英语三大类从句简析叫什么从句就看该从句充当什么成分主语从句就是在句中充当主语的从句what he did made me angry 他的所作所为让我恼火宾语从句就是在句中充当宾语的从句He said that he would not go to school tomorrow 他说他明天不去上学定语从句就是在句中充当宾语的从句The boy whom i talked to is my cousin 跟我说话的那个男孩儿是我表弟表语从句就是在句中充当表语的从句The house is not what it used to be 那所房子不是它原来的那个样子了状语从句就是在句中充当状语的从句有原因时间让步等状语从句原因状语从句She was late for school because she overslept 因为睡过头了所以她迟到了时间状语从句when I was 5 years old,my parents divorced 当我五岁的时候父母离异了让步状语从句Although I liked the watch very much,I donated it to the children in the rural region尽管我非常喜欢这只手表但是我还是把它捐给了山区的孩子同位语从句就是在句中充当同位语的从句同位语从句通常起解释说明作用通常由that引导that不做成分没有词义最常见的同位语从句：Word came that the US president Barrack Obama was going to visit China.消息传来美国总统奥巴马将访问中国that the US president Barrack Obama was going to visit China 就是word 的同位语从句从句讲述的就是news的内容所以同位语从句起解释说明作用第一大类：定语从句定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。
定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
关系代词有：who, whom, whose, that, which等。
关系副词有：when, where, why等。
分析句子中得定语从句。
1.Don't forget the things that once you owned. Treasure the things that you can't get.Don't give up the things that belongs to you and keep those lost things in memory.曾经拥有的，不要忘记。
不能得到的，更要珍惜。
属于自己的，不要放弃;已经失去的，留作记忆。
2.I must find an ideal job after graduating from college, one that can provide me with both interest and money.第二大类：名词性从句在句子中起名词作用的句子叫名词性从句(Noun Clauses）。
名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
找出下列短文中的名词性从句There was an accident on the corner of the Roman Street this morning. No witness saw what on earth happened then. A car crashed into a truck but luckily, no one got injured. Who will be responsible for the accident is still on investigation. The police is uncertain about the cause that led to the accident. The truck driver looked asif he was guilty. He was too nervous to say a word. What the police would do is to figure out the truth. They said it was difficult for them to judge who exactly should be to blame .How this happened was still not clear. It was certain that the car driver was too tired to stop the car immediately. The car driver didn’t admit the fact that he was over-speed driving at the turning. The police doubted whether what he said was true and decided to make a further investigation.第三大类状语从句状语从句(Adverbial Clause) 状语从句指句子用作状语时，起副词作用的句子。
它可以修饰谓语、非谓语动词、定语、状语或整个句子。
根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。
状语从句一般由连词(从属连词)引导，也可以由词组引起。
从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。
状语从句是在句子中做状语的从句，由从属连词引导，主要分为八大项：1、时间状语从句、2、地点状语从句、3、目的状语从句、4、结果状语从句、5、原因状语从句、6、条件状语从句、7、让步状语从句、8、比较状语从句。
1、时间状语从句，引导词＂when、while、as、until(till)、not until、since、ever since、each time、whenever、once、the moment、as soon as、no sooner...than、scarcely/hardly...before/when＂eg:When I reached the booking office, all the tickets had been sold.While there is life there is hope.Bill sang as he worked.I will stay at my office until it stops snowing.Until you told me I had no idea of what Mary said.He has been riding since he was six.Each time I meet him, I talk seriously to him.She said she would phone me the moment she reached there .once you begin to learn korean,you will find it interesting.no sooner had the picnic baskets been unpacked than it began to rain.Scarcely had the lights been turned off when he fell asleep.2、地点状语从句，引导词" where 、wherever ”eg : A driver should slow down where there are many houses.He wanted to go wherever he could find work.3、目的状语从句，引导词"so that、 in order that 、lest 、for fear that 、in case"eg: The chairman hurried the meeting so that/in order that it might end before dark.The President must reject this proposal lest it should cause violence.Shut the window for fear that it may rain.Take you umbrella in case it rains.4、结果状语从句，引导词"so that 、so/such...that、 such that 、that "eg: Our camp is so far from the highway that we feel apart from the world when we are there.He made such a marvelous speech that he won warm applause.His answer was such that he didn't say yes and he didn't say no.5、原因状语从句，引导词"because、as、since、now that、seeing that、considering that、in that"eg: I teach because I enjoy finding ways of getting myself and my students out of the ivory tower and into the real world.As women were not supposed to be novelists, the writer took the name George Eliot.Since no one is against it, we will adopt the proposal.Now that you are all here,let's try to discuss the problem.Mary has done very well considering she has only one year experience of teaching.I like the city,but I like the country better in that I have more friends here.6、条件状语从句，引导词"if、unless、so/as long as 、provided that、providing that、on condition that、suppose that、supposing that、when、in case"eg: Supposing we can't get the necessary funds,what shall we do?You can camp in my field provided that you leave no mess.7、让步状语从句，引导词"though、although、 even though(even if)、as 、while、疑问词 +ever (no matter+疑问词结构)"eg：Though Jimmy was very tired,he kept on working.He insisted on doing it although I wanted him not to.John said he would;he didn't ,although.Even though I become a millionaire, I shall always be thrifty with my money.Difficult as the experiment was, it was well done by them.While I admit his good points, I can see his shortcomings.You will have the same result, whichever (no matter which)way you do it.Come and see me, whenever (no matter when)you are in Paris.8、比较状语从句，引导词"as...as、 not so/as...as 、more/-er...than"eg：She is as tall as Tom.She is not as/so tall as Tom is.She behaves more politely than him.The house is much tall er than it is wide.短文改错练习David had a stomachache on one morning. When he came to breakfast, he was crying .His mother asked why he was cried. David said his stomach was hurt. It was because he had eaten too much green apples the day before. She told him to go to Dr Scott's, he would give him some medicine. David got back to Dr Scott's office at nine o'clock. He found four people sit in the waiting-room. He has to wait for his turn .He didn't see the doctor since ten o'clock. When at last he sat down in the doctor's room, the doctor asked him what the matter was with him.。