1、初中英语从句详解v 宾语从句一定义：宾语从句是指在一个句子中充当宾语的句子如：He said that he wanted to be a teacher when he grew up.二宾语从句有三种类型：1由从属连词that引导的宾语从句表示陈述意义，连词that常可被省略。例如：I hope (that)they will have fun. Mary said that she felt sleepy.Cant you see (that) Im a bird?注意：（1）当主句的谓语动词是think,believe等时，宾语从句尽管要表示否定意义，却不用否定形式，而将think等动
2、词变为否定形式。如：I dont think he will come.我认为他不会来。（2）两个表示陈述意义的宾语从句并列时，有时省去第一个从句的连词that，但第二个从句的连词that一般不可以省略。如：He told me (that)they could not decide what to do and that they asked my advice.2.由从属连词if或whether引导的宾语从句表示“是否（有，能，已经）”等一般疑问句的含义。例如：I wonder whether (if) he lives here.3.由连接代词who,whom,whose,what,wh
3、ich和连接副词when,where,how,why等引导的宾语从句表示“谁，谁的，什么，哪（个，些），何时，何地，怎样，为什么”等等特殊疑问句的意义。除了连接词及被修饰的词提前以外，宾语从句用陈述句语序。例如：To masked who could give the message to her mother.Do you know what he said just now? I wondered how old his brother was.三.宾语从句的时态呼应：“主现则从任，主过则从过，客观真理一般现”1当主句是现在时或将来时的时候，宾语从句可以用所需要的任何时态。2主句是过去时，
4、宾语从句一般只能用过去时的某种形式；当从句叙述的是客观事实或一般真理时，宾语从句仍然用现在时态。3情态动词must一般不用于过去时，但却可以用于主句是过去时的宾语从句中。四.宾语从句的语序1宾语从句的连接词后加陈述语序（主语在前，谓语在后）如：I want to know if he can come tomorrow 2当连接词本身又是宾语从句的主语时，后面直接加谓语动词如：She asked me who had helped him v 状语从句英语中,修饰动词、形容词、副词等的句子成分叫状语。状语的功用：状语说明地点、时间、原因、目的、结果、条件、方向、程度、方式和伴随状况等，根据状语
5、的功能状语从句可分为：时间状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句。一时间状语从句：在一个句子中作时间状语的句子。时间状语的连接词：when（当时候）while（当时候）as（当时候）after（在以后）before（在以前）as soon as（一就）since（自从到现在）till /until（直到才）by the time（到为止）依旧是连接词后加陈述语序。1. when当的时候（一般情况下：主将从现）I will become a teacher when I grow up 2. while当时He visited a lot of places while
6、 he was traveling.3. as在的同时；一边一边He smiled as he stood up.4. after在之后He left the classroom after he had finished his homework the other day.5. before在之前Mr. Brown had worked in a bank for a year before he came here.6. as soon as一就(一般情况下：主将从现)We began to work as soon as we got there.I will write to you
7、 as soon as I get home.7. since自以来到现在表示自过去的一个起点时间到目前(说话时间)为止的一段持续时间。主句一般用现在完成时，从句用一般过去时。Mr Green has taught in that school since he came to China three years ago.(还可以用作介词，本句从句还可以用短语：since three years ago(自三年前以来)表示。)8till /until直到都可以作连词，连接时间状语，也可以作介词，与其它词构成介词短语，在句中作状语。They walked till /until it was d
8、ark.Xiao Ming didnt leave home till / until his father came back.9. by the time到为止(所在句子的主句应用现在或过去完成时)By the time he gets there , his father has already gone.By the time I got to school, the class had already began.用法辨析：1.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
9、 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.当的住在农村时，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
10、was watching TV.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都表示主
11、、从句动作同时发生，三者差异如下：as 表示“一边。一边的意思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、whenand then; at that moment (正在那个时候)3.常用于常见搭配中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。lt 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.)When I had read the article, he called
12、 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 )When 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)He 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She thought I was talking about her daughter, while, in
13、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)While 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)Mother was worried because little Alice was ill, especially as (when/ while
14、) 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)2.由till或until引导的时间状语从句。till和until一般情况下两者可以互换，但是在强调句型中多用until。并且要注意的是：如果主句中的谓语动词是瞬时动词时，必须用否定形式；如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。例如：I worked until he came back.我工作到他回来为止。I didnt work until he came back.他回来我这才开始工作。3.由since引导的时间状语从
15、句。since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。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时，表述为：现在完成时+since+一般过去时。但在It is 时间since从句的句型中，主句多用一般现在时。例如：It is five months since our boss was in Beijing.我们老板离开北京有五个月了。知识扩展1. It issince 从.以来多长时间了It is five years since we met last time.2. It is+before(。才。)It was a long time befor
16、e I went to sleep again.It was an hour before(until) the police arrived.二.原因状语从句：在一个句子中作时间状语的句子。连接词：由连词because, since, as引导,也可由for, now that 等词引导1.I didnt go to school yesterday because I was ill.2. Since everybody is here, lets begin our meeting.既然。3. As you are in poor health, you should not stay
17、up late.既然。4.I asked her to stay to tea, for I had something to tell her.用法辨析：because , since , as , for辨析1）because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，就用as或since。I didnt go, because I was afraid.Since /As the weather is so bad, we have to delay our journey.2）由because引导的从句如果放在句末，且前面有逗号，则可以用f
18、or来代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用for。He is absent today, because / for he is ill.He must be ill, for he is absent today.三、条件状语从句连接词：if如果, unless (=if not)如果不、除非(让步)1.If it doesnt rain tomorrow, we will go hiking.2.I will go to the party unless he goes there too.3.You will be late unless you leave im
19、mediately.=If you dont leave immediately, you will be late.条件状语从句：主将从现.He will not leave if it isnt fine tomorrow.四、目的、结果状语从句目的状语从句是指在一个句子中充当目的状语的句子。结果状语从句是指在一个句子中充当结果状语的句子目的状语从句连接词so that, sothat , in order that 引导。结果状语从句连接词sothat, suchthat, so much/manythat引导。1. sothat 如此以至于He always studied so ha
20、rd that he made great progress.2. so that以至于,以便于Ill run slowly so that you can catch up with me. (目的)I opened the window so that fresh air might come in. (目的)3. suchthat 如此以至Its such nice weather that all of us want to go to the park.4. in order that=so that为了We shall let you know the detailssoon in
21、 order that you can/may make your arrangements.5.比较：so和such 其规律由so与such的不同词性决定。such 是形容词，修饰名词或名词词组，so 是副词，只能修饰形容词或副词。so 还可与表示数量的形容词many, few, much, little连用，形成固定搭配。so nice a flowersuch a nice flower so many / few flowerssuch nice flowers so many peoplesuch a lot of people （so many 已成固定搭配，a lot of 虽相
22、当于many，但a lot of 为名词性的，只能用such搭配。）难点so+形容词或副词so+形+a(an)+单数可数名词so +many /few+复数可数名词so +much/ little+不可数名词sothat与suchthat皆可引导目的地状语从句和结果状语从句。The boy is so young that he cant go to school.He is such a young boy that he cant go to school so +adj/adv.+ that，such +n.+ that 以上两种句型都表示结果so为副词,后接形容词，副词原型，可数名词前
23、有many, few；不可数名词前有much, little修饰时，应采用句型：so many (few, much, little )+n.such为形容词,后只能接名词。这名词既可以地可数的，也可以是不可数的。如果这名词是可数的,则必须在名词前加不定冠词a(an).常见的形式是:sucha (beautiful)garden,such(nice)people.五、让步状语从句让步状语从句是指在句子中作让步的状语的句子连接词：though, although.，whetheror not 难点：though, although当“虽然”讲,都不能和but连用. Although/though
24、but的格式是不对的.但是他们都可以同yet (still)连用.所以thought (although)yet(still)的格式是正确的.Wrong: Although he is rich but he is not happy.Right : Although he is rich, yet he is not happy.虽然他很富有,然而他并不快乐.Right : Although we have grown up, our parents treat us as children Right : Although we have grown up, our parents sti
25、ll treat us as children.尽管我们已经长大了,可是我们的父母仍把我们看作小孩.although, though 辨析although不能作并列连词，although不能作副词，放在词尾表示强调时要用even though.1、Even though I didnt under a word, I kept smiling.尽管【典型例题】1）_she is young, she knows quite a lot.A. WhenB. HoweverC. AlthoughD. Unless 2)ever if, even though.即使Well make a trip
26、even though the weather is bad.3) whetheror not不管都Whether you believe it or not, it is true.no matter 从句结构：no matter +特殊疑问词疑问词+陈述语序或特殊疑问词+后缀ever+陈述语序No matter what happened, he would not mind.Whatever happened, he would not mind.替换：no matter what = whatever no matter who = whoever no matter when = w
27、henever no matter where = wherever no matter which = whichever no matter how = however 注意：no matter 不能引导主语从句和宾语从句。（错）No matter what you say is not useful now.（对）Whatever you say is not useful now.你现在说什么也没用了。(Whatever you say是主语从句)（错）Prisoners have to eat no matter what theyre given,（对）Prisoners have
28、 to eat whatever theyre given.囚犯们只能给什么吃什么v 定语从句定语是指在句子中用来修饰名词、代词的成分定语从句是指在一个句子中作定语的句子，定语从句要放在所修饰的词后如：I have met the doctor who is in the No.1 hospital.定语从句的连接词：1.连接代词：who、which、whom、whose、that 2.连接副词：when、where、why 选用连接词的关键是看先行词(定语从句所修饰的名词或代词)一、连接代词的选用：1.who指人，先行词为人,在从句中做主语Yesterday I helped an old
29、man who lost his way.2. whom指人，先行词为人,在定语从句中充当宾语，常可省略。Mr. Liu is the person (whom) you talked about on the bus.注意：关系代词whom在口语和非正式语体中常用who代替，可省略。3.which指物，先行词为物,在定语从句中做主语或者宾语，做宾语时可省略This is the pen (which) he bought yesterday.4. that指人时，相当于who或者whom；指物时，相当于which。在定语从句中做主语或者宾语，做宾语时可省略。The number of the
30、 people that/who come to visit the city each year rises one million.Where is the man that/whom I saw this morning?5. whose通常指人，也可指物，在定语从句中做定语,译成.的He has a friend whose father is a doctor.指物时，常用以下结构来代替Do you like the book whose cover is yellow?=Do you like the book the color of which is yellow?介词+连接代
31、词引导的定语从句连接代词在定语从句中做介词宾语时,从句常由介词+连接代词引导The school (that/which) he once studied in is very famous.The school in which he once studied is very famous.注意：1.含有介词的动词短语一般不拆开使用，如：look for, look after, take care of等This is the watch which/that I am looking for. (T)This is the watch for which I am looking. (F)2.若介词放在连接代词前，连接代词指人时用whom，不可用who或者that；指物时用which，不能用that；连接代词是所有格时用whose The man with whom you talked is my friend.The plane in which we flew to Canada is very comfortable. (T)3.“介词+连
