婴儿饿时就哭。
(指代婴儿,尤指性别不详或无所谓时)—who is that?—it’s me. 是谁?我。
(指一定情景中所确定的人或事物,此时相当于指示代词,代指this和that,有时也指人)—what’s this?—it’s a box. 这是什么?一只箱子。
(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时,it通常不一定译出来。
it’s a long time since they left. 他们走后很久了。
it’s two miles to the beach.离海滨有两英里远。
that’s just it—i can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音,我工作不了。
另外,需要注意两点:(1)“it’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。
如:it’s time for supper. it’s time to have supper.(2) “it’s time…”后面还可以接一个从句,但是从句中的谓语动词一定要用过去式即虚拟语气,如:it’s time we had lunch.是我们吃饭的时候了。
高考英语It引导的强调句型讲解
高考英语It引导的强调句型讲解一、考点分析表达强调的方式有很多,本章重点学习It引导的强调句。
强调句的考察主要体现在语法填空和翻译题型上。
难点在于该知识点会与其他句型混在一起考察,要准确区别。
二、专题详解一)结构结构详解:针对句子My brother met Li Ming at the railway station yesterday.进行强调1、基本结构强调主语:It was my brother that/who met Li Ming at the railway station yesterday.强调宾语:It was Li Ming that/who my brother met at the railway station yesterday.强调地点状语:It was at the railway station that my brother met Li Ming yesterday.强调时间状语:It was yesterday that my brother met Li Ming at the railway station.2、一般疑问句结构:对主语提问:Was it my brother that/who met Li Ming at the railway station yesterday?后面几句同上,只需将was提到it之前即可。
3、特殊疑问句结构:对主语提问:Who was it that met Li Ming at the railway station yesterday?注意:当用who提问时,为避免重复,连接词用that后面几句同上,用疑问代词/副词代替被强调部分即可。
【即学即用】1) _____ electricity plays an important part in our daily life ?A. Why was it thatB. Why is it thatC. Why is itD. Why it is that2) Who was it _____ wanted to see me just now ?A. t hatB. whoC. whenD. when3) _____ you met the foreigner from Canada?A. Where it was thatB. Who it was thatC. Where was it thatD. Where was that二)使用注意1、主谓一致It is your father who is wrong this timeIt is his parents who have come to China.主语谓语:保持一致总结归纳:主谓一致:被强调部分作主语时,其形式与谓语动词在人称和数上保持一致。
It引导的时间状语从句总结与练习
It引导的时间状语从句总结与练习【Keys:1、D2、B3、C】(二)Itwillbe+时间段+before+一般现在时的从句“要过多久/不久…才…”Itwas+时间段+before+一般过去时的从句“过了多久才…”“before”句型和“since”句型的共性都加时间段,差异在于前后的时态和翻译。
Eg:①ItwillbetenyearsbeforeIreturnhome.译为:要过十年我才能回家.②Itwastenyearsbeforehefoundhislostboy.译为:过了十年他才找到了他失踪的儿子.练习:1、Itisreportedthatitmaybetwoorthreemonths_____itispossibletotestthismedic ineonanimals.A:sinceB:afterC:beforeD:when2、-Howlongdoyouthinkitwillbe______Chinasendsamannedspaceshiptothem oon?-PerhapstwoorthreeyearsA:whenB:untilC:thatD:before3、Howlongdoyouthink____thecomputercompanybringsoutanewproduct?(2005.上海)A:itwillbebeforeB:willitbeuntilC:willitbewhenD:itwillbethat 【Keys:1、C2、D3、A】(三)Itwillbe+时间点+when+一般现在时的从句Itwas+时间点+when+一般过去时的从句与“before”句型比较:前后时态一致与“since”、“before”句型强调的是时间段,而”when“句型强调的是时间点。
Eg:①ItwillbemidnightwhenIreturnhome.译为:我回到家的时间将是午夜.②Itwasnoonwhentheaccidenthappened译为:事故发生时已是正午.练习:1、___was1979____Igraduatedfromuniversity(1997.上海)A:That;thatB:It;thatC:That;whenD:It;when2、Itwasbreakfast_____ourteacherpunishedme(2004.北京)A:whenB:untilC:sinceD:before【Keys:1、D2、A】(四)Itis(was)+时间点+that的强调句型强调句仅是形似,与“when”句型的比较很明显:1.强调句时间点部分通常带有介词;2.去掉itis(was)……that之后,句子整合成一个完整的句子。
初中英语状语从句和练习题(含答案)
状语从句的分类一、时间状语从句时间状语从句表示时间,引导词有:when, while, as, till, until before, after, since 等。
时间状语从句的引导词所表示的意思不尽相同,要注意把握不同引导词所表示的不同时间关系,以及它在具体句子中对应的时态、语态等问题。
注意: as(在⋯⋯时候,因为), since (自从,因为),它们可以引导时间从句,并强调主句和从句的动作同事发生。
并且 while 有时还可以表示对比。
例如:( 1)While my mother was reading the newspaper, I was watching TV.(read 是延续性的动词, read 和 watch 同事发生)I like playing football while you like playing basketball. 我喜欢踢足球,而你喜欢打篮球。
(对比)(2) when(当⋯⋯的时候),引导的从句的谓语动词可以是延续性动词,也可以是瞬间动词。
从句动作可与主语动作同事发生,也可在其后发生。
I was reading a book when she came into my room.(come 是瞬间动词,只能用 when 引导,不能用 while)I often missed my home when(while) I lived in NewYork. ( live 是延续性动词, when 可用while 代替)( 3)when 和 while 的区别还在于: while 引导的时间状语从句多用于进行时态,而 when 引导的时间状语从句多用于一般时态。
While they were talking, the bell rang. 正在他们谈话的时候,上课铃响了。
( 4)as 译作“一边⋯⋯一边”、“随着⋯⋯”,侧重主句和从句的动作同时发生。
有时可与when, while 通用。
高中时间状语从句及练习(含解答)
高中时间状语从句及练习(含解答)状语从句是用来修饰主句中的动词、形容词或副词等的从句。
当状语从句放在主句之前时,通常需要用逗号分隔;而当放在主句之后时,则不需要逗号。
根据其意义和作用,状语从句可分为时间、原因、地点、条件、让步、目的、结果、方式和比较等九种类型。
1.时间状语从句时间状语从句用于表示主句动作发生的时间,通常由when、while、as、before、after、till (until)、once、by the time、as soon as、no sooner。
than和hardly。
when等引导词,以及名词词组XXX等构成。
其中,when表示“在……的时候”,强调“特定时间”。
例如:When spring came。
he felt like taking a trip.When he was eating his breakfast。
XXX.需要注意的是,连词when在状语从句中还有其他含义。
比如,它可以表示突然发生的事,含义为“(正在……时)忽然”;可以表示过早发生某事,意为“(还没……)就”;还可以表示“在……的情况下”,通常译为“虽然”、“既然”、“如果”等。
举个例子:I was just coming along to see you when I ran into Wilson.I hadn’t been reading for half an hour when I heard steps outside.She refuses help when (although) she has many friends.Why do you walk when (since) you have a car?How can I make them understand if they refuse to listen to me。
It's frustrating when you XXX。
It句型归纳最全总结
It 句型归纳总结I.It 作形式主语的句型①It + be + adj (kind , wise , careless, clever…) + of sb to do sthEg: It is wise of him to make such a decision.他做出这样的决定是明智的。
②It + be + adj(easy , safe , common , normal …) + for sb to do sth该句型中adj若为important, necessary, natural, possible, strange, vital, essential等可改为从句,从句用should+动词原形。
.Eg: It’s very dangerous for children to play with fire.It is important for us to learn English well. (= It is important that we (should) learn English well.)③It + be +V-ed( reported, believed, said, suggeste d…) + that 从句该句型中:⑴若V-ed为reported, believed, said等常译为“据报道”,“据认为”,“据说”。
⑵若V-ed为suggested, ordered, demanded, insisted等表示“建议”,“命令”的词,从句要用虚拟语气(should)+动词原形。
Eg: It is suggested that the book (should) be revised.It’s said that Tom has been back from abroad. (=Tom is said to have been back from abroad.)④It + be + n (a pity, a shame, a fact , good new s…) + that 从句:该句型中,从句一般用(should) + 动词原形,表示出乎意料,常译为"竟然"。
考点02 时间状语从句解析版
考点02 时间状语从句(一轮复习)itte gir wa about to go to choo omething eriou haewor carefuA Ever timeB For ever timeC At each timeD Ever time when【答案】 A【解析】句意:每次在办公室看到马小姐,她都是仔细检查我们的作业。
ever time”每次“,此处引导时间状语从句,故选A。
【总结】考查状语从句,本题涉及ever time引导的时间状语从句。
wa the midde of the night the ound of the e uent ha taen ome meaure to ove the hortage of eectricit, but it ma be ome time ________ the ituation im ________ the teeidde of the night ________ m dad woe me ue to watch the footba gameA whenB thatC whichD a【答案】 A【解析】句意:我爸爸把我叫醒叫我去看足球比赛时,时间已经是半夜了。
句中it指代时间,m dad woe me ue to watch the footba game是时间状语从句,用when引导。
故选A。
【总结】考查状语从句,本题涉及when引导的时间状语从句。
habb houe coaan outA whenB beforeC afterD unti【答案】 B【解析】句意:士兵还没来得及把老妇人扶出来,破旧的房子就倒塌了。
分析句子可知,before意为“尚未……就,没来得及……就”,常用于before b can /coud…故选B。
【总结】考查状语从句,本题涉及before引导的时间状语从句。
wi be a cou BritainA inceB thatC beforeD unti【答案】 C【解析】句意:迈克要过几天才能从英国回到中国。
(完整版)职场时间状语从句语法及练习
(完整版)职场时间状语从句语法及练习一、语法介绍时间状语从句是一个从句,用于描述一个动作或事件发生的时间或条件。
它通常以连接词引导,主要分为以下几种类型:1. 当时间状语从句说明一个动作或事件与主句动作同时发生或持续发生时,请使用"when" 或 "while" 连接词。
- 例如:"When I arrived at the office, my colleague was already there."2. 当时间状语从句说明一个动作或事件发生在主句动作之前时,请使用"before" 连接词。
- 例如:"Before the meeting starts, make sure to review your presentation."3. 当时间状语从句说明一个动作或事件发生在主句动作之后时,请使用"after" 连接词。
- 例如:"After I finish this report, I will take a break."4. 当时间状语从句说明一个动作或事件发生在主句动作的一段时间之后时,请使用"after" 连接词加上一段时间状语词。
5. 当时间状语从句说明一个动作或事件发生在主句动作的一段时间之前,请使用"before" 连接词加上一段时间状语词。
- 例如:"Before you leave the office, remember to turn off the lights."二、练题请根据句子的意思,填写适当的时间状语从句。
1. _________ you finish the report, please send it to me.2. I will call you back _________ I have a break.3. _________ she arrived at the office, the meeting had already started.4. Make sure to finish the tasks _________ the end of the day.5. _________ he left the office, he locked the door.答案:1. When2. when3. When4. by5. Before。
时间状语从句+习题练习(含答案)
专题: 时间状语从句在下列空格中填入适当连词。
1._________he comes tomorrow,I will ask where he has been.2._________he was speaking,everybody listened carefully.3.I saw her just now_________she was getting off the train.4.Have a good look at that man________you pass him.5.It was already eight o'clock_________we got there.6.I was about to go out_________a visitor came.7.We'll go to the country at the beginning of June,_________the summer harvest will start.8.He learned to speak German_________he was in Berlin.9.Henry is in charge of the office________Mr.Smith is away.10.I listen to the recorder_________I have time.11.He had learned Chinese_________he came to China.12._________the work was done,we sat down to sum up experience.13.I haven't seen him_________he moved to the other side of the town.14.I waited________ he came back.15.I didn’t recognize him________he took off his eyeglasses.16.She likes everything to be in place________she starts to work.17.The thieves ran away_________they caught sight of the police.18.They decided to go back home_________their money ran out.19.__________I get to the airport,I will phone you to pick me up.20.They were about to leave______it began to rain.Keys:1.When2.While/When3.as4.when/as5.when6.when7.when8.while9.whi le10.whenever11.before12.After13.since14.till/until15.until16.before17.as soon as18.before19.As soon as20.when。
It-+-will-be-+-时间段-+-before等表示“在……之后……才”的句型总结
It + will be + 时间段 + before等表示“在……之后……才”的句型总结一、用于句型“It + will be + 时间段 + before...”句型中,表示“要过多久才…”,也可用于“It + may be + 时间段 + before...”,表示“也许要过多久才……”。
Before 后的句子中用一般现在时态。
其否定形式“It will/would not be +时间段+ before…”表示“不久就……,过不了多久就……”。
【典型考例】(1)The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.(2007安徽卷)A. afterB. beforeC.since D. when(2)—How long do you think it will be ______China sends a manned spaceship to the moon? (2006福建卷)—Perhaps two or three years.A. whenB. untilC.that D. before(3)It ________ long before we _______ the result of the experiment.( 上海春招2002) A. will not be...will know B. is...will knowC. will not be...knowD. is...know(4) Scientists say it may be five or six years_________ it is possible to test this medicine on human patients. (2004福建)A. sinceB. afterC. beforeD. when 解析:答案为BDCC。
it的用法及强调结构(附常见考点解析及精选练习题)
it的用法及强调结构I. 作代词1. 用作人称代词,代替前文提到过的事物(是同一物)。
My pen is missing. I can’t find it anywhere.I was disappointed with the film. I had expected it to be much better.2. 代词it有时不特指某件东西,而代表前面提到的整个事情。
Tom’s mother kept telling him that he should work harder,but it didn’t help. (but连接两个并列分句,而不是非限制性定语从句,用it)The weather turned out to be very good,which was more than we could expect. (前面用逗号隔开,没有并列连词,是非限制性定语从句,which指代前面整个主句所表达的内容,用which不用it)3. 用来代替指示代词this,that.--- What’s this ?--- It’s a book.4. 表示时间、距离、天气、价值等。
It’s ten o’clock now.(指时间)---How far is it from here to the station?---It's about two kilometers.(指距离)It is rather cold today, isn't it?(指天气)---What's the cost of the dictionary?---It is twenty dollars.(指价值)5. 可用来指做某个动作的人或与某事有关系的人。
---- Who is making such a noise ? --- It must be the children.II. 引导词it1. 作形式主语,代替由不定式短语、动名词短语或从句表示的真正主语。
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高考It +be+ 时间+ 从句”结构总结一在“It +be+ 时间+ 从句”结构中,引导从句的从属连词有before, that, since, until (till ), when 等。
这一结构是近几年高考常考的知识点,现将它们的用法小结如下:一、It +be (not )+ 时间段+before 从句。
其中的主句是肯定式时,意为“过多长时间才……”;主句是否定式时,意为“没过多久就……”。
例如:1. It was not long before the whole country rose and drove the Austrian soldiers from their homeland. 不久,全国人民便奋起反抗,把奥地利军队从他们的国土上赶了出去。
2. It may be five or six years before the new medicine is tested on human beings.要过五六年时间这种新药才能在人身上做试验。
3. It was two months before he designed the bridge. 过了两个月,他设计出了这座桥梁。
二、It +will be (was )+ 时间段+until 从句若主句中用一般将来时,则从句中用一般现在时,意思是从现在起到从句中谓语动词表示的动作发生时还有多长时间;若主句中用一般过去时,则从句中也用一般过去时,意思是从过去某一时间起到从句中谓语动词表示的动作发生还有多长时间。
例如:1. It will be ten days until my birthday comes. 到我生日还有十天。
2. It was only five minutes until her husband came back from work.当时离她丈夫下班只有五分钟了。
注意:结构“一”与结构“二”在肯定句中几乎可以通用。
但是,若从句中谓语动词表示的将来动作一定或预期肯定会发生,则多用until 引导从句;若从句中谓语动词表示的将来动作在客观上并非一定要发生时,则多用before 引导从句。
三、It +is / has been (was )+ 时间段+since 从句在这一结构中,主句常用一般现在时、现在完成时或一般过去时。
如果since 引导的状语从句中的谓语动词为非延续性动词,则表示“自从状语从句中的动作发生以后,时间过不了多久”。
例如:1. It is two years since Jim came to China.吉姆来中国两年了。
2. It has been three years since they got married.他们结婚已经三年了。
如果since 从句中的谓语动词为延续性动词,则表示“自从从句谓语动词表示的动作结束以来,时间已过了多久”。
例如:3. It is / has been a year since he smoked.他戒烟已经一年了。
四、It +is / was + 时间点+when 从句在这一结构中,时间之前没有介词,从句为when 引导的时间状语从句。
从句常用一般过去时,意为“当某事发生时,时间是……”。
例如:1. It was October 1st, 1949 when the People's Republic of China was founded.中华人民共和国成立于1949 年10 月1 日。
2. What time was it when you got to school你几点到的学校。
五. It is /was + 时间状语+that 从句这是一个强调句型,被强调的部分是时间状语。
表示“正是在某个时间,某事发生了”。
例如1. It was ten years ago that he joined the army. 他正是在十年前参的军。
2. It was yesterday afternoon that I met him in the street.就是在昨天下午我在街上遇见了他。
六、It is / was +first time / second time + (that )从句在这一结构中,time 前面常用序数词来修饰,that 引导的是定语从句,从句中常用现在完成时态或过去完成时态,表示“这是第……次做某事”。
例如:1. This is the first time in my life that I have come to Beijing.这是我一生中第一次来北京。
2. It was the third time that he had asked the same question. 这是他第三次问同一个问题。
七、It is (high )time +that 从句在这一结构中,that 从句中的谓语动词常用虚拟语气,即“should + 动词原形”或用动词的过去式,表示“该做某事了”。
例如:1. It is high time that we began our work. 我们该开始我们的工作了。
2. It is time that he left the place. 他该离开那个地方了。
“It +be+ 时间+ 从句”结构总结二例1:It is almost five years_____we saw each other last time.(05北京)例2:-Did Jack come back early last night was not yet eight o ‘clock________he arrived home.例1.正确答案:B我们已经有5年没见面了。
例2.正确答案:B他回家时还不到8点这类考题出现频率较高,考生又极易混淆,在复习中做出归类非常必要:is/has been+时间段+since+一般过去时例1:It is/has been10years since he came here.这类句型可转化为:=Ten years has passed since he came here. 这一句型可扩展为:It was+时间段+since(从句用过去完成时)例2:It was years since he had arrived in China.(过去是+since+过去完成时) 需要注意的是since从句的谓语动词一般是非延续性动词,但有时也可用延续性动词或表示状态的词,此时需要注意句子的翻译:例3:It is three years since she came to our class.她来我们班已经有三年了。
It is three years since she was in our class.她离开我们班已经有三年了。
+was+时间点+when clause(从句谓语用一般过去时) will be+时间点+when clause(从句谓语用一般现在时表将来)例1:It was already evening when he came back.当他回家时已经8点了。
例2:It will be midday when they get home.当他们到家时将是中午。
+will(not)be+时间段+before+现在时was(not)+时间段+before+过去时例1:It will be another year before he comes here.例2:It was some time______we realized the truth.(2005山东24)例2:正确答案:D。
过了一段时间后我们才了解了真相。
该句型中before前常用时间段,表示“…之后才…”“在…之前就…”;有时before前也可以用时间点,此时突出表示动作的变化。
试比较:例3:It was evening before we reached the little town of Tailstocks. 当我们到达Tailstocks时已经黑了。
(到达前天还没有黑)This is+the+序数词+时间+定语从句(从句用完成时)例1:It is the first time(that)I have been here.(定语从句) 该句型可扩展为:It was+序数词+时间+定语从句(从句用过去完成时)例2:It was the second time he had been out with her alone.例3:It’s the second time you________late this week. 正确答案:C。
这是这个星期你第二次迟到了。
is+(high)time+that+did(虚拟语气)例1:It is(high)time(that)we stopped pollution. 其中that引导得从句中也可用should+V(原型)例2:It is(high)time(that)you came/should come here. 写作中表示建议时也常可用这类句型。
例3:It‘s high time we took measures to solve this problem.注意应将以上5种句型与强调时间的强调句型的区别。
be+时间(被强调部分)+that例1:It was at6o’clock that we heard the noise.例2:It was3years ago that he joined the army. 最简单的判断方法是:当表示时间的词前有介词或者后有副词时,一定是强调结构,必用that。
试比较下面句式与强调句的不同之处:It was already ten o‘clock when he arrived. It is ten years since I met you last. It was quite some time before he found the elephant at all. 以上几句中时间前无介词后没副词故不是强调句型。
《动手练一练》:was not until1936________basketball became a regular part of the Olympic Games.will not be________we meet again. before long after after3.──He was nearly drowned once. ──When was________ ──________was in 1998when he was in middle school. ;It;This;It;Thiswas evening________we reached the little town of Winchester.(04天津)5Scientists say it may be five or six years_it is possible to test this medicine on human patients.was______I met in London.years that many years since many years ago when years ago that7.-What was the party like ‘s years_____I enjoyed myself so much.was about600years ago___the first clock with a face and an hour hand was made.(Keys:AAADCDDA 1正确答案:A 2正确答案:B )历年高考单选题例1:I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back.A. beforeB. sinceC. tillD. after例2:-Did Jack come back early last night was not yet eight o ‘clock________he arrived home.这类考题出现频率较高,考生又极易混淆,在复习中做出归类非常必要:1.It is/has been+时间段+since+一般过去时如:It is/has been5years since he came to our school. 这一句型可引申为:It was+时间段+since(从句用过去完成时) 如:It was10 years since he had arrived in China. 需要注意的是since从句的谓语动词一般是非延续性动词,但有时也可用延续性动词或表示状态的词,此时需要注意句子的翻译:如:It is three years since she came to our class.她来我们班已经有三年了。