【when】when用法when的从句主句各可以用哪一种动词.(全部)例..._英语_囧囧囧轆a

编辑: admin           2017-15-06         

    一、作为副词,它有以下的用法:

    1. 作为疑问副词,引导特殊疑问句,意为“什么时候;何时”.

    如: ( 1 ) When will they come back?

    ( 2 ) What time will they come back?

    回答 when 引导的从句,不一定指出具体的时间点.如回答句( 1 )可用 tomorrow, next month 等.而回答 what time 引导的问句,则必须说出具全的时间点,如 at two o'clock, at five past ten 等.

    2. 作连接副词,引导名词性从句或不定式,意为“什么时候”.从句使用陈述句语序,时态根据实际情况而定.

    如: ( 1 ) I'd like to know when they will come. 我想知道他们什么时候来.( when 引导宾语从句)

    ( 2 ) Can you tell me when the bank opens? 你能告诉我银行什么时候开门吗?( when 引导宾语从句)

    ( 3 ) When she'll be back depends much on the weather. 她何时回来在很大程度上取决于天气.( when 引导主语从句)

    ( 4 ) Have you decided when to go sightseeing? 你们已经决定什么时候去郊游了吗?( when 引导不定式结构)

    3. 作疑问代词,常和介词 since, till, up to 等连用,意为“什么时候”.

    如: ( 1 ) Since when have they had the house? 他们从什么时候起有这幢房子的?

    ( 2 ) Till when is the library open? 图书馆开放到几点呢?

    4. 作关系副词,引导限制性定语从句和非限制性定语从句.

    如: ( 1 ) The days are gone forever when the Chinese people were looked down upon. 中国人民被人轻视的日子一去不复返了.

    ( 2 ) The main school holidays are from mid-December till early February, when the days are long and warm. 学校的主要假期是从 12 月中旬到 2 月初,这段时间里白天长而且很温暖.

    ( 3 ) Considering (the time) when these paintings were done, they are in excellent condition. 考虑到这些油画的创作时期,它们保存的状况是极好的.

    ( 4 ) Do you remember (the time) when the three of us went on a picnic? 你还记得我们三个人去野餐的那段时光吗?

    在定语从句中, that 在某些条件下可用来代替 when ,这时其先行词通常是 time, day, moment, year 等.

    如: ( 1 ) His mother died on the evening that he was born. 他母亲死于他出生的那晚.

    ( 2 ) I stay at home on the days that I am not busy. 在我不忙的时候,我就呆在家里.

    在某些含有“时间”的名词词组后面,由于该名词不表示时间,或整个名词词组已用作连词,所以不用 when 引导.如: the moment, the instant, the minute, the second 等等,意为“一……就……”,引导时间状语从句.

    如: ( 1 ) The first time I went to China, I visited Beijing. 我第一次来中国就游览了北京.

    ( 2 ) I thought her nice and honest the first time I met her. 我第一次见到她时就认为她很诚实.

    ( 3 ) The instant I saw him I knew he was my brother. 我一看到他就知道他是我兄弟.

    二、作为从属连词,引导状语从句,表示多种语法意义:

    1. 表示时间,意为“当……时;在……的时候”.

    A. 在时间、条件等状语从句里,用一般现在时表示将来时;当需要表达将来完成的意义时,必须使用现在完成时来代替.

    如: ( 1 ) When you see him, please say hello to him. 见到他时,代我问他好.

    ( 2 ) When you have finished your experiment, please tidy the lab and put everything back in the cupboards. 当你们做完实验后,请把实验室整理好并把物品放回柜子中.

    B. 表示过去发生的事情,在 when 引导的时间状语从句的主从复合句中,动作发生在先的用过去完成时,在后的用过去时.

    如: ( 1 ) When I was in Japan, I bought some beautiful pearls. 我在日本时,买了一些漂亮的珍珠.

    ( 2 ) When I reached the station, the train had left. 当我到达火车站时,火车已经开走了.

    2. 表示前面的叙述所没有提到过的信息.它总是对所描述的事件予以引人注目的强调,意为“这时;突然”;当位于句末的分句具有引种用法时,大致有以下三种情况:

    A. when 分句前面的分句使用过去进行时.

    如: ( 1 ) He was still smiling when the door opened and his wife came in. 他正笑着的时候,门突然开了,他妻子走了进来.

    ( 2 ) I was thinking of this when I heard my name called. 我正想着这件事时,突然听到有人叫我的名字.

    B. when 分句前面的分句使用 was (were) about to, was (were) on the point 等.

    如: ( 1 ) We were about to start when it began to rain. 我们刚要出发就开始下雨了.

    ( 2 ) He was on the point of leaving when someone knocked at the door. 他刚要走就有人敲门.

    C. when 分句之前的分句用过去完成时,其中 sb had hardly / scarcely /barely … when 已成为固定词组.如:

    ( 1 ) We had hardly fallen asleep when the bell rang. 我们刚刚入睡,铃声就响了起来.

    ( 2 ) He had scarcely arrived when he had to leave again. 他刚刚到达就又要离开了.

    3. 表示条件,相当于 if ,引导条件状语从句.

    如: How can I get a job when I can't even read or write? 如果我连读和写都不会,我怎么能找到工作呢?

    4. 表示对比,主要有以下两种情况:

    A. 相当于 whereas, while, since, 意为“既然;然而”.

    如: ( 1 ) How can I help them to understand when they won't listen to me? 既然他们不愿听我的,我又怎么能帮助他们弄明白呢?

    ( 2 ) They have only three copies when we need five. 他们只有三本,而我们却需要五本.

    B. when 从句中使用虚拟语气,意为“本来……却……”.

    如: ( 1 ) She paid when she could have entered free. 本来可以免费入场,而她却付了款.

    ( 2 ) She stopped trying when she might have succeeded next time. 她本来下次有可能获得成功,但她却不再尝试了.

    ( 3 ) They were gossiping, when they should have been working. 他们本该工作,却在那里说别人的闲话.

    5. 由 when 等引导的状语从句,如果主语与主句的主语一致或是 it ,谓语动词又含 be 动词时,主语和 be 动词常常被省略,就变成“ when + V-ing/ V-ed/ adj/ 介词词组”的结构.

    如: ( 1 ) When in Rome, do as Romans do. 入乡随俗.

    ( 2 ) When (we are ) young, we are full of hope. 年轻时,我们大家总是充满希望.

    ( 3 ) Don't reach sideways when standing on a ladder. 站在梯子上时,不要侧着身子去够东西

    互助这道作业题的同学还参与了下面的作业题

    题1: 【when用法】[英语科目]

    一、作为副词,它有以下的用法:

    1. 作为疑问副词,引导特殊疑问句,意为“什么时候;何时”.

    如: ( 1 ) When will they come back?

    ( 2 ) What time will they come back?

    回答 when 引导的从句,不一定指出具体的时间点.如回答句( 1 )可用 tomorrow, next month 等.而回答 what time 引导的问句,则必须说出具全的时间点,如 at two o'clock, at five past ten 等.

    2. 作连接副词,引导名词性从句或不定式,意为“什么时候”.从句使用陈述句语序,时态根据实际情况而定.

    如: ( 1 ) I'd like to know when they will come. 我想知道他们什么时候来.( when 引导宾语从句)

    ( 2 ) Can you tell me when the bank opens? 你能告诉我银行什么时候开门吗?( when 引导宾语从句)

    ( 3 ) When she'll be back depends much on the weather. 她何时回来在很大程度上取决于天气.( when 引导主语从句)

    ( 4 ) Have you decided when to go sightseeing? 你们已经决定什么时候去郊游了吗?( when 引导不定式结构)

    3. 作疑问代词,常和介词 since, till, up to 等连用,意为“什么时候”.

    如: ( 1 ) Since when have they had the house? 他们从什么时候起有这幢房子的?

    ( 2 ) Till when is the library open? 图书馆开放到几点呢?

    4. 作关系副词,引导限制性定语从句和非限制性定语从句.

    如: ( 1 ) The days are gone forever when the Chinese people were looked down upon. 中国人民被人轻视的日子一去不复返了.

    ( 2 ) The main school holidays are from mid-December till early February, when the days are long and warm. 学校的主要假期是从 12 月中旬到 2 月初,这段时间里白天长而且很温暖.

    ( 3 ) Considering (the time) when these paintings were done, they are in excellent condition. 考虑到这些油画的创作时期,它们保存的状况是极好的.

    ( 4 ) Do you remember (the time) when the three of us went on a picnic? 你还记得我们三个人去野餐的那段时光吗?

    在定语从句中, that 在某些条件下可用来代替 when ,这时其先行词通常是 time, day, moment, year 等.

    如: ( 1 ) His mother died on the evening that he was born. 他母亲死于他出生的那晚.

    ( 2 ) I stay at home on the days that I am not busy. 在我不忙的时候,我就呆在家里.

    在某些含有“时间”的名词词组后面,由于该名词不表示时间,或整个名词词组已用作连词,所以不用 when 引导.如: the moment, the instant, the minute, the second 等等,意为“一……就……”,引导时间状语从句.

    如: ( 1 ) The first time I went to China, I visited Beijing. 我第一次来中国就游览了北京.

    ( 2 ) I thought her nice and honest the first time I met her. 我第一次见到她时就认为她很诚实.

    ( 3 ) The instant I saw him I knew he was my brother. 我一看到他就知道他是我兄弟.

    二、作为从属连词,引导状语从句,表示多种语法意义:

    1. 表示时间,意为“当……时;在……的时候”.

    A. 在时间、条件等状语从句里,用一般现在时表示将来时;当需要表达将来完成的意义时,必须使用现在完成时来代替.

    如: ( 1 ) When you see him, please say hello to him. 见到他时,代我问他好.

    ( 2 ) When you have finished your experiment, please tidy the lab and put everything back in the cupboards. 当你们做完实验后,请把实验室整理好并把物品放回柜子中.

    B. 表示过去发生的事情,在 when 引导的时间状语从句的主从复合句中,动作发生在先的用过去完成时,在后的用过去时.

    如: ( 1 ) When I was in Japan, I bought some beautiful pearls. 我在日本时,买了一些漂亮的珍珠.

    ( 2 ) When I reached the station, the train had left. 当我到达火车站时,火车已经开走了.

    2. 表示前面的叙述所没有提到过的信息.它总是对所描述的事件予以引人注目的强调,意为“这时;突然”;当位于句末的分句具有引种用法时,大致有以下三种情况:

    A. when 分句前面的分句使用过去进行时.

    如: ( 1 ) He was still smiling when the door opened and his wife came in. 他正笑着的时候,门突然开了,他妻子走了进来.

    ( 2 ) I was thinking of this when I heard my name called. 我正想着这件事时,突然听到有人叫我的名字.

    B. when 分句前面的分句使用 was (were) about to, was (were) on the point 等.

    如: ( 1 ) We were about to start when it began to rain. 我们刚要出发就开始下雨了.

    ( 2 ) He was on the point of leaving when someone knocked at the door. 他刚要走就有人敲门.

    C. when 分句之前的分句用过去完成时,其中 sb had hardly / scarcely /barely … when 已成为固定词组.如:

    ( 1 ) We had hardly fallen asleep when the bell rang. 我们刚刚入睡,铃声就响了起来.

    ( 2 ) He had scarcely arrived when he had to leave again. 他刚刚到达就又要离开了.

    3. 表示条件,相当于 if ,引导条件状语从句.

    如: How can I get a job when I can't even read or write? 如果我连读和写都不会,我怎么能找到工作呢?

    4. 表示对比,主要有以下两种情况:

    A. 相当于 whereas, while, since, 意为“既然;然而”.

    如: ( 1 ) How can I help them to understand when they won't listen to me? 既然他们不愿听我的,我又怎么能帮助他们弄明白呢?

    ( 2 ) They have only three copies when we need five. 他们只有三本,而我们却需要五本.

    B. when 从句中使用虚拟语气,意为“本来……却……”.

    如: ( 1 ) She paid when she could have entered free. 本来可以免费入场,而她却付了款.

    ( 2 ) She stopped trying when she might have succeeded next time. 她本来下次有可能获得成功,但她却不再尝试了.

    ( 3 ) They were gossiping, when they should have been working. 他们本该工作,却在那里说别人的闲话.

    5. 由 when 等引导的状语从句,如果主语与主句的主语一致或是 it ,谓语动词又含 be 动词时,主语和 be 动词常常被省略,就变成“ when + V-ing/ V-ed/ adj/ 介词词组”的结构.

    如: ( 1 ) When in Rome, do as Romans do. 入乡随俗.

    ( 2 ) When (we are ) young, we are full of hope. 年轻时,我们大家总是充满希望.

    ( 3 ) Don't reach sideways when standing on a ladder. 站在梯子上时,不要侧着身子去够东西

    是否可以解决您的问题?

    题2: 【新概念第二册lesson14:Ihadnearlyreachedthetown,whentheyoungmansuddenlysaid,veryslowly,"DoyouspeakEnglish?"中的when的用法…………多谢啦!】[英语科目]

    when 引导的时间状语从句

    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.

    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.

    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)

    as when while的辨析

    as when while都表示主、从句动作同时发生,三者差异如下:

    表示“一边.一边”的意思

    as 强调两个动作同时进行,并表示对比时

    用于发生时间较短时

    when

    1、还可以表示从句动词的动作在主几句动词的动作”之前 ”或”之后”发生.

    2、when=and then; at that moment (正在那个时候)

    while 1、用于时间较长时

    2、 强调两个动作同时进行,并表示对比时

    有时这三个连词可以互换,有时不可以.

    lIt was raining hard when (as) I got there.

    我到那里时,正在下大雨.( 动作同时发生,when可换为as,但不能换为while,因为get是点动词.)

    lWhen I had read the article,he called me.

    我看完这篇文章之后,她给我打了电话.( 从句动作发生在主句之前,注意时态表达,只能用when )

    lWhen I got to the cinema,the film had begun.

    (当)我到了电影院时,电影已经开演了.(从句的动作发生在主句之后,只能用when,并要注意时态)

    lHe was about to leave,when the telephone rang.

    他正要离开,忽然电话响了.( 此时不能放在句首.主句动词一般表达 “正在” “即将”.

    while,as不能代替

    lShe thought I was talking about her daughter,while,in fact,I was talking about my daughter.

    他以为我在谈她女儿,然而,实际上在谈论我女儿.(表转折,对比,when,as都不能代替它)

    lWhile the alien was buying a souvenir,the girl called the police.

    外星人买纪念品时,那女孩给警察打了电话.(表示主句,从句的动作同时发生,while后引导的状语从句的动词必须是延续动词不能是点动词,因为它表示较长时间)

    lMother was worried because little Alice was ill,especially as (when/ while) father was away.

    妈妈担心,因为小爱丽丝病了,特别是他父亲不在家的时候.(此时as ,when,while可通用)

    题3: when用法Iwaswatching(watch)TVwhenShenzhou6wassentupintospace.when引导的时间状语从句,从句是一般过去时,主句是过去进行时.(明白)Weheard(hear)himsinginginthenextroomwhenwepassed.Mothertold(tell)meno[英语科目]

    主句和从句的时态要对应的嘛

    第一句你说你明白

    第二句从句是一般过去时,要表示当时正好听到唱歌

    第三句从句也是一般过去时

    题4: 【when的搭配与用法】[数学科目]

    字典上有,如果没买字典的话可以买一本《牛津词典》或者《朗文词典》

    题5: when后的用法比如说当碰到困难时,是表达成whenmeetingproblems还是whenmeetproblems?这里的when后面应跟名词性词组还是?[英语科目]

    when meeting problems这种说法对.但是需要注意也不一定总对.

    when 始终是连词,后面应该接从句.但是如果从句中的主语与主句中的相一致,可以省略从句中的主语,从而变成连词加非谓语动词的形式.如:

    When he studied in that school,he fell in love with English.

    =>When studying in that schook,he fell in love with English.

    When ice is heated,it will turn into water.

    => When heated,ice will turn into water.

    但如果从句中的主语与主句中的主语不一致,就不可以变成连词加非谓语动词的形式.

    如: When Tom found Jack in the park,Jack was sleeping on a bench.

    如有问题,欢迎追问.对了,要注意连词后的非谓语动词的形式哦.从这几个例句中聪明的你肯定可以悟出来的.

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