1、初中英语语法英语从句总结初中英语语法-英语从句总结初中英语语法总结（从句）从句分为定语从句，状语从句和名词从句三大类。定语从句又分为限定性和非限定性从句两种，由关系代词或关系副词引导，修饰主句的某个成分。状语从句分为时间、结果、让步、原因、条件及行为方式状语从句。名词从句包括主语、宾语、表语和同位语从句及there be句型。 主系表结构、主谓（宾）结构、there be结构是英语的三大基本句式，无论一个句子有多长、多复杂，它总是属于这三大句式中的一种。学习基本句式，句子成分是一个关键的概念，它是指句子的组成单位，不同的句式由不同的句子成分组成。如：主系表结构的成分有主语、系动词、表语；主谓（
2、宾）结构的成分有主语、谓语、宾语；there be 结构的主要成分是主语。英语中的句子成分主要有：主语、谓语、宾语、定语、状语、补语、同位语，等等。这些句子成分可以由单词、词组或句子充当，当这些成分由句子充当时，我们就有了相应的从句，如：充当主语成分的句子为主语从句，充当宾语成分的句子为宾语从句，等等。 英语从句三大类型按一般说法，可分为三大类14种从句。一,名词性从句1主语从句Whether its right or not remains to be seen.2宾语从句I wonder whether its right or not.3同位语从句This is a question w
3、hether its right or not.4表语从句The question is whether its right or not.二,定语从句1限定性定语从句She is the student who can speak English well.2非限定性定语从句She is the student, who can speak English well.三,状语从句1时间状语从句The fact will come out when he comes here.2地点状语从句You can go wherever you like.3原因状语从句Pay more attenti
4、on to your lessons because you are a student.4方式状语从句He walks as if he were a king.5目的状语从句She went to Japan so that she could learn Japanese well.6结果状语从句She went to Japan so that she learned Japanese well.7条件状语从句I will understand it if he tells me.8让步状语从句He knows a lot though he is little.1定语从句There
5、are some old books in the box.The boy dressed in blue is from America.分清几个概念：先行词与关系代词/关系副词。先行词是指定语从句所修饰的中心词；关系代词主要有who, whom, whose, which, that; 关系副词主要有 when, where, why。关系代词和关系副词有两个作用，一是连接主句和从句的作用，二是在定语从句中做成分。定语从句分为：限定性定语从句和非限定性定语从句, 限定性定语从句如果去掉会影响句子意义的完整性，非限定性定语从句即使去掉也不会影响句子意义的完整性，如： July is the
6、month when we have a lot of rain. There are many plays (that) Id like to see. The meeting was put off, which surprised us a lot. This note is left by Mary, who was here a moment ago.1.非限定性定语从句，其作用为：对所修饰的成分作进一步的说明，它与主句用逗号隔开。此类从句省略后其余部分仍可成立。在非限定性定语从句中，which可代表前面的整个句子；代表人时只能用who，whom，而不能用that；as也可用作关系代
7、词。例如:2.1.The telephone，as we know，was the invention of Alexander Graham Bell3.2.Franklin DRoosevelt，who died there on April 12，19454.3.Living in a damp（潮湿的） house for a long time is harmful to ones health，which is known to everyone5.限定性定语从句中that可代表人和事，而which只代表事；二者在从句中作主语或宾语。that作宾语时常可省略，which则不能，而且
8、其后的“不及物动词+介词中的介词不能省略。which作宾语时，先行词与which之间的介词不能省。例如：6.1.The first doll that could say“mama”was invented in 18307.2.The second half of his voyage was by far the more dangerous part，during which he sailed round the Cape Horn合恩角代表all，anything，something，nothing，much等词时，用that而不用which，that作宾语可省略。例如：1.I ca
9、re anything that has something to do with it 2.Youd better do something he prefers to do to please him 3.That is the last time we met each other4.I came across the woman you told me about yesterdaywho和whom引导的从句用来修饰人，分别作从句的主语和宾语。where是关系副词，用于表示地点的定语从句，而when用来表示时间。whose是关系代词，修饰名词作定语。例如:1.Henry Ford is
10、 the person who is most responsible for developing the idea of mass production2.The knee is the joint where the thigh bone meets the large bone of the lower leg3.The next morning， when she came down to breakfast ， Mary was beaming with the pleasure of a new，great discovery4.The visiting professor is
11、 a famous scientist whose son studies in my department注意几点：that可替代who, whom（指人），也可替代which（指物） whose 既可指人又可指物 引导定语从句的关系代词紧跟介词做从句的宾语时，不用that,只用which/ 不能用which,只能用that的情况.几个例子：Is she the girl that/who sells flowers The train that/which has just left is for Xian. The people (who/that/whom) you were talk
12、ing to were Russians. The girl to whom I spoke is my cousin. I have never met the boy whose mother is a famous actress. My book is on the table whose legs are broken. He went to China in 1945, when the War World was over. Look, this is the house where the writer was born. The tool with which he is w
13、orking is called a wrench(扳手).2状语从句He swims fast.Nervous, he opened the letter.Legs broken, the soldier crawled back home.She used to stay up until midnight.With a book in his hand, the teacher came in.状语从句可分为：时间状语从句(主要由when，whenever，after，before，a5，since，once，until，while等连词引导)，结果状语从句(由sothat和suchth
14、at连接)，让步状语从句(由though，although， no matter，even if， however，whatever等词引导)，原因状语从句(由as，because，since和for引导)，条件状语从句(由if， whether，as long as，provided that等词引导)，地点状语从句(由where引导)，行为方式状语从句(由as引导)。有时条件状语从句中，主句不可以用将来时，而用一般时代替。状语从句中的 “主语+be”可以省略，前提是：从句主语和主句主语一致，且从句谓语“be”省略后的结构为“连词+现在分词过去分词介词短语形容词名词短语”。) 例如：1.If
15、 necessary，I would like to see you in your office. 2.Although seriously wounded，he never complained条件状语从句：1）Lets go out for a walk unless you are too tired.( 除非,若不；相当于if-not)即：If you are too tired,well not go out for a walk.2）You may borrow my book as long as you keep it clean.(只要，表示条件的唯一性)3）Take yo
16、ur umbrella in case it rains.（以防-，以免-）4）I can tell you the truth on condition that you promise to keep a secret.(条件是-)5）Supposing it rains, shall we continue the sports meeting( 如果,假如)6）He wont be against us in the meeting provided/providing that we ask for his advice in advance.( 假如,除非以为条件)7）You wi
17、ll be successful in the interview once you have confidence.(一旦-就-)方式状语从句方式状语从句通常由as, (just) asso, as if, as though引导。1） as, (just) asso引导的方式状语从句通常位于主句后，但在(just) asso结构中位于句首，这时as从句带有比喻的含义，意思是正如，就像，多用于正式文体，例如：Always do to the others as you would be done by. 你希望人家怎样待你，你就要怎样待人。As water is to fish, so ai
18、r is to man. 我们离不开空气，犹如鱼儿离不开水。2） as if, as though两者的意义和用法相同，引出的状语从句谓语多用虚拟语气，表示与事实相反，有时也用陈述语气，表示所说情况是事实或实现的可能性较大。汉译常作仿佛似的，好像似的，例如：1.They completely ignore these facts as if (as though) they never existed.他们完全忽略了这些事实，就仿佛它不存在似的。（与事实相反，谓语用虚拟语气。）2.He looks as if (as though) he had been hit by lighting.他那
19、样子就像被雷击了似的。（与事实相反，谓语用虚拟语气。）3.It looks as if the weather may pick up very soon.看来天气很快就会好起来。（实现的可能性较大，谓语用陈述语气。）说明：as if / as though也可以引导一个分词短语、不定式短语或无动词短语，例如：He stared at me as if seeing me for first time. 他目不转睛地看着我，就像第一次看见我似的。He cleared his throat as if to say something. 他清了清嗓子，像要说什么似的。比较状语从句1）You se
20、em to know music as well as you know astronomy(天文学).(as-as 结构)2）There was no garden so lovely as his in this city. (no so-as 结构)3）Finally he has made as much money as he wanted. (as +adj +n.+as 结构)4）Your watch is not the same as his.(the same as结构)5）I never met such a man as your younger brother.(su
21、ch-as 结构)6）She studies more diligently than her classmates.(more than结构)7）No other book has had a greater influence on my life.(否定词和比较级连用表示最高级含义。)8）This teacher explained the problem more clearly than any other teacher. (比较级与 “any other one”连用表示最高级含义。)9）The more you read, the better will you write.(
22、the more-the more 结构)11) He earned no more than 800 dollars a month. 他一个月只挣800美元。（no + 比较级+than结构）.3名词从句名词从句包括主语从句、宾语从句，其中有介词与形容词的宾语从句、表语从句和同位语从句。1）主语从句He is a teacher.Learning English well could take you a lot of time.a.由what、wh-ever 等代词引导的主语从句, 一般放在句首，不能用it 做形式主语：What I want to know is his address
23、.Whatever was said here must be kept secret.Whatever she did was right.Whoever comes will be welcome.b.由连词that 引导的主语从句, 在大多数情况下，这个从句都放在句子后部，而用代词it 作形式上的主语：That I may not be able to come is possible. = It is possible that I may not be able to come.That we need more equipment is quite obvious. = It is
24、 obvious that we need more equipment.That he will refuse the offer is unlikely. = It is unlikely that he will refuse the offer. 三个固定句型(属于此类)： It + 名称 + that：It is a pity that we cant go. It + 形容词+ that：It is clear that Tom has returned. It + 过去分词+ that：It is said/believed/reported/known that.c.由连接代词
25、或连接副词（或whether）引导的主语从句, 这个从句可以直接放在句首作主语，也可放到句子后部去，前面用it 作形式主语：Which is the better choice is obvious. = It is obvious which is the better choice.Who will go for the meeting has not been decided. = It has not been decided who will go for the meeting.Where he lost his gold watch remained a mystery. = I
26、t remained a mystery where he lost his gold watch.When we shall have our sports meet is still a question. = It is still a question when we shall have our sports meet.Whether he will join us wont make much difference. = It wont make much difference whether he will join us. Why the old man went to the
27、 castle is still unknown. = It is still unknown why the old man went to the castle. How he had managed to achieve so much at such a young age fascinated many people. = It fascinated many people how he had managed to achieve so much at such a young age.2)宾语从句He likes Chinese very much.Im surprised at
28、 his young age.a.由that引导的宾语从句，一般做动词的宾语，that可以省略The letter says (that) they are leaving on the 13th.I dont doubt (that) they will be able to overcome the difficulties.She reminded me that I had a meeting to attend that evening.b.由what，who，which, how，where，when, whether (if) 等引导的宾语从句，既可以做动词的宾语，又可以做介词的
29、宾语I dont know whether these figures are accurate.Ill read whichever book you recommend.Ill show you what I have put down in my note-bookHas she informed you when they are to hold the meeting.She was never satisfied with what she had achieved.Whether that is a good solution depends on how you look at
30、 it.c. 在某些句型中，特别是带符合宾语的句子中，that引导的从句常常移到后部去，前面用it做形式宾语 We all thought it a pity that the conference should have been cancelled. I took it for granted that they were not coming. d. 在“be + 形容词”这类结构后，that引导的从句，有些在概念上接近宾语，而在结构上却接近状语 Im afraid that I have made a mistake. We are sure that we shall success
31、. We are fully confident that we can overcome the difficulties. Im not sure whether she would like the idea.一些表语性的形容词，如：alarmed，amazed，annoyed，astonished， certain，confident， disappointed， glad， pleased， proud， sad， shocked， sure， surprised， worried， ect.做表语时，后面可跟由that， how等引导的宾语从句。例如：1.I was amazed how he could pass the exam without attending the lectures2.He is confident that he will pass the Band 6 examination3.She was surprised how simple his problem is4.We are all pleased that he will be able to pass the final examination.3)表语从句
