到了。 (5) 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： Things are getting better and better as time goes on. 随着时间的推移，情况越来越好。 As it grew darker, it became colder. 天色越晚，天气越冷。 (6) 表示“每当…的时候”(暗示一种规律性)，一般要用 when： It’s cold when it snows. 下雪时天冷。 He smiles when you praise him. 你夸奖他时他总是笑笑。 (7) 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： I will go home when he comes back. 他回来时，我就回家去。 (8) when 可从句算是状语从句用作并列连词，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： We were about to start when it began to rain. 我们正要出发，这时天开始下雨了。 He likes coffee, while she likes tea. 他喜欢咖啡，而她却喜欢茶。 (9) as 后可直接跟一个名词，构成省略句，但 while, when 很少这样用： As [When] a boy, he lived in Japan. 他小时候在日本。 (10) 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 [While] reading, he fell asleep. 他看书时睡着了。 When [While] in trouble, ask her for help. 遇到麻烦的时候你就去找她帮忙。 以上就是这次的内容了，不知道大家都掌握了吗？以后遇见了能分清这三者的不同了吗？

也是一种方式状语从句，它通从句学习中，有一种从句常可和以下关联词来引导as(或so)...as, than, according as, in proportion as等。 1. He woke up as suddenly as he had fallen asleep. 他醒来得和入睡一样突然。(第一个as是副词) 2. I have never seen so much rain as fell that February. 我从未见过像那个二月那么多雨。(否定结构常用so…as, 也可用as... as) 3. Man developed earlier than people think. 人类的出现比人们所想的要早。 4. He moves more slowly than his sister does. 他行动起来比他妹妹慢。 5. The youth of today are better off than we used to be. 今天的年轻人比我们过去的境况要好。 6. You may go or stay, according as you decide. 是去是留由你自己决定。 7. You will be praised or blamed according as your work is good or bad. 你受表扬还是责备得看你的工作好坏决定。 8. Men are happy in proportion as they are virtuous. 人之幸福与德行成正比。 9. Some people are happy in proportion as they are noticed. 有些人越受到注意就越高兴。 10. This book is the most interesting of the three. 这本书是三本中最有趣的。 11. This road is the busiest street in our city. 这条路是我们城市最繁忙的街道。 12. Food is to men what oil is to machine. 食物之于人,犹如油之于机器。

学好状语从句的关键就是熟练掌握各类引导词的用法，而状语从句往往数量多，每类从句又拥有大量的引导词，既不容易记忆，又容易混淆，所以这次沪江小编就先为大家整理了条件状语从句的各类引导词，大家记得认真看哦！ 条件状语常用的引导词是if和unless，但除了这两个以外，条件状语从句也拥有一些其他的引导词，这些引导词出现频率较低，用法偏复杂，所以不如if和unless知名度那么高。 1. on condition(that)...在……条件下 eg.I can tell you the truth on condition that you promise to keep a secret.

关系代词that、which、who、whose、whom和关系副词when 、where、why引导. 今天，小编为大家带来一份练习题，一起来看看吧！   1.The place _______interested me most was the Children's Palace. A. Which B. where C. what D. in which 2.Do you know the man _______? A. whom I spoke B. to who spoke C. I spoke to D. that I spoke 3.This is the hotel _______last month. A. which they stayed B. at that they stayed C. where they stayed at D. where they stayed 4.Do you know the year ______the Chinese Communist Party was founded? A. which B. that C. when D. on which 5.That is the day ______I'll never forget. A. which B. on which C. in which D. when 6.The factory ______we'll visit next week is not far from here. A. where B. to which C. which D. in which 7.Great changes have taken place since then in the factory _______we are working. A. where B. that C. which D. there 8.This is one of the best films _______. A. that have been shown this year B. that have shown C. that has been shown this year D. that you talked 9.Can you lend me the book ______the other day? A. about which you talked B. which you talked C. about that you talked D. that you talked 10.The pen ______he is writing is mine. A. with which B. in which C. on which D. by which   参考答案及解析 1. A. which用作关系代词，在定语从句中作主语。 2．C. "和谁讲话”要说speak to sb. 本题全句应为Do you know the man whom I spoke to.。whom是关系代词，作介词to的宾语，可以省略。 3. D. where是关系副词，表示地点，在定语从句中作地点状语。 4. C. when是关系副词，表示时间，在定语从句中作时间状语。 5．A. which是关系代词，在从句中作forget的宾语。其他几个答案都不能作宾语。 6．C. 解析同第5题。 7. A. 解析见第3题。 8. A. 本句话的先行词应该是films,因此，关系代词that是负数概念，其谓语动词应用复述的被动语态have been shown。如果句中的one前面使用了定冠词the，则the one应该视为先行词。 9. A. “谈到某事物”应说talk about sth.。about是介词，其后要用which作宾语，不句中作定语，修饰主句中的某一名词或代词的从句，叫做定语从句。被定语从句所修饰的词叫先行词，位于从句之前。定语从句能用that。 10. A. with which是"介词+关系代词"结构,常用来引导定语从句.with有"用"的意思,介词之   以上就是定语从句专项练习题的内容了。希望能给大家带来相应的帮助，喜欢就赶快收藏起来吧~

放在主句之前，而引导结果从句时却不能： 正：So that he could buy a new car, he saved a lot of money. 他节省了一大笔钱，以便能买辆新车。(引导目的状语从句) 误：So that I could hardly stand, I was tired.(引导结果状语从句不能置于句首，可改为I was tired so that I could hardly stand. 我很累，几乎站不稳了。)   二、so…that和such…that有时不从句是九大状语从句中较为简单的一种，也通常是我们最先接触到的一种，主要由so/such...that等词来引导。结果状语从句引导结果状语句 so…that和such…that可以引导结果状语从句，但并不是说它们引导的从句就一定是结果状语。请看以下句子： I’m so happy that you could visit us. 我很高兴你能来看望我们。(其中的so用于加强语气，相当于very) It’s such a great pleasure that you are here. 你在这里是非常令人高兴的事。(其中的that引导的是主语从句，句首的it为形式主语) 以上就是结果状语从句的大解析了，大家都get到了没有啊？好是那句老话，细节决定成败，大家一定要多多注意一些细节的用法，做好辨析，千万不要因为小差错而白白丢分。

常被省略。 e.g. He knew (that) he should work hard. 2、  连词if 、whether，它们起连接作用，在从句中不作句子成分，作“是否”解，在口语中多用if。 e.g. Tom don’t know if/whether his grandpa liked the present. He asked me whether or not I was coming. 一般情况下，if 和whether可以互换，但以下3种情况只能用whether： ①在不定式前：Whether to go there or not hasn’t been decided. ②在介词后：It depends on(依靠) whether it is going to rain. ③与or not连用：They are talking about whether to go there or not. 3、  连接代词who, whom, whose, what, which，连接副词when, where, why, how，它们起连接作用，作句子成分，各有自己的意义。 e.g. The teacher asked the new students which class he was in. I wonder where he got so much money. 【注意】 1、由连接代、副词引导的宾语从句可以和“疑问词+不定式”结构转化。 e.g. I don’t know how I should do with the presents. è I don’t know how to do with the presents. 2、要注意区分判断由if、when引导的从句类型。 二、宾语从句的语序： 宾语从句的语序是陈述语序，即“连接词+主语+谓语+其它成分”。特别强调：它的主语和谓语的语序是陈述语序，而不是疑问句的倒装结构。 Can you tell me who(m) do we have to see?  ( ╳ ) Can you tell me who(m) we have to see?  ( √ ) The teacher asked the students what they were doing. (思考: what 在从句中的成分) 陈述句变为宾语从句时,要注意人称和时态的变化,语序不变。e.g. She said, “I will leave a message on the desk.”àShe said she would leave a message on the desk. 一般疑问句和特殊疑问句变为宾语从句时,也要注意人称和时态的变化,后面接陈述语序。e.g. “Where are the tickets?”I asked him. àI asked him where the tickets are. 看从句完了小编分享的语法解析，大家对宾语从句是不是有了更深层次的理解了呢？赶快收藏起来吧~

讲解一下名词性从句的时态和语序问题： 名词性从句的语序 　　名词性从句的词序与陈述句语序相同，尤其注意那些由连接代词who(m), whose, which, what 和连接副词when, where, why 等引导的名词性从句，不要受它们在特殊疑问句中用法的影响而误用疑问句词序。如： 　　Why was she crying? 她为什么在哭? 　　I don’t know why he was crying. 我不知道她为什么哭。 名词性从句的时态问题 　　1. 当主句的谓语动词是过去式时，宾语从句若不是一个客观事实或真理，其谓语动词也必须用某种过去时态。如： 　　She said that she didn't want to know. 她说她不想知道。 　　I asked her whether she would agree. 我问她是否会同意 　　2. when, if 这两个词既可引导名词性从句，也可引导状语从句。当它们引导名词性从句且表示将来意义时，要直接使用将来时态;但当它们引导状语从句且表示将来意义时，则必从句的语序问题和时态问题是学习名词性从句须用一般现在时表示将来意义。如： 　　I don’t know when he will come, but when he comes, I’ll call you. 我不知道他什么时候，但当他来的时候，我会打电话给你。 　　句中第一个when 引导的是宾语从句，故用将来时态表示将来意义;第二个when 引导的是时间状语从句，故用一般现在时表示将来意义。 看完了这篇小编为同学们收集、整理的名词性从句的语序和时态相关的语法知识，大家应该收获颇多，赶快收藏起来吧~

交了一个女朋友,他想给她留下深刻的印象。 析:先行词 a new girl friend 在非限制性定语从句中作宾语,不可用 who 代替 whom . 在限制性定语从句中,先行词指人时可用 that 代替 who/ whom ,但在非限制性定语从句中先行词指人时,不可用 that 代替 who/whom . 例:她有一个姐姐,她是教师。 误: She has a sister, that is a teacher. 正: She has a sister, who is teacher. (三)关系代词省略情况不同 关系代词在限制性定语从句中作宾语时可以省去,非限制性定语从句的所有关系词均不可省。 例 1. This is the book (which/that) he lost yesterday. 这就是他昨天丢的那本书。 析:先行词 the book 在限制性定语从句中作宾语,关系代词 which 或 that 可以省略。 例 2. The book, which he lost yesterday, has been found. 他昨天丢了这句中作用不同 限制性定语从句对被修饰的先行词有限定制约作用,使该词的含义更具体,更明确。限制性定语从句本书,但现在已找到了。 析:先行词 the book 在非限制性定语从句中作宾语,关系代词 which 不可省。

1. It just isn’t fair________I was working as a waiter last month，my friends were lying on the beach. A．whenever B．Though C．for D．while 【解析】本题句意为：这真不公平。上个月当我在做服务员的时候，我的朋友们正躺在沙滩上。表示“与此同时”用while，引导时间状语从句。【答案】　D 2. —I wonder how much you charge for your service. —The first two are free________the

留了很大部分的疑问词的本色，所以，它们引导的从句在意思上应该表达的是一个“问题”，如：“谁？什么？何时？何地？为何？怎么？”等。而wh-ever已经没从句与定语从句之区别?    that引导的同位语从句 that引导的定语从句 句法功能上    that只起连接从句的作用，无意义。 在从句有这层色彩，不再关心这样的“问题”，而是充满了让步的意味，多有“无论．．．”之意。如：      The police wanted to know who will benefit most from the old man’s death.警方想知道谁将从老人的去世中受益最多。      Whoever will benefit from the old man’s death will be questioned by the police.能从老人的去世之中受益的所有人都将受到警方的盘问。