高考英语 易错词汇解析 whenwhileas辨析
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语法点拨:when, while和aswhen, while和as都可意为“当……的时候”,引导时间状语从句。
如:When the teacher came into the classroom, all the students were reading the text.老师走进教室时,所有的学生都在读课文。
Kate came in while I was watching TV last night.昨晚我看电视时,凯特进来了。
They talked as they walked.他们边走边谈。
【注意】(l)when引导的从句与主句动作先后发生时,不能与while或as互换。
如:When he finished his homework,he had a short rest当他做完家庭作业后,稍稍休息了一下。
(此处的when相当于after)(2)when引导的从句中为非延续性动词时,不能用while或as替换。
如:We were having breakfast when the door bell rang.我们正在吃早饭,这时门铃响了。
When he came just now, we were playing computer games.刚才他来时,我们正在玩电脑游戏。
(3)当从句的谓语动词是延续性动词时,when,while和as才有可能互换。
When/While/As we were still laughing, Mr Green came in.正当我们仍在嬉笑时,格林先生进来了。
(4)当从句的谓语动词是非延续性动词,而且主句的谓语动词也是非延续性动词时,when和as可互换,而且用as比用when在时间上更为紧凑,有“正当这时”之意。
如:He came just as/when I reached the door.我刚到门口,他就来了。
(5)从句的谓语动词如果表示状态,常用while。
高考英语状语从句学案:whenaswhile的区别(核心考点)13.As [When] a boy, he lived in Japan. 他小时候在日本。
14.When [While] in trouble, ask her for help. 遇到麻烦的时候你就去找她帮忙。
【归纳】1.若主句表示的是一个短暂性动作,从句表示的是一个持续性动作,三者都可用:2.as 用于引出一个持续性动词表示“在……期间”时,其谓语通常只能是那些含有动作(action)和发展(development) 意味的动词,一般不能是那些不用于进行时态的动词(如 be, seem, love, want, agree, see, know, have 等),所以句中的 while 不能换为 as.3.若主、从句表示两个同时进行的持续性动作,且强调主句表示的动作延续到从句所指的整个时间,通常要用 while:4.若主从句表示的两个同时进行的动作含有“一边…一边”之意思,通常用 as:5.若从句是一个短暂性动作,主句是一个持续性动作,可用 as / when 但不用 while:6.若主从句表示的是两个同时(或几乎同时)发生的短暂性动作,用 as / when:7.(7.8句)若要表示两个正在发展变化的情况,相当于汉语的“随着”,一般用 as:8.表示“每当…的时候”(暗示一种规律性),一般要用 when:9.若主从句所表示的动作不是同时发生,而是有先后顺序时,一般要用 when:10.(11.12句)when 可用作并列连词,表示“这时(突然)”;while 也可以用作并列连词,表示“而”、“却”(表示对比);但 as 则没有类似用法:11.as 和 when 后均可直接跟一个名词,构成省略句,但 while 一般不这样用:13.when 和 while 后可接现在分词、介词短语、形容词等构成省略句,但 as 一般不这样用:when, as, while的区别相同点:表示主句的动作发生在从句的较长动作过程中,when,while ,as均可使用。
when,while,as,since的用法大总结以及练习题一.Since作为介词,后接某一确定的时间点,主句谓语动词是持续性动词,常与现在完成时态、现在完成进行时态或过去完成时态连用。
例如:1、He left the village in 1982 and I haven’t seen him since then.1982年他离开这个村子,从那以后我再没见过他。
2、She’s been working in a bank since leaving school.她中学毕业后就一直在一家银行工作。
3.He had spoken to her only once since the party. 自从那次聚会以来,他只跟她说过一次话。
二.Since作为副词,表示从过去以来、以后或到现在的情形或状态,常与现在完成时态连用。
例如:1.He left home two weeks ago and we haven’t heard from him since. 他两周前离开了家,到现在我们一直没有他的消息。
2.He came to Zhenjiang 6 years ago and has lived here (ever) since.他6年前来到镇江,从此便住在这里。
三.since引导原因状语从句作为连词,since可引导原因状语从句,表示因为;既然;鉴于:例如:1.He didn’t come since he was busy.他因为忙,所以没有来。
2.Since this method doesn’t work,let’s try anoter.既然这种方法不行,我们就试用另一种吧。
四.Since在特殊句型中的应用句型I:“It is(has been)+时间+since+持续性动词的过去时”,表示“自从……以来到现在已有多久。
”例如:It has been quite some time since I was last in London.我上次离开伦敦至今颇有一段时间了。
When,While,As引导时间状语从句的区别when,while,as显然都可以引导时间状语从句,但用法区别非常大。
一、when可以和延续性动词连用,也可以和短暂性动词连用;而while和as只能和延续性动词连用。
① Why do you want a new job when you’ve got such a good one already?(get为短暂性动词)你已经找到如此好的工作,为何还想再找新的?②Sorry,I was out when you called me.(call为短暂性动词)对不起,你打电话时我刚好外出了。
③Strike while the iron is hot.(is为延续性动词,表示一种持续的状态)趁热打铁。
④ The students took notes as they listened.(listen为延续性动词)学生们边听课边做笔记。
二、when从句的谓语动词可以在主句谓语动作之前、之后或同时发生;while和as从句的谓语动作必须是和主句谓语动作同时发生。
1.从句动作在主句动作前发生,只用 when。
①When he had finished his homework,he tooka short rest.(finished先发生)当他完成作业后,他休息了一会儿。
②When I got to the airport,the guests had left.(got to后发生)当我赶到飞机场时,客人们已经离开了。
2.从句动作和主句动作同时发生,且从句动作为延续性动词时,when,while,as都可使用。
①When /While /As we were dancing,a stranger came in.(dance为延续性动词)当我们跳舞时,一位陌生人走了进来。
②When /While /As she was making a phone call,I was writing a letter.(make为延续性动词)当她在打电话时,我正在写信。
常见连词辨析while,when 与 as1、while意为“当……的时候”或“在某一段时间里”。
主句的动作或事情在从句的动作或事情的进展过程中发生,从句的动词一般要用延续性动词。
在when 表示a period of time时,两者可以互换。
2、when 意为at or during the time that,既可表示在某一时间点的时候,又可表示在某一段时间内,主句与从句的动作或事情可以同时发生也可以先后发生。
3、as表示“当……的时候”时,往往和when/while通用,但它着重强调主句与从句的动作或事情同时或几乎同时发生。
He fell asleep while/when reading.他读着书就入睡了。
It was raining when we arrived.我们到达的时候,天正下着雨。
(强调时间点)When we were at school,we went to the library every day.我们上学的时候,每天都去图书馆。
(强调在一段时间内)She came up as I was cooking.我在做饭的时候,她来了。
(强调同时)He dropped the glass as he stood up.他站起来时,把杯子摔了。
(强调几乎同时)because,since,as与 for1、because 语气最强,表示直接的原因,是说话人认为对方不知道的原因。
它引导的从句常位于主句之后,只有为了强调或承前才可位于主句之前。
2、since有”既然“之意,是把大家已知的事实作为理由或背景,即所述原因是显而易见或彼此知晓的,它引导的从句一般位于主句前。
有时也可位于主句后。
3、as表示原因时,语气最弱,一般不需要将其翻译出来。
4、for是并列连词,引导的分句只能位于另一个分句之后,在表示原因的时候,for和because一般可以互相代用。
但若是对前句内容的解释或推断时,不能用because替代。
时间状语从句讲解与练习when, while和as 引状从句的用法三个的意思很,都有“当⋯⋯候”的意思, 但又有区。
一、 when 的用法察下面的句子:1.When he was a child he was always trying out new ideas. 他小候就常常一些新的想。
2.When she came into my room, I was just reading a book. 她走我房,我正在看。
3.Were you writing when the teacher came in? 老来的候,你在写信?4.Sorry, I was out when you called me. 不起,你打来的候我出去了。
5.He was leaving when someone knocked at the door. 他正要走,有人敲。
6. I thought of it just when you opened your mouth.就在你要的候,我也想到了。
根据以上的例句,我可以出一点:when 从句中的 A 事件,相当于主句中 B 事件生的点。
也就是,when从句的重点不在作本身生的状,而只是把它作一个点,所以when从句多数情况下用的是一般去,而不用行, 而且, when从句的大多是短性。
种法也可以参照。
上, when 从句也可以有其它的,但几乎也不用行,因它也只是作一个参照点。
例如:When the manager comes here for a visit next week, I’ll talk with him about this.下周,理来参,我会和他此事。
When 的特殊用法:主句(行)when 从句(一般)I was walking along the street when a ball hit me on the head.我正沿着路着,就在一个球打在了上。
高考英语词汇详解:as,when,while的用法区别详解(学习版)编制人:__________________审核人:__________________审批人:__________________编制学校:__________________编制时间:____年____月____日序言下载提示:该文档是本店铺精心编制而成的,希望大家下载后,能够帮助大家解决实际问题。
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中考的词语辨析aswhenwhi...中考的词语辨析 as when while 怎样区别? at on in 怎样区别? because for since as 其区别为?as,when,while这三个词都有“当……时候”之意,但用法有所不同。
when意为“在……时刻或时期”,它可兼指“时间点”与“时间段”,所引导的从句的动词既可以是终止性动词,也可是持续性动词。
as意为“一边……一边……”或“与……同时”,重在表示动作同时发生、伴随进行。
while只指“时间段”,不指“时间点”,从句的动词只限于持续性动词。
on,at,in这三个常用介词都可以表示时间和地点,但具体用法不同,不少初学者对它们混淆不清。
现在请读、记下面两个口诀,只要记住了口诀,就可避免at,on,in的种种误用。
(1)口诀之一(on,in,at表时间)。
on“在具体某一天”“当某时”,动名词前, arrival,death记心间early,late位句先,用in一般“上”“下”“晚”at是个时间点,“工作”“时刻”与“圣诞注:①on表示在具体某一天及具体某一天的上午、下午和晚上。
例:On Children’s Day,all the boys and girls are wearing their newclothes.儿童节,所有的孩子们都穿上了新衣服。
②On my arrival home,I found he had gone already.当我到家时,我发现他已经走了。
③当early,late用于句首修饰介词短语时,尽管表示具体某一天的上午、下午、晚上,都要用in泛指一般的上、下午,晚上也用in④用于将来时态表示“过一段时间后”及表示“在……期间和“在某个季节,某年、某月)都用in。
⑤在表示某时某刻及在work,Christmas前用at。
(2)口诀之二。
at用于点,on用于天, in用于月、季、年。
午别晚上in常用,限定三时in要变。
when,as,while的区别when,as,while的区别1.He fell asleep when [while, as] he was reading. 他看书时睡着了。
2.While you’re there, can you get me some stamps?3.I kept silent while he was writing. 在他写的时候,我默不作声。
4.She sang as she went along. 她边走边唱。
5.It was raining hard when [as] we arrived. 我们到达时正下着大雨。
6.I thought of it just when [as] you opened your mouth. 就在你要说的时候,我也想到了。
7.Things are getting better and better as time goes on. 随着时间的推移,情况越来越好。
8.As it grew darker, it became colder. 天色越晚,天气越冷。
9.He smiles when you praise him. 你夸奖他时他总是笑笑。
10.I will go home when he comes back. 他回来时,我就回家去。
11.We were about to start when it began to rain. 我们正要出发,这时天开始下雨了。
12.He likes coffee, while she likes tea. 他喜欢咖啡,而她却喜欢茶。
13.As [When] a boy, he lived in Japan. 他小时候在日本。
14.When [While] in trouble, ask her for help. 遇到麻烦的时候你就去找她帮忙。
【归纳】1.若主句表示的是一个短暂性动作,从句表示的是一个持续性动作,三者都可用:2.as 用于引出一个持续性动词表示“在……期间”时,其谓语通常只能是那些含有动作(action)和发展(development) 意味的动词,一般不能是那些不用于进行时态的动词(如be, seem, love, want, agree, see, know, have 等),所以句中的while 不能换为as.3.若主、从句表示两个同时进行的持续性动作,且强调主句表示的动作延续到从句所指的整个时间,通常要用while:4.若主从句表示的两个同时进行的动作含有“一边…一边”之意思,通常用as:5.若从句是一个短暂性动作,主句是一个持续性动作,可用as / when 但不用while:6.若主从句表示的是两个同时(或几乎同时)发生的短暂性动作,用as / when:7.(7.8句)若要表示两个正在发展变化的情况,相当于汉语的“随着”,一般用as:8.表示“每当…的时候”(暗示一种规律性),一般要用when:9.若主从句所表示的动作不是同时发生,而是有先后顺序时,一般要用when:10.(11.12句)when 可用作并列连词,表示“这时(突然)”;while 也可以用作并列连词,表示“而”、“却”(表示对比);但as 则没有类似用法:11.as 和when 后均可直接跟一个名词,构成省略句,但while 一般不这样用:13.when 和while 后可接现在分词、介词短语、形容词等构成省略句,但as 一般不这样用:when, as, while的区别相同点:表示主句的动作发生在从句的较长动作过程中,when,while ,as均可使用。
高考英语状语从句学案:whenaswhile的区别when,as,while的区别1.He fell asleep when [while, as] he was reading. 他看书时睡着了。
2.While you’re there, can you get me some stamps?3.I kept silent while he was writing. 在他写的时分,我默不作声。
4.She sang as she went along. 她边走边唱。
5.It was raining hard when [as] we arrived. 我们抵达时正下着大雨。
6.I thought of it just when [as] you opened your mouth. 就在你要说的时分,我也想到了。
7.Things are getting better and better as time goes on. 随着时间的推移,状况越来越好。
8.As it grew darker, it became colder. 天色越晚,天气越冷。
9.He smiles when you praise him. 你夸奖他时他总是笑笑。
10.I will go home when he comes back. 他回来时,我就回家去。
11.We were about to start when it began to rain. 我们正要动身,这时天末尾下雨了。
12.He likes coffee, while she likes tea. 他喜欢咖啡,而她却喜欢茶。
13.As [When] a boy, he lived in Japan. 他小时分在日本。
14.When [While] in trouble, ask her for help. 遇到费事的时分你就去找她帮助。
【归结】1.假定主句表示的是一个持久性举措,从句表示的是一个继续性举措,三者都可用:2.as 用于引出一个继续性动词表示〝在……时期〞时,其谓语通常只能是那些含有举措(action)和开展(development) 意味的动词,普通不能是那些不用于停止时态的动词(如 be, seem, love, want, agree, see, know, have 等),所以句中的 while 不能换为 as.3.假定主、从句表示两个同时停止的继续性举措,且强调主句表示的举措延续到从句所指的整个时间,通常要用 while:4.假定主从句表示的两个同时停止的举措含有〝一边…一边〞之意思,通常用 as:5.假定从句是一个持久性举措,主句是一个继续性举措,可用 as / when 但不用 while:6.假定主从句表示的是两个同时(或简直同时)发作的持久性举措,用 as / when:7.(7.8句)假定要表示两个正在开展变化的状况,相当于汉语的〝随着〞,普通用 as:8.表示〝每当…的时分〞(暗示一种规律性),普通要用 when:9.假定主从句所表示的举措不是同时发作,而是有先后顺序时,普通要用 when:10.(11.12句)when 可用作并列连词,表示〝这时(突然)〞;while 也可以用作并列连词,表示〝而〞、〝却〞(表示对比);但 as 那么没有相似用法:11.as 和 when 后均可直接跟一个名词,构成省略句,但 while 普通不这样用:13.when 和 while 后可接如今分词、介词短语、描画词等构成省略句,但 as 普通不这样用:when, as, while的区别相反点:表示主句的举措发作在从句的较长举措进程中,when,while ,as均可运用。
2017高考英语易错词汇解析:when,while,as辨析
when,while,as考点辨析
when,while,as都能引导多种状语从句:
一、when常见考点
1、“当……时候”,引导时间状语从句。
When he was a young man,he was fond of hunting. It was already 10:00PM,when
I finished the work.
2、“正在那时,这时”等于and at that time,引导时间状语从句。
We were having a meeting when someone broke in. We were about to leave when it
began to rain.
3、“既然”等于since 或considering that, 引导原因状语从句。
It was foolish of you to take a taxi,when you should easily walk there in five
minutes. How can they learn anything when they spend all their spare time watching
TV?
4、“虽然,然而,可是”引导让步状语从句。
He usually walks when he might ride. They had only three chairs when they need
five.
二、while常见考点
1、“当……时候”, 引导时间状语从句(从句动作必须是延续性的)。
Please don't talk so loud while others are working. While I was cleaning the
window,my finger was seriously cut.
2、“虽然,尽管”相当于although,引导让步状语从句(常把while放在句首)。
While she is a top student, she has some shortcomings. While the Internet is
bridging the distance between people, it may also be breaking some home or will
cause other family problems.
3、“只要,如果”等于as long as,引导条件状语从句。
There is hope while there is life. While you study hard, your effort will pay
off.
4、“而,然而”,表对比或相反的情况。
He likes pop music,while I am fond of folk music. Kids talk frequently about what
they can do,while many adults do the opposite, tending to talk about what they
can't .
三、as常见考点
1、“一边……一边”或“随着……”,引导时间状语从句(as引导的从句内部的动作
与主句内动作同步)。
John sings as he works. (一边……一边)
Jame‘s blindness was getting worse as he was getting older.(随着……)
2、“因为”, 引导原因状语从句。
As you weren‘t there, I left a message. Perhapshe will need some help as he
was ill.
3、“尽管,即使,虽然” 引导让步状语从句(用于形容词,副词或名词后构成部分倒
装)。
Young as I am, I already know what career I want to follow. Much as I like you,
I couldn't live with you. Child as Tom is , he has been a success.