when的用法总结1

when的用法总结1
when的用法总结1

1. 固定结构

a. Last night I was about to go to bed when the phone rang.

b. No sooner had I arrived home _____ it began to rain.

A. when

B. while

C. as

D. than

a. be about to do sth…when

b. be on the way to doing sth…when

c. be on the point of doing sth when

2. 连接两个过去动作,一个长动作,一个短动作。

②I was cooking in the kitchen when someone knocked at the door.

3. 用作从属连词,意为“既然,尽管”,表示让步。例如:

①Why use metal when you can use plastic既然能用塑料,为什么用金属

②They kept trying when they knew it was hopeless. 尽管他们知道那件事没有希望,可是他们还在不断地努力。

4. since when常引导非限制性定语从句,when意为which time。since when从句应用完成时态。

came here in 1949, since when I have been engaged in this work.

came back on Tuesday, since when we have been working in the repair shop.

1. On a rainy day I was driving north through Bermont

__________ I noticed a young

man holding up a sign reading “Boston”.????

A. which?

B. where

C. when?????????????????????

D. that?

2. Why do you want a new job

_____ you've got such a good one already

A. that

B. where

C. which

D. when

3. Why do some governments spend billions of dollars on space exploration _______ the people of these countries are still suffering from starvation and poverty

A. whether

B. though

C. unless

D. when

4. We are living in an age

_______ many things are done on computer.

A. which

B. that

C. where

D. when

5. The reporter said that the UFO ______ east to west when he saw it.

A. was travelling

B. travelled

C. had been travelling

D. was to travel

6. ______ got into the room

_________ the telephone rang.

A. He hardly had; then

B. Hardly had he; when

C. He had not; than

D. Not had he; when

7. ---- Can I join your club, Dad

---- You can when you _______ a bit older.

A. get

B.

will got

C. are getting

D. will have got

8. I shall never forget those days ________ I lived in the countryside with the farmers, ________ had a great effect on my life.

A. that; which

B. when; which

C. which; that

D. when; who

9. The film brought the hours back to me ______ I was taken good care of in that faraway village.

A. until

B. that

C. when

D. where

10. He was about to tell me the secret ______ someone patted him on the shoulder.

A. as

B. until

C. while

D. when

11. My brother left school in 2005 , and since then he

______in Beijing .

A. lives

B. lived

C. will live

D. has lived

12. a. Tom left Shanghai for London on May 5 , since ___I have never called him up.

A when

B then C. while D. that

12. b. Tom left Shanghai for London on May 5. Since ___I have never called him up.

A when

B then C. while D. that

13. Hardly had he reached the school gate ________ the bell rang.

A. while

B. when

C. as

D. as soon as

14. No sooner had I arrived home _____ it began to rain. A. when B. while C. as D. than

15. I was on the _ __of leaving when I looked out of his study window and found something funny.

A. point

B. time

C. permission

D. request

Key

1.CDDDA 6. BABCD 11. DA13B

英语比较级的用法总结

☆形容词的比较级☆ 当我们需要对事物作出比较时,需要用到比较级。 比较级的句子结构通常是: 什么 + 动词be (am , is , are ) + 形容词比较级 + than(比)+ 什么 ,如: I’m taller and heavier than you. (我比你更高和更重。) An elephant is bigger than a tiger.(一只大象比一只老虎更大。)形容词的比较级是在形容词的基础上变化而来的,它的变化规则是: ①一般的直接在词尾加er ,如 tall - taller , strong - stronger , ②以e结尾的,直接加r ,如 fine – finer , ③以辅音字母加y结尾的,先改y为i再加er,如funny - funnier ④双写最后的字母再加er,如big – bigger, thin – thinner , hot – hotter 除此之外,还有几个特殊的单词,它的比较级和最高级都是不规则的,如:many / much(原形)– more(比较级)– most(最高级) little / few(原形)– less (比较级)– least(最高级) good(原形)– better(比较级)– best(最高级) bad (原形)– worse(比较级)– worst(最高级) far (原形)– further– furthest 附加:形容词的最高级变化类似于比较级,只是把词尾的er改成est,如: tall (原形)- taller (比较级)- tallest (最高级) long(原形)- longer(比较级)- longest(最高级) big (原形)- bigger(比较级)- biggest(最高级) ☆注意☆比较的两者应该是互相对应的可比较的东西。

when的用法总结大全

when的用法总结大全 when的用法你知道多少,今天给大家带来when的用法,希望能够帮助到大家,下面就和大家分享,来欣赏一下吧。 when的用法总结大全 when的意思 adv. 什么时候,(用于时间的表达方式之后)在那时,其时,当时conj. 在…时,既然,如果 pron. 什么时候,那时 n. 时间,时候,日期,场合 when用法 when可以用作副词 when的基本意思是“什么时候”。可用作疑问副词,用来询问某事曾发生或将要发生的时间,引导特殊疑问句; 还可用作关系副词引导限制性定语从句、非限制性定语从句和表语从句,表示“是…时候的事”。 when可用作从属连词,引导状语从句,表示时间时作“当…时,在…的时候”解; 表示条件时作“如果,要是”解; 表示对比时作“既

然,考虑到”解。当when所引导的从句的主语和主句的主语一致时,常将其主语、系动词或助动词省去,只留实义动词或表语,或者改写为短语。 when所引导的时间状语从句用一般现在时代替将来时,用现在完成时代替将来完成时。 when用作副词的用法例句 When did that happen?那件事是什么时候发生的? They stood respectfully when he entered the room.当他走进房间时,他们都恭恭敬敬地站着。 Iron will melt when it is made very hot.当铁烧得很热时就会熔化的。 when可以用作连词 when可用作从属连词,引导状语从句,表示时间时作“当…时,在…的时候”解; 表示条件时作“如果,要是”解; 表示对比时作“既然,考虑到”解。当when所引导的从句的主语和主句的主语一致时,常将其主语、系动词或助动词省去,只留实义动词或表语,或者改写为短语。 when所引导的时间状语从句用一般现在时代替将来时,用现在完成时代替将来完成时。

各种中药材的性味与归经汇总

可用于保健食品的中草药名单如外感初起,或里热炽盛,或肝阳上亢,以及湿阻、食滞等引起的胸闷腹胀、便溏泄泻等症,都应忌用。如体质壮实之火,并无虚弱现象,则不必再进服人参、人参叶、人参果、三七、土茯苓、大蓟、女贞子、山茱萸、川牛补药,膝、川贝母、川芎、马鹿胎、马鹿茸、马鹿骨、丹参、五加皮、五味子、升妄用本品,如误用或多用,往往反而导致闭气,而出现胸闷腹胀等症。此外,一般认为服用人参时,不可同时服食萝卜、茶叶等食物。麻、天门冬、天麻、太子参、巴戟天、木香、木贼、牛蒡子、牛蒡根、车前 2.子、车前草、北沙参、平贝母、玄参、生地黄、生何首乌、白及、白术、白人参叶 【性味归经】苦、甘、寒。归肺、胃经。芍、白豆蔻、石决明、石斛(需提供可使用症明)、地骨皮、当归、竹茹、【功能主治】补气,益肺,祛暑,生津。用于气虚咳嗽,暑热烦躁,红花、红景天、西洋参、吴茱萸、怀牛膝、杜仲、杜仲叶、沙苑子、牡丹皮、津伤口渴,头目不清,四肢倦乏。芦荟、苍术、补骨脂、诃子、赤芍、远志、麦门冬、龟甲、佩兰、侧柏叶、【用法用量】制大黄、制何首乌、刺五加、刺玫果、泽兰、泽泻、玫瑰花、玫瑰茄、知母、 3~9克。 【用药宜忌】不宜与黎芦同用。罗布麻、苦丁茶、金荞麦、金樱子、青皮、厚朴、厚朴花、姜黄、枳壳、枳 【按实、柏子仁、珍珠、绞股蓝、胡芦巴、茜草、荜茇、韭菜子、首乌藤、香附、语】本品市场所售较为混乱,或以大叶三七的叶、或以竹节三七的叶应用。骨碎补、党参、桑白皮、桑枝、浙贝母、益母草、积雪草、淫羊藿、菟丝子、 3.人参果野菊花、银杏叶、黄芪、湖北贝母、番泻叶、蛤蚧、越橘、槐实、蒲黄、蒺【性味归经】味甘,性温。归脾、胃二经。藜、蜂胶、酸角、墨旱莲、熟大黄、熟地黄、鳖甲。 【功能主治】号强心补肾、生津止渴、补脾健胃、调经活血。主治神经2002卫法监发[]51保健食品禁用物品名单衰弱、失眠头昏、烦躁口渴、不思饮食。 【用法用量】内服:煎汤,15八角莲、八里麻、千金子、土青木香、山莨菪、川乌、广防己、马桑叶、~20克;或泡黄酒饮。 4.马钱子、六角莲、天仙子、巴豆、水银、长春花、甘遂、生天南星、生半夏、三七 【性味归经】甘、微苦,温。归肝、胃经。生白附子、生狼毒、白降丹、石蒜、关木通、农吉痢、夹竹桃、朱砂、米壳【功能主治】(罂粟壳)、红升丹、红豆杉、红茴香、红粉、羊角拗、羊踯躅、丽江山慈散瘀止血,消肿定痛。用于咯血,吐血,衄血,便血,崩漏,外伤出血,胸腹剌痛,跌扑肿痛。姑、京大戟、昆明山海棠、河豚、闹羊花、青娘虫、鱼藤、洋地黄、洋金花、【用法用量】多研末服,每次1、草乌、香加皮(杠柳皮)牵牛子、砒石(白砒、红砒、砒霜)、骆驼蓬、鬼~1.5克;亦可入煎剂,3~10克,外用适量,研末外掺或调敷。臼、莽草、铁棒槌、铃兰、雪上一枝蒿、黄花夹竹桃、斑蝥、硫磺、雄黄、 【用药宜忌】雷公藤、颠茄、藜芦、蟾酥。孕妇慎用。 可用于保健食品中草药的药性归经5.土茯苓 【性味归经】甘、淡,平。归肝、胃经。人参1. 【功能主治】甘、微苦,平。归脾、肺、心经。【性味归经】除湿,解毒,通利关节。用于湿热淋浊,带下,痈肿,瘰疬,疥癣,梅毒及汞中毒所致的肢体拘挛,筋骨疼痛。大补元气,复脉固脱,补脾益肺,生津,安神。用于体【功能主治】 【用法用量】内服,煎汤,15~虚欲脱,肢冷脉微,脾虚食少,肺虚喘咳,津伤口渴,内热消渴,久病虚羸,30克;外用研末调敷。 【用药宜忌】惊悸失眠,阳痿宫冷;心力衰竭,心原性休克。肝肾阴亏者慎用。服药期间忌饮茶。 6.大蓟,15~2.5【用量用法】克,用文火另煎,单独服(先饮汁,再食渣) 【性味归经】甘,凉。归肝经。克,煎50~25或将参汁加入其它药汁内饮服;如用于急救虚

when做并列连词的用法

when 和引导时间状语从句的从属连词when 是不同的。这主要表现在以下几个方面: 1. 位置:when 引导时间状语从句时,该从句可放在主句之前也可放在主句之后;而并列连词when 只能位于两个分句之间,而且前面常常有逗号。例如:Come when you please. 你高兴来就来吧。(when 为从属连词)When I saw him,he was writing to a friend of his. 我看见他时,他在给一个朋友写信。(when 为从属连词)I was taking a walk,when I came across him. 我正在散步,突然碰见了他。 2. 意义:when 作从属连词用时,它所引导的从句表示主句中谓语动词动作发生的时间,即作“当……时”解;而并列连词when 连接的两个分句中,第一个分句表示的是背景,第二个分句表示的是一种突然的、意想不到的情况或过早发生的事情。when 通常含“这时突然”之义。例如:I was thinking of this,when I heard my name called. 我正想着这件事,突然听到有人叫我的名字。I had just fallen asleep,when the boor-bell rang. 我刚入睡,门铃突然响了起来。这种意义在孤立的句子中可以理解到,在文章中更能体会得到。如在“ I was wandering through the street when I caught sight of a tailor's shop ”一句中,“在街头漫步”只是“看见有家缝纫店”的时间,其后作者怎样走进缝纫店,想要什么样的衣服,怎样受到伙计的奚落,又怎样受到老板的奉承等情景均与“漫步街头”没有直接的因果关系。 3. 时态:when 引导的时间状语从句中可以根据句意的需要用一般现在时.一般过去时、过去进行时、分别说明现在,过去,甚至将来的行为;并列连词when 后面的分句中通常用非延续性动词的一般过去时,其前表时间的分句中可用:( 1 过去进行时表示过去某时间正在进行的动作。 例如: I was cooking when I heard her knocking at the door. 我正在做饭,突然听到她敲门的声音。 He was thinking about the problem,when an apple fell to the ground. 他正在思考这个问题,突然有一只苹果掉到了地上。 (2 )was /were going to,was / were about to,was / were on the point of 表示过去某一时间将要发生的动作。 例如: I was just going when he came in. 我正要走,这时他就进来了。 We were about to start when it began to rain. 我们刚要动身天就开始下起雨来了。 He was on the point of leaving,when someone knocked at the door. 他刚要走就有人敲门。 (3 )过去完成时表示过早发生的事情。请看下述两种场合: (a )过去完成时和含否定意义的hardly,scarcely,nearly 连用,和just,little 连用,或者与否定词not 连用时,表示“刚……,就……”的意思。 例如: I had hardly opened the door when he hit me. 我刚一开门他就打了我一下。 I had nearly reached the town,when the young man suddenly said very slowly,“ Do you speak English ”我快要进城了,年轻人突然慢慢地说:“你会讲英语吗” I had been there little more than a week when I set to work in earnest. 我到那儿还不超过一个星期就开始认真干起活来。 I had not been reading for half an hour when I heard steps outside.

比较级的用法知识点总结

比较级的用法知识点总结 1.可以修饰比较级的词,much,a lot,far,…的多a little, a bit,…一点儿 even甚至,still仍然 例如,Lesson One is much easier than Lesson Two.第一课比第二课容易得多。 She drives still more carefully than her husband.她开车仍然比她丈夫还认真。 2.比较级常用的句型结构 (1)“甲+be+(倍数)+形容词比较级+than+乙”表示“甲比乙…”或“甲比乙…几倍” 例如,Tom is taller than Kate.汤姆比凯特高。 “甲+实意动词+(倍数)+副词比较级+than+乙”表示“甲比乙…”或“甲比乙…几倍” 例如,I got up earlier than my mother this morning.我今天早晨起床比我妈妈还早。 (2)“甲+be+形容词比较级+than+any other+单数名词(+介词短语)”表示“甲比同一范围的任何一个人/物都……”,含义是“甲最……”。 例如,The Yangtze River is longer than any other river in China. =The Yangtze River is longer than any of the other rivers in China.长江比中国的任何一条其他的河都长。

=The Yangtze River is longer than the other rivers in China.长江比中国的其他所有的河都长。 =The Yangtze River is the longest river in China.长江是中国最长的河流。 注意:The Yangtze River is longer than any river in Japan.长江比日本的任何一条河都长。 “甲+实意动词+副词比较级+than+anyother+单数名词(+介词短语)”表示“甲比同一范围的任何一个人/物都……”,含义是“甲最……”。 例如,Mike gets to school earlier than any other student in his class. = Mike gets to school earlier than any of the other students in his class.迈克比他们班上任何一个其他的同学到校都早。 = Mike gets to school earlier than the other students in his class.迈克比他们班上其他的同学到校都早。 = Mike gets to school earliest in his class.迈克在他们班 到校最早。 注意:Mike gets to school earlier than any student in Tom’s class.迈克比汤姆班上任何一个学生到校都早。(迈克和汤姆不是同一个班) (3)“甲+be+the+形容词比较级+of the two+……”表示“甲是两者中较……的”。

when-的用法

when 的用法 一、when 用作副词。 1. 用作疑问副词,引导特殊疑问句。(什么时候,何时 [at what time ])例如: ①When will you come to see me? ②When are they going to visit the Great Wall? 2. 用作连接副词,通常用来引导名词性从句[主语从句、表语从句、同位语从句、宾语从句]及起名词作用的“when +动词不定式”结构。(什么时候,何时 [at which; on which ])例如: ①When he comes is not known. [主语从句] ②The morning is when I am busiest. [表语从句] ④I don't know when the plane takes off. [宾语从句] ⑤I don't know when to leave for London. [宾语] 3. 用作关系副词,引导限定性定语从句和非限定性定语从句。(在…的时候 [at/on/in/during which])例如: ①Do you still remember the days when we stayed in America? ②The day will come soon when the Chinese astronauts will go to the moon. ③It happened ten years ago, when I was a child. ④We will go to the countryside at the beginning of June, when the summer harvest will start. 二 . when 用作连词。 1. 用作从属连词,意为“当……的时候[at the time when ]”,引导时间状语从句。例如: ①They learned a lot from the peasants when they stayed in the village. ②It was snowing when he arrived at the station. 【点津】如果 when 引导的从句中的主语和主句中的主语一致,且从句中的谓语动词是“be +分词”或从句主语是 it ,则 be 动词及其主语常可省略。例如: ③When( he was )asked why he was late, he made no answer. ④I'll tell him about it when( it is )possible. 2. 用作从属连词,意为“一……就……”,引导时间状语从句。[immediately after]例如: ①We will stand up when the teacher comes into the classroom. 老师一进教室我们就起立。 ②Fire the rockets when I give the signal. 3. 用作从属连词,意为“还没 / 刚刚/刚一……就”,引导时间状语从句。[immediately after]例如: ①I had hardly opened the door when he came in. 我刚一开门,他就进来了。 ②I had not been reading for half an hour when I heard someone call my name. 【点津】hardly…when和no sooner…than的结构要注意三点:意思为“一A就B“;A句通常用完成时态;hardly 和 no sooner 位于句首时要注意部分倒装。 4. 用作从属连词,意为“倘若,如果”,表示条件。例如: ①Turn off the switch when anything goes wrong with the machine. 如果机器发生故障,就把电源关上。 ②He will be likely to recover when he is operated on. 5. 用作从属连词,意为“既然,尽管”,表示让步。例如: ①Why use metal when you can use plastic?既然能用塑料,为什么用金属? ②They kept trying when they knew it was hopeless. 尽管他们知道那件事没有希望,可是他们还在不断地努力。6. 用作并列连词,意为“在那时,届时;就在这时”,表示时间。这时主句中可以用过去进行时,过去完成时或“ was/were about to do sth. ”结构。 ①Last night I was about to go to bed when the phone rang. ②I was cooking in the kitchen when someone knocked at the door. ③He had just finished the book when supper was served. 7. 用作并列连词,意为“虽然、然而、可是”,表示转折。例如: ①He usually walks to work when he might take a bus. 虽然他可 以坐公共汽车上班,但他却常常步行上班。 ②I had only twenty dollars when I needed thirty to buy the dictionary.我需要 30 美元买那本字典,可是我只有20美元。 8. 用作并列连词,意为“而、却”,表示对比。例如: How can he say that everything is fine when it's obvious that it is not? 他怎能说一切都好呢?情况显然不是那样。 三 . when 用作代词[which time]。 when 作为代词常常位于介词之后,意为“那时,什么时候”。例如: ①Since when have you been studying Japanese? 【点津】since when 作引导词时是“介词(since)+关系代词(when)”的结构,when意为which time。since when常引导非限制性定语从句,从句应用完成时态。 ②I came here in 1949, since when I have been engaged in this work. 我1949年到这里,从那时起我就担任这项工作。 ③We came back on Tuesday, since when we have been working in the repair shop. ④We came a week ago, since when the weather has been bad. 四、when 还可用作名词,前面常常用定冠词 the。 the when 表示事 件发生的时间,常常与 the where, the how 并列使用。 He told the police the when and the how of the accident. 他告 诉警察事故发生的时间及发生的原委。 [巩固练习] 1. I remember ______ this used to be a quiet village. A. when B. how C. where D. what 2. Why do you want a new job _____ you've got such a good one already? A. that B. where C. which D. when 3. It was an exciting moment for these football fans this year, ______ for the first time in years their team won the World Cup. A. that B. while C. which D. when 4. We are living in an age _______ many things are done on computer. A. which B. that C. where D. when 5. The reporter said that the UFO ______ east to west when he saw it. A. was travelling B. travelled C. had been travelling D. was to travel 6. ______ got into the room _________ the telephone rang. A. He hardly had; then B. Hardly had he; when C. He had not; than D. Not had he; when 7. ---- Can I join your club, Dad? ---- You can when you _______ a bit older. A. get B. will got C. are getting D. will have got 8. I shall never forget those days ________ I lived in the countryside with the farmers, ________ had a great effect on my life. A. that; which B. when; which C. which; that D. when; who 9. The film brought the hours back to me ______ I was taken good care of in that faraway village. A. until B. that C. when D. where 10. He was about to tell me the secret ______ someone patted him on the shoulder.

学法用法工作总结

学法用法工作总结 学法用法工作总结(一) 加强依法治校,全面提高师生法制意识和学法用法自觉性是学校一项重要战略任务。近年来,我校坚持组织领导、建章立制、课内与课外、校内与校外相结合,将普法依法治理工作纳入学校重要议事日程,普法经费足额到位;结合实际,有针对性地开展学法用法活动,保证和促进了学校法制教育走上规范的管理和依法运行的轨道。 一、加强领导,形成依法治校的工作机制 组织建设是开展依法治校工作的根本保证。学校成立依法治校领导小组,由校长、党支部书记任组长,德育副校长、法制副校长任副组长,政教处、教务处、总务处、保卫科、团委负责人为成员,学校与交警队、消防队、派出所等单位建立了共建关系,保卫科负责具体抓落实工作,把依法治校工作摆上重要议事日程,做到依法治校工作与学校各项工作同计划、同实施,并把目标任务分解到各个处,确保依法治校工作齐抓、共管,各司其职、各负其责,层层抓落实的工作格局。 二、建章立制,确保依法治校的顺利实施 建章立制是落实依法治校的具体措施,依照宪法、法律、法规和规章结合学校实际情况,我校制定了一系列规章制度,如各处室管理制度、教职员工考核奖惩制度、德育规章制度等,保证学校各部门、各岗位工作有序高效运作,使学校法制管理走上了规范化、制度化轨

道。此外,学校通过板报、标语、横幅、集会、校园网、家校短信平台等形式,向全体师生和广大家长广泛宣传,在校报《校园之声》和校园广播《青春之音》上开辟专栏,进行宣传。通过广泛宣传,使“法律进校园”活动深入人心,增强了师生学法、守法的积极性和自觉性。 三、推进依法治教,构建法制校园。 我们开展“法律进校园”活动作为把依法治教、依法治校的前提,不断加大工作力度,积极实施,稳步推进。一是建立完善学校学法用法工作制度;二是加强学校领导、教职工的普法学法工作,号召全体教师自觉学法律、讲权利、讲义务、讲责任,进一步增强法制观念和法律素质。组织广大教师深入学习《宪法》、《教育法》、《教师法》、《刑法》、《治安管理处罚法》、《道路交通安全法》、《食品卫生法》等,在学法、用法和守法、护法中发挥表率作用。三是进一步建立健全符合法律法规、工作条例的学校管理制度,形成具有法治理念的校园秩序和文化氛围,使学校成为学生参与法治实践,培养法制观念,提高法制素质的重要场所。学校将管理制度汇编成册,装订成书,教师人手一册,加强了制度管理的透明度和执行的自觉性。 四、加强法制教育,普及法律知识。 1、立足课堂,充分发挥青少年法制教育主渠道作用。

(完整版)英语比较级的用法

英语比较级的用法 一忌使用双重比较级 即构成比较级时不能既加词尾-er,又在其前加more。如: 他的英语比我的英语好多了。 误:His English is more better than mine. 正:His English is much better than mine. 【注】虽不能说more better, most earliest 之类的,但可用“比较级+and+比较级”这样的形式: It’s getting warmer and warmer. 天气变得越来越暖和。 I’m getting fatter and fatter. 我越来越胖了。 We’re going more and more slowly. 我们越走越慢了。 要想加强比较级的语气,可用much, far, even, still, rather等修饰。如: This is very much cheaper. 这个便宜得多。 This one is even more expensive. 这个更贵些。 The patient is much better now. 病人现在好多了。 二忌比较对象不一致 如果有人问你“一公斤苹果多还是一尺布多”时,你会怎么回答?你肯定认为无法回答。对,无法回答,因为它们“单位”不一样,或者说它们不是同一类型的两个比较对象。在使用英语的比较级时,也要特别注意不要“比”错了对象。如: Her French was no better than mine. 她的法语比我好不了多少。 My dictionary is more useful than yours. 我的词典对你的词典更有用。 All your neighbours are noisier than ours. 你们的所有邻居都比我们的吵闹。

并列连词when相关的句式归纳

并列连词when相关的句式归纳 2006年普通高等学校招生全国统一考试(辽宁卷)中有这样一道单项填空题:He was about halfway through his meal ___ a familiar voice came to his ears. A.why B.where C.when D.while 解析:答案是C。此处when作并列连词,表示“就在此刻(and just then)”“,突然(and suddenly)”,该句译为:“饭刚吃到一半儿的时候,熟悉的声音传到了他的耳朵里。” 这里when引导的并不是我们所认为的时间状语从句而是并列句。when的意思是这时而不是当什么时候。在这个句型中when所引导的从句恰恰是句意的重心,when在这里起到一个修辞的作用表示后一动作的发生的出乎意料,而前面一句是为后一句谓语动词的发生提供背景。when 为并列连词。在我们的教材中并不鲜见。如: I'd just about given myself up for lost when I was spotted by a ship. 我正感到绝望时,一艘船发现了我。【Unit 3 Book 3】 33. She had just finished her homework ___ her mother asked her to plactised playing the piano yesterday.【09福建卷】 A. when B. while C. after D. since 7. Tom was about to close the window ___ the attention was caught by a bird. 【10全国卷】 A. when B. if C. and D. till 1.be (just) about to do... when... She was just about to say something more when she noticed the sullen look on his face.她刚要再说些什么,却突然看到了他阴沉的脸色。 We were about to telephone you when your telegram arrived. 2.be (just) on the point of doing sth ... when... They were on the point of giving up when the captain encouraged them fiercely to save the ship. 就在他们快要放弃努力时, 船长鼓励他们竭尽全力挽救轮船。

连词when的用法

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”。 (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。 (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。 (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? A. 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,

红景天的用法总结

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