but, however, while, although和though用法小结
【观察】阅读下列句子，注意各句中黑体单词的用法。
1. We have made some achievements, but we should be modest.
2. He promised to help me. However, he is busy and hasn’t come.
3. She felt ill. She went to work, however, and tried to concentrate.
4. He said that it was so; he was mistaken, however.
5. You like sports, while I’d rather read.
6. While I understand what you say, I can’t agree with you.
7. Although / Though it was late, she went on working.
8. Tired though he was, he went on working.
9. Although he’s got a good job now, he still complains.
10. She promised to phone. I heard nothing, though.
【归纳总结】
★but与however均可表示转折，意为“但是，然而”，都可以引出表转折意义的句子（句1-句4），但二者用法也有区别：
1. 从语义上看，but所表示的是非常明显的对比，转折的意味较however要强。
2. 从语法上看，but是个并列连词，而however却是个连接副词（句2-句4）。
3. 从语序上看，but总是位于它所引出的分句之首，而however可位于句首、句中或句尾。
4. 从标点上说，but之后一般不使用逗号，但however则通常用逗号与句子其他部分分开。
★连词while的用法
1. 引导表对比关系的并列句，意为“而，然而”（句5）。
2. 引导让步状语从句，意为“虽然，尽管”，多放在句首（句6）。
★although与though的用法
1. although与though用作连词时，意为“虽然，尽管”，引导让步状语从句（句7）。although在大多数情况下可与though通用。但在正式文体中，though可用于一种不以其为首的让步状语从句，这种从句须以形容词等开头，整个从句须置于主句之前（句8），这时although不能替换though。
2. although / though引导从句时，主句不可再使用but, however等，但可出现副词still等（句9）。
3. though可用作副词，意为“可是，不过”，一般放在句末（句10），但although 一般不用作副词。
【即学即练】从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. I was glad to meet Jenny again, _____ I didn’t want to spend all day with
her. (2013新课标全国卷II)
A. but
B. and
C. so
D. or
2. There’s no way of knowing why one man makes an important discovery _____ another man, also intelligent, fails. (2013新课标全国卷I)
A. since
B. if
C. as
D. while
3. _____ small, the company has about 1,000 buyers in over 30 countries. (天津2013)
A. As
B. If
C. Although
D. Once
4. Queen Elizabeth Ⅱ is often thought to be the richest woman in the world. _____, her personal wealth seems rather small. (安徽2012)
A. Besides
B. Otherwise
C. However
D. Altogether
5. _____ I always felt I would pass the exam, I never thought I would get an A. (湖南2012)
A. While
B. Once
C. If
D. Until
答案
【即学即练】1-5 ADCCA
甘肃王曰福 but 一词既可作连词、介词、副词用，又有一些习惯搭配和固定用法，现对其用法作以下归纳。 一、用作连词 1. 用作等立连词，使其前后的词、短语、分句相互对照，作“但是，然而，可是”解。例如： She is young but very experienced. 她虽然年轻但经验丰富。 2. 用于表示歉意的话语之后，表示谢绝或不赞成。例如： I'm sorry, but I disagree with you. 对不起，我不同意你的意见。 3. 用于两个并列的分句之间，与前面的否定词形成对比，作“无……而不……”解。例如： It never rains but it pours. 不雨则已，一雨倾盆。 I never go past that house but I think of my miserable life in the old society. 我走过那所房子时，没有一次不想起我在旧社会所过的悲惨生活。 二、用作介词 1. 与 no ， nobody ， nothing ， none ， who 等词连用，作“除……之外”解，用来排除同类中的一分子，或从整体中除去一部分。例如： Nobody knew her but me. 除我以外，没有人认识她。 Nothing but disaster would come from such a plan. 这个计划只能带来灾难，别无益处。 2. but 前面有 do 的某种形式时， but 后面的动词不定式要省略 to ；其前没有 do 的某种形式时， but 后面的不定式要带 to 。例如： We had no choice but to wait. 除了等待，我们别无选择。 He did nothing all day long but watch TV. 一整天，他除了看电视，别无他事可做。
when 和while的用法区别 两者的区别如下： ①when是at or during the time that, 既指时间点，也可指一段时间； while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。 ②when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。 ③由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如： a. When the teacher came in, we were talking. 当此句改变主从句的位置时，则为： While we were talking, the teacher came in. b. They were singing while we were dancing. ④when和while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如： a. The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。 b. He is strong while his brother is weak. 他长得很结实，而他弟弟却很瘦弱。 一。引导时间状语从句时，WHILE连接的是时间段，而WHEN连接的多是时间点 例如What does your father do while your mother is cooking? What does your mother do when you come back? 二，WHILE可以连接两个并列的句子，而WHEN不可以 例如I was trying my best to finish my work while my sister was whtching TV 三，WHEN是特殊疑问词，对时间进行提问，WHILE不是。 例如，When were you bron? 续性动词和短暂性动词 英语中的动词，是学习中的重点，又是难点。英语中的动词有多种分类法。根据其有无含义，动词可分为实义动词和助动词；根据动词所表示的是动作还是状态，可以分为行为动词和状态动词；根据动词所表示的动作能否延缓，分为延续性动词和终止性动词。 可以表示持续的行为或状态的动词，叫做“延续性动词”，也叫“持续性动词”，如：be, keep, have, like, study, live, etc. 有的表示短暂、瞬间性的动词，叫做“终止性动词”，也可叫“短暂性动词”，或“瞬间性动词”，如die, join, leave, become, return, reach, etc.
As, though, although的用法 1. 用作连词，表示让步(意为：虽然，尽管)，要用于倒装句，且倒装后位于句首的名词通常不用冠词(等于though, 但语气 稍弱)。如： Child as [though] he was, he did quite well. 他虽是个孩子，但已干得很不错。 2. 用作关系代词，主要用法有二。如： (1) 用在such, same, as等之后，引导限制性定语从句。如： This is the same watch as I lost. 这块表跟我丢失的那块一样。 Such men as heard of him praised him. 听说过他的人都赞扬他。 (2) 单独用作关系代词，引导非限制性定语从句，可放在主句之前(常译为：正如)或之后(常译为：这一点)，且主从句之间一般要用逗号隔开。如： He was absent, as is often the case. 他缺席了，这是常有的事。 As was expected, he succeeded at last. 正如我们所料，他终于成功了。 3. 用来表示目的，下面两种句子结构都可以。如： 仔细写以便把每句话都写清楚。 正：Write carefully so as to make every sentence clear.
4. 在正式文体(尤其是文学体裁)中，as后可用倒装语序表示“…也一样”这类意思(现代英语通常so表示这一用法)。如：He travelled a great deal, as did most of his friends. 他去过许多地方旅游，他的多数朋友也是一样。 注：用作连词，表示原因(参见because)，表示时间(参见when)。 5. 用于as if as though, 意为“仿佛”、“似乎”。两者一般可通用(但注意不能说as although)。用法上注意几点： (1) as if [though] 可引导状语从句和表语从句，从句谓语根据语义的要求，可用陈述语气(若可能为事实)或虚拟语气(若为假设或不太可能是事实)。如： It looks as if it is going to rain. 天似乎要下雨了。 He talks as though he knew everything. 他夸夸其谈，好像无所不知。 When a pencil is partly in a glass of water, it looks as if it were broken. 当把一支铅笔的一部分放在一杯水里时，它看起来好像折断了似的。 当主句谓语是过去时态时，从句谓语常可用陈述语气。如：He paused as though he found a difficulty. 他停了下来，似乎遇到了一个难题。 She felt as if she lost something. 他觉得似乎丢了什么东西。
when和while用法区别专项练习 讲解三例句： 1. The girls are dancing while the boys are singing. 2. Kangkang’s mother is cooking when he gets home. 3. When/While Kangkang’s mother is cooking, he gets home. 一、用when或者while填空 Margo was talking on the phone, her sister walked in. we visited the school, the children were playing games. · Sarah was at the barber’s, I was going to class. I saw Carlos, he was wearing a green shirt. Allen was cleaning his room, the phone rang. Rita bought her new dog; it was wearing a little coat. 7. He was driving along ________ suddenly a woman appeared. 8. _____ Jake was waiting at the door, an old woman called to him. 9. He was reading a book ______suddenly the telephone rang. 10. ______ it began to rain, they were playing chess. [ 二、用所给动词适当形式填空 11. While Jake __________ (look) for customers, he _______ (see) a woman. 12. They __________ (play) football on the playground when it _____ (begin) to rain. 13. A strange box ________ (arrive) while we _________ (talk). 14. John ____________ (sleep) when someone __________ (steal) his car. 15. Father still (sleep) when I (get) up yesterday morning. 16. Grandma (cook) breakfast while I (wash) my face this morning. 17. Mother (sweep) the floor when I (leave) home. ~ 18. I (read) a history book when someone (knock ) at the door. 19. Mary and Alice are busy (do) their homework. 20. The teacher asked us (keep) the windows closed. 21. I followed it (see) where it was going. 22. The students (play) basketball on the playground from 3 to 4 yesterday afternoon. / 三、完成下面句子，词数不限 1.飞机在伦敦起飞时正在下雨。 It when the plane in London. 2.你记得汶川大地震时你在做什么吗 Do you remember what you when Wenchuan Earthquake . 3.当铃声想起的时候，我们正在操场上玩得很开心。 We on the playground when the bell . 4.当妈妈下班回家时，你在做什么 % when Mum from work 5.当我在做作业时，有人敲门。 I was doing my homework, someone
But 用法小结 but一词在英语教材中复现率极高，用法也颇为复杂，现总结如下： 一、conj. “但是”，“可是”，“而且” English may be hard,but it is the most important of all. 英语虽然很难，但却是最重要的。 注意：but 不能与although或though 连用,因为它们是连词,故不能同时出现在句子中，如： 虽然他是个孩子，但是却懂得很多。 Although he is only a child,but he knows a lot. (×) Although he is only a child,he knows a lot.(√) He is only a child,but he knows a lot.(√) 二、adv. (=only) “仅仅” “只是” I can’t tell you but one thing—my age. 我只有一件事不能告诉你，即我的年龄。 You have but choices—follow me or refuse me. 你只有两个选择，要么听我的，要么拒绝我。 三、prep.“除了”（多和不定代词连用） 1、接人称代词 They are all wrong but her/she.除了她以外，他们都错了。 * 用she时，but为连词。 2、接介词短语 You can put it anywhere but on the floor. 你就是不能把它放在地上。 You can find that kind of thing nowhere but in England. 这种东西只能在英国找到。 3、接形容词 Shelooks anything but well.(She looks ill.) 她看来是病了。 The park is all/anything but beautiful.这公园一点也不美。 4、接数词 I know them all but two. 他们当中我只有两个不认识的。 He lives in the next house but one.他住在隔壁的隔壁。 She lives in last house in the street but two.她住在这条街的倒数第三家。 * next but one/two 隔一/两个；第三/第四 Last but one/two 倒数第二/第三 5、接不定式 He wanted nothing but to stay here for another day.他只是想在这再呆一天。 I have no choice but to tell you the truth. 我只有告诉你实话。 There was nothing to do but (to) wait till help came. 只有等待救援了。 * 如果谓语动词为实意动词do的某种形式时，but 后的不定式要省略符号to. 如： I can do nothing but let him know. 我只能通知她。 They did nothing but complain. 他们只是抱怨。 6、接从句 Nothing would contend him but (that) I must come. 必须我来了他才能满意。
when和while的用法解析、练习题及答案（附总结表格） 一、讲解三例句: 1. The girls are dancing while the boys are singing. 2. Lucy’s mother is cooking when she gets home. 3. When/While Lucy’s mother is cooking, she gets home. 二、用when或者while填空 1.______ Margo was talking on the phone, her sister walked in. 2.______ we visited the school, the children were playing games. 3.______ Sarah was at the barber’s, I was going to class. 4.______ I saw Carlos, he was wearing a green shirt. 5.______ Allen was cleaning his room, the phone rang. 6.______ Rita bought her new dog; it was wearing a little coat. 7. He was driving along ________ suddenly a woman appeared. 8. _____ Jake was waiting at the door, an old woman called to him. 9. ______ it began to rain, they were playing chess. 10. She saw a taxi coming ______ the woman was waiting under the streetlight. 三、语法 while和when都是表示同时，到底句子中是用when还是while主要看主句和 从句中所使用 的动词是短暂性动作(瞬时动词)还是持续性动作。 1、若主句表示一个短暂性动作，而从句表示的是一个持续性动作时，用 When/While。如: He fell asleep when while he was reading. 他看书时睡着了。
although与though的区别和用法 一、用作连词 表示虽然”两者大致同义，可换用，只是although比though更为正式： Though [Although] it was raining ，we went there.虽然下着雨，但我们还是去了那儿。 Though [Although] it was barely four o ' clock, the lights were 尽管才四点.钟，灯 已经亮了。 Though [Although] we are poor, we are still happy. 我们虽然穷，仍然很快活。 二、用作副词 although 一般不用作副词，而though可用作副词，且一般放在句末（不放在句首），意 为可是”、不过” It ' s hard work; I enjoy it though X作很辛苦，可是我乐意干。 He is look ing fit, though. 但他看起来很健康。 You can count on him, though. 不过你可以指靠他。 三、用于习语 在as though（好像，仿佛），even though（即使，纵然）等固定短语中不能用although : She closed her eyes as though she were tired.她闭上眼，仿佛很疲劳似的。 We felt as though we had wit nessed the whole thi ng. 我们感到仿佛目击了整个这件事似 的。 He is an honest man, I must say, even though I have opposed him. 尽管我反对过他，我还得说他是一个诚实的人。 She was always afraid of men, eve n though she had lots of boyfrie nds. 尽管她有很多男朋 友，她总是害怕男人。 四、用于倒装 though引导的让步状语从句可用部分倒装的形式（注意：倒装后位于句首的名词之前不 用冠词），但although 一般不这样用： Poor though I am, I can afford it.我虽穷，但这东西还是买得起的。 Child though he was, he did quite well.他虽是孩子，但干得很好。 五、though 放在句尾相当于however, nevertheless
WHEN与WHILE用法区别 when, while这三个词都有"当……时候"之意，但用法有所不同，使用时要特别注意。 ①when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。如： When I got home, he was having supper.我到家时，他正在吃饭。 When I was young, I liked dancing.我年轻时喜欢跳舞。 ②while只指"时间段"，不指"时间点"，从句的动词只限于持续性动词。如：While I slept, a thief broke in.在我睡觉时,盗贼闯了进来。 辨析 ①when从句与主句动作先后发生时，不能与while互换。如： When he has finished his work, he takes a short rest.每当他做完工作后，总要稍稍休息一下。(when = after) When I got to the cinema, the film had already begun.当我到电影院时，电影已经开始了。(when=before) ②when从句动词为终止性动词时，不能由while替换。如： When he came yesterday, we were playing basketball.昨天他来时，我们正在打篮球。 ③当从句的谓语是表动作的延续性动词时，when, while才有可能互相替代。如：While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时，老师进来了。 ④当从句的谓语动词是终止性动词，而且主句的谓语动词也是终止性动词 时,when可和as通用，而且用as比用when在时间上更为紧凑，有"正当这时"的含义。如： He came just as (or when) I reached the door.我刚到门那儿，他就来了。 ⑤从句的谓语动词如表示状态时，通常用while。如： We must strike while the iron is hot.我们应该趁热打铁。 ⑥while和when都可以用作并列连词。
区别 ① although和though同义，在一般情况下，可以互换使用。只是though较普遍，常用于非正式的口语或书面语中，而although 则较为正式。另外although语气比though重，常用以强调让步概念。 Though/Although my car is very old, I don't want to buy a new one.虽然我的汽车很旧，但我不想买一辆新的。 He insisted on doing it although I warned him not to.虽然我警告他不要做，但他仍然坚持要做。 ② even能和though组合表示强调，但even不能和although组合。因此，不能说even although,在这里even though=even if(no matter if; though即使……也……) Even if/Even though we could afford it, we wouldn't go abroad for our vocation.即使我们付得起这笔钱，也不出国度假。 ③当让步状语从句指某种假设情况时，通常用though,而不用although。 Though all the world were against me, I should still hold to my opinion.就算全世界都反对我，我还是坚持我的立场。 Though everybody deserts you, I will not.即使所有人都抛弃你，我也不会的。 ④ though可以独立用作副词，常放在句末，意为all the same (还是；仍然)或however(可是；然而)，而although无此用法。 She didn't tell me what she had done, but I know it though.她没有告诉我她所做的事情，但我还是知道了。 It's hard work. I enjoy it, though.工作很苦，可是我喜欢。 ⑤ though引导让步状语从句时可以倒装，而although从句则不能。 Bravely though they fought, they had no chance of winning.虽然他们打得很勇敢，但还是没有机会获胜。 相同点： ①在although和though 引导的让步状语从句中，主句里不可用but,若要强调前后两部分的对比意义，可在主句前加yet 或still。 Although/Though he has a lot of money, yet/still he is unhappy.他虽然有很多钱，但并不幸福。 ② although和though引导让步状语从句时，常采用省略形式。 Although tired (=Although he was tired), he kept on working.虽然很疲劳，但他继续工作。 The problem, though complicated(=though it is complicated), can be solved without much difficulty.这个问题虽然复杂，但解决起来不会有很大困难。 as, though, although引导的让步状语从句。 [注意]although位于句首;though位于句首或句中;as位于句中=though。它的词序是把句中强调的形容词、副词、动词或名词放在连词前。[参考倒装结构] 请注意下列句式的变化： [例句] 1. Although/Though I’m young, I already know what career I want to follow. →Young as/though I am, I already know what career I want to follow.我虽然年轻，但我已经明白我应该追随什么样的事业。 2. Although/Though I respect him very much, I cannot agree with his idea. →Much as/though I respect him, I cannot agree with his idea. 虽然我很尊重他，但是我不同意他的观点。 3. Although/Though he is a child, he knows a lot of Chinese characters. →Child(省略冠词)as/though he is, he knows a lot of Chinese characters. 他虽然还是个孩子，却认识了许多汉字。
as when while 的区别和用法 as when while的用法 一、as的意思是“正当……时候”,它既可表示一个具体的时间点，也可以表示一段时间。as可表示主句和从句的动作同时发生或同时持续，即“点点重合”“线线重合”；又可表示一个动作发生在另一个动作的持续过程中，即“点线重合”， 但不能表示两个动作一前一后发生。如果主句和从句的谓语动词都表示持续性的动作，二者均可用进行时，也可以一个用进行时，一个用一般时或者都用一般时。 1、As I got on the bus，he got off. 我上车，他下车。（点点重合）两个动作都是非延续性的 2、He was writing as I was reading. 我看书时，他在写字。（线线重合）两个动作都是延续性的 3、The students were talking as the teacher came in. 老师进来时，学生们正在讲话。（点线重合）前一个动作是延续性的，而后一个动作时非延续性的 二、while的意思是“在……同时（at the same time that )”“在……期间(for as long as, during the time that）”。从while的本身词义来看，它只能表示一段时间，不能表示具体的时间点。在时间上可以是“线线重合”或“点线重合”，但不能表示“点点重合”。例如： 1、He was watching TV while she was cooking. 她做饭时，他在看电视。（线线重合） 2、He was waiting for me while I was working. 我工作的时候，他正等着我。（线线重合） 3、He asked me a question while I was speaking. 我在讲话时，他问了我一个问题。（点线重合）
but 的用法 甘肃王曰福 but 一词既可作连词、介词、副词用，又有一些习惯搭配和固定用法，现对其用法作以下归纳。 一、用作连词 1. 用作等立连词，使其前后的词、短语、分句相互对照，作“但是，然而，可是”解。例如： She is young but very experienced. 她虽然年轻但经验丰富。 2. 用于表示歉意的话语之后，表示谢绝或不赞成。例如： I'm sorry, but I disagree with you. 对不起，我不同意你的意见。 3. 用于两个并列的分句之间，与前面的否定词形成对比，作“无……而不……”解。例如： It never rains but it pours. 不雨则已，一雨倾盆。 I never go past that house but I think of my miserable life in the old society. 我走过那所房子时，没有一次不想起我在旧社会所过的悲惨生活。 二、用作介词 1. 与 no ， nobody ， nothing ， none ， who 等词连用，作“除……之外”解，用来排除同类中的一分子，或从整体中除去一部分。例如： Nobody knew her but me. 除我以外，没有人认识她。 Nothing but disaster would come from such a plan. 这个计划只能带来灾难，别无益处。 2. but 前面有 do 的某种形式时， but 后面的动词不定式要省略 to ；其前没有 do 的某种形式时， but 后面的不定式要带 to 。例如： We had no choice but to wait. 除了等待，我们别无选择。 He did nothing all day long but watch TV.
过去进行时过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作，常和表过去的时间状语连用，如： 1. I was doing my homework at this time yesterday. 昨天的这个时候我正在做作业。 2. They were waiting for you yesterday. 他们昨天一直在等你。 3. He was cooking in the kitchen at 12 o'clock yesterday. 昨天12点，他正在厨房烧饭。 过去进行时的构成： 肯定形式：主语+was/were+V-ing 否定形式：主语+was not (wasn't)/were not (weren't)+V-ing 疑问形式：Was/Were+主语+V-ing。 基本用法： 1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有，at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…)，when sb. did sth.等时间状语从句，如： 1）What were you doing at 7p.m. yesterday? 昨天晚上七点你在干什么？ 2）I first met Mary three years ago. She was working at a radio shop at the time. 我第一次遇到玛丽是在三年前，当时她在一家无线电商店工作。 3）I was cooking when she knocked at the door. 她敲门时我正在做饭。 2. when后通常用表示暂短性动词，while后通常用表示持续性动词，而while所引导的状语从句中，谓语动词常用进行时态，如： When the car exploded I was walking past it. = While I was walking past the car it exploded. 3. when用作并列连词时，主句常用进行时态，从句则用一般过去时，表示主句动作发生的过程中，另一个意想不到的动作发生了。如： I was walking in the street when someone called me. 我正在街上走时突然有人喊我。 4. when作并列连词，表示“（这时）突然”之意时，第一个并列分句用过去进行时，when引导的并列分句用一般过去时。如：
二、用作介词 1. 与no ，nobody ，nothing ，none ，who 等词连用，作“除……之外” Nothing but disaster would come from such a plan. 这个计划只能带来灾难，别无益处。 2. We had no choice but to wait. 除了等待，我们别无选择。 He did nothing all day long but watch TV。。 三、用作副词 1. 意思上相当于only ，后面跟名词或动词。 We can but try now. 我们现在只有尝试一遍。 2. but 出现在too …to …结构前面时，表肯定 I'm but too glad to go there with you. 我非常高兴和你一起去那里。 四、含but 的习惯用语 1. but for ＝without ，意为“要不是；如果没有”，意思上相当于一个虚拟条件句。 But for the rain (If it hadn't rained), we would have had a pleasant journey. 要不是天下雨，我们这次旅行就惬意了。 But for your help, we couldn't have carried out the plan. 如果没有你的帮助，我们不可能实现那个计划。 2. but that = except that ，意为“若非；要不是”，引导虚拟条件状语从句。 He would have helped me but that he was short of money at that time. 要不是他那时候没钱，他会帮助我的。 3. but then = on the other hand ，“不过；在另一方面”。 London is a noisy place, but then it's also a place where you get the best entertainment. 伦敦是个闹市，不过它也是能够给你最好娱乐的地方。 4. nothing but = only ，意为“只；不过是”。 We could see nothing but water. 我们只能看见水。 6) anything but 绝不,远非 He is anything but an honest man. 他绝不是个诚实的人. 5. not …but …意为“不是……而是……”，连接两个并列的名词、形容词、副词、短语或分句 My bag is not black but red. 我的书包不是黑色的而是红色的。。 6. no …but意为“没有……不……”;虽然，尽管。 No child but likes Old Li in our village. 没有孩子不喜欢我们村里的老李。 I can’t marry her, no bu t we love each other very much. 我不能娶她，尽管我们彼此非常相爱 8. not that …but that …意为“不是因为…而是因为
◇“和”，连接两个名词，代词或两个形容词等语法作用相同的词语。但否定句中用or。但如果前后名词都用no修饰，则可以用and。 The air was so warm and bright. It has no feet or legs. It has no eyes and no ears. I have no sister or brother. ◇“然后”。用于连接两句有时间上先后的句子。 She washed the dishes and dried them. ◇表示目的，意图。用于go, come, stop, run, stay等动词后。 Come and have a drink. Go and buy one. ◇“只要……就会……”“如果……那么……”，用于祈使句后，表示条件与结果的关系。Knock on the door, and it will be opened. Come late again, and you’ll be fired. but ◇但是，可是，而，却。 He is in poor health, but he still kept working. ◇用在表示歉意的话后，引起一个分句，这个but通常不译成汉语。 Excuse me, but can you tell me how to get to the railway station? ◇不与although/though (“虽然，尽管”)连用。 Though he is old, he works hard. He is old, but he works hard. ◇作介词，表示“除了……之外”。 She did nothing but watch TV. or ◇“一般疑问句+ or+被选择的部分”构成选择疑问句。 Do you like apples or pears? Would you like tea or coffee? ◇“祈使句+or +陈述句”，表示“……，否则，……” Hurry up, or you will be late. Work hard, or you cannot pass this exam.
a l t h o u g h与t h o u g h 的区别和用法 Company Document number：WTUT-WT88Y-W8BBGB-BWYTT-19998
although与though的区别和用法 一、用作连词 表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式：Though [Although] it was raining，we went there. 虽然下着雨，但我们还是去了那儿。 Though [Although] it was barely four o’clock, the lights were already on. 尽管才四点钟，灯已经亮了。 Though [Although] we are poor, we are still happy. 我们虽然穷，仍然很快活。 二、用作副词 although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放在句首)，意为“可是”、“不过”： It’s hard work; I en joy it though. 工作很辛苦，可是我乐意干。 He is looking fit, though. 但他看起来很健康。 You can count on him, though. 不过你可以指靠他。 三、用于习语 在 as though(好像，仿佛)，even though(即使，纵然)等固定短语中不能用although： She closed her eyes as though she were tired. 她闭上眼，仿佛很疲劳似的。 We felt as though we had witnessed the whole thing. 我们感到仿佛目击了整个这件事似的。 He is an honest man, I must say, even though I have opposed him. 尽管我反对过他，我还得说他是一个诚实的人。 She was always afraid of men, even though she had lots of boyfriends.尽管她有很多男朋友，她总是害怕男人。 四、用于倒装
When while as的区别和用法 when的用法 当主句使用持续性动词时. Dave was eating,when the doorbell rang.门铃响时,大卫在吃饭. 2.一个动作紧接着另一个动作发生. When the lights went out, I lit some candles.灯灭了,我赶紧点上一些蜡烛. 3.谈论生命中的某一阶段,或过去的某段时间. His mother called him Robbie when he was a baby. 在他很小时,他妈妈叫他Robbin. 4.指"每一次" When I turn on the TV, smoke comes out the back. 每当我打开电视,就有烟从后面冒出. while/as 的用法 从句多为进行时,而且为持续性动词. I'll look after the children while you are making dinner. 你做饭,我来照顾孩子. 注意事项: (1) “主短从长”型：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： He fell asleep when [while, as] he was reading. 他看书时睡着了。 Jim hurt his arm while［when，as］he was playing tennis. 吉姆打网球时把手臂扭伤了。 As［When，While］she was waiting for the train，she became very impatient. 她在等火车时，变得很不耐烦。 (2) “主长从长”型：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： Don’t talk while you’re eating. 吃饭时不要说话。 I kept silent while he was writing. 在他写的时候，我默不做声。 但是，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：