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句子成分句子成分：主语、谓语、宾语、表语、定语、宾语补足语和状语1、主语：(1)由名词、代词(人称代词用主格)、动词不定式、动名词等充当,说明动作是“谁”发出的，主语是句子陈述的对象，说明是谁或什么，表示句子说的是“什么人”，或”什么事“，如“我写字”中的“我”，做出写字这个动作。“写”则是谓语，“字”是宾语，是接受谓语“写”这个动作的对象，因此是宾语。如：The painter painted a very nice picture. (画家画了一幅漂亮的画。) / They fought against SARS bravely. (他们勇敢地与非典搏斗。) / To see is to believe. (耳听为虚眼见为实). / Helping animals is to help people. (帮助动物就是帮助人类。)动词不定式或动名词做主语时可用it代替,而不定式或动名词移至表语或宾语之后。如：It is very comfortable to have a Class A seat during the long journey. (在长途旅行中能有个甲等座位简直太舒服了。) / Eating too much is bad for your health.(=It is bad for your health eating too much.) (吃得太多对你的身体不利。)（比较好看，避免头重脚轻）口语中常见主语或“主--系”省略：(It is) nothing. ((那)没有什么。)/ (It) doesn’t matter. ((那)没有关系。) / (I) thank you. ((我)谢谢你。)反意问句的附加问句,主语必须是代词：The man looks worried, doesn’t he (这个人看上去很着急不是吗？) / Tigers are dangerous animals, aren’t they (老虎是危险的动物不是吗？)祈使句一般省略主语。加主语时往往用来指定某个人。Keep the keyboards clean, children. (孩子们请保持键盘的清洁。) (省略了主语) / You go there and fetch me a glass of water. (你去给我弄一杯水来。)主语一般在句首,但在问句中会处于第二位和句尾；倒装句及there be句型主语在动词之后。如：Computers are made in this factory. (计算机生产于这家工厂。) / Where are they (他们在哪儿？) / Does the boy like staying home (这个男孩喜欢呆在家里吗？)主语与谓语必须保持单、复数的一致, 而谓语与表语或宾语之间没有这一要求。Neither Jim nor Rose has passed the exam. (Jim和Rose都没有通过考试。) / The Chinese people are a hardworking and brave people. (中华民族是一个勤劳勇敢的民族。)谓语：是对主语动作或状态的陈述或说明，指出“做什么”，“是什么”或“怎么样”，在主语后接宾语，又称受词，是一个动作的接受者。(1)由“不及物动词”、“及物动词+宾语”或“系动词+表语”等构成,说明主语所表示的人物“干什么”或“怎么样”。如：He travelled in space for the first time .(他首次在太空旅行。) / Who teaches you English this year (今年谁教你们的英语？) / The pizza has gone bad. (那块烤馅饼已经变坏。) /(2)谓语动词必须反映出人称、单复数、时态等信息,谓语动词往往由下列词语依序排列构成：［情态动词］+［时态助动词］（现在完成时）+［语态助动词］（如被动语态）+［主要动词］(不一定全部出现)。记住：谓语部分第一个动词往往是变形动词。如：I am sorry I am making so much noise but I have to. (对不起我发出了太大的声音但是只能这样。) / He can’t have finished reading the 800-page-long novel. (他不可能读完了那本长达800页的小说。) / Something must be done to stop the fowl flu from spreading out. (该采取措施防止禽流感蔓延。)(3)谓语动词切忌用“行为动词1 + 原形动词”、“be + 原形动词”。记住使用下列正确形式：①情态动词+原形动词。如：You’d better go over the lesson.（你最好复习这一课。）②shall/ will/ would+原形动词。如：They should have been there once.（他们应该去过那儿。）③be+现在分词或者过去分词。如：What are you doing this evening （今晚你打算做什么？）---表示一般将来时/ Many trees have been cut down since 1970s.（自从20世纪70年代大批树木被砍伐。）④have+过去分词。如：Many trees have been cut down since 1970s.（意思同上）⑤一般时问句和否定句中：do/does/did+原形动词。如：He does not enjoy himself very much.（他日子过的不好。）/ Did any of you see dinosaur eggs （你们当中有谁见过恐龙蛋吗？）⑥行为动词1+行为动词2 (不定式、动名词、现在分词、过去分词等形式)。如：He made up his mind to be a vet.（他拿定主意要做个兽医。）/ Feeling good about yourself is essential to feeling good about life.（自尊自爱是享受生活的根本。）/ They wake up the other family members, calling,“Merry Christmas!”（他们叫醒家庭的其他成员,呼喊着：圣诞快乐！）/ The kings of ancient Egypt had strong tombs built for themselves.（古代的埃及国王让人给他们自己修建坚固的坟墓。）不可用形容词、名词、代词、副词、介词短语等独立作谓语,必须在此之前加连系动词。(5)谓语动词单复数形式：单数形式的动词有：is,was,has,does以及“动词+s”；复数形式的动词有：are,were,have以及动词原形。其他动词不分单、复数。谓语部分第一个动词的形式 单数形式 复数形式一般现在时be(是)动词； 现在某些时态和语态的助动词be am (单一); are (单二); is (单三); are一般过去时be(是)动词； 过去某些时态和语态的助动词be was (单一); were (单二); was;(单三) were一般现在时have(有)动词； 现在完成时态的助动词have have (单一); have (单二); has (单三); have一般现在时行为动词和助动词do do (单一、单二); does (单三) do实意动词和连系动词的一般现在时动词（否定和疑问句除外） 原形动词(单一、单二); 动词+s /es (单三) 原形动词其他各时态语态的谓语动词 单复数形式相同记住：主语、谓语单复数必须保持一致。（参见“4、名词或代词作主语时和谓语之间的单复数的一致问题：”） Air and water is necessary to us all.(空气和水对于我们大家是必不可少的。)(6)一般问句和反意问句的回答不使用行为动词,应该使用“是”动词、情态动词、助动词(be,will,have,do以及变形)。如：The Olympic Games is held every other year, isn’t it ----Yes, it is.(奥运会每两年举办一次,是吗？----是的。)3、宾语：又称受词，是指一个动作（动词）的接受者。宾语分为直接宾语和间接宾语两大类，其中直接宾语（经常指被做的人）指动作的直接对象，间接宾语说明动作的非直接，但受动作影响的对象。一般而言，及物动词后面最少要有一个宾语，而该宾语通常为直接宾语，有些及物动词要求两个宾语，则这两个宾语通常一个为直接宾语，另一个为间接宾语。由名词、代词(人称代词要用宾格)、不定式、动名词、(宾语)从句充当,表示动作的承受者是“谁”或者是“何物”。如： The angel also came to Joseph and told him the same thing.(那个天使同样来到约瑟夫面前并且告诉他同样的事情。)(代词和名词充当两个宾语) / He told me that the company could not afford to pay him so much money.(他告诉我说公司付不起他那么多的钱。) (不定式作宾语) / They enjoy watching football games so much that they often forget their lessons. (他们如此喜爱看足球以至于常常忘记了他们的功课。) (动名词作宾语) / I think to be a children’s doctor is very rewarding.(我认为当个儿童医生是很值得的。) (从句作宾语)只有及物动词或介词才有宾语,不及物动词没有宾语,如果涉及到事物,则必须在不及物动词后面加合适的介词。Listen to the radio. (listen不是及物动词,故加to。) / Can you hear anything exciting (你能听到什么令人兴奋的消息吗？)宾语一般放在及物动词或介词的后面,但是在疑问句中,如果宾语是疑问词,则宾语要放在句首。介词的宾语如果是疑问词,则可以放在介词后或句首。如：What did he see (他看见了什么？) / What does he write a letter with (他用什么写的信？) / With what does he write a letter (他用什么写的信？)“动词+副词+宾语”结构中,如果宾语是代词,则代词必须放在“动”“副”之间。如：Please put the shoes away. (请把鞋子收起来。) / Please put away the shoes. (请把鞋子收起来。) / Please put them away. (请把它们收起来。)(5) 动词后面跟双宾语时可以采用两种结构：①动词+间接宾语(人)+直接宾语(物)。如：He often gives me some help. (他常常帮我。)②动词+直接宾语+介词+间接宾语。注意,一般情况介词用to,但动词是make, buy, borrow时,介词用for.如： Please make me a kite. (请给我做个风筝。)或Please make a kite for me.在“动词+宾语+宾补”结构中,如果宾语是不定式、动名词、宾语从句,则常用it做形式宾语,而将实际的宾语移到补语后面去。如：I found the job rather difficult. (我发觉这个工作相当难做。) / I found it rather difficult to do the job.4、表语：(1) 说明主语的身份、性质、状况等含义的成分,通常由形容词、副词、介词短语、名词、代词等充当。如：He became a doctor after he left high school.(高中毕业他当上了医生。) / The rubber wheels are over there.(橡胶轮子在那边。) / He does not feel like eating anything today because he has caught a bad cold.(他今天不想吃任何东西因为他得了重感冒。) / Who is it (谁呀？)表语只能放在连系动词(如：be,look,become,turn get,grow,feel,seem) 之后,对表语进行提问的句子除外。(3) 代词做表语一般用主格,口语中常用宾。如：It’s I. (It’s me.)是我。(4) 只能作表语的形容词有：sorry,afraid,alone,asleep,awake,ill,well,sure,interested等等。He was terribly sorry for his carelessness.(他很为他的粗心而歉疚。) / Please make no noise here; the baby is asleep.(请不要发出响动,婴儿正熟睡呢。) / I am only interested in sitting in a boat and doing nothing at all!(我只是对独坐孤舟无所事事感兴趣。) / I am not alone in thinking so.(并非只有我才这样想的。)5、定语：(1) 修饰名词或代词的成分,常由形容词、名词(含所有格)、代词(物主、指示、疑问、不定)、介词短语、不定式(短语)充当,在初三阶段还学习了定语从句做定语的知识。如：Put it in the top drawer.(把它放在最上层的抽屉里。) / France and Switzerland are European countries. (法国和瑞士是欧洲国家。) / His mother and father are both college teachers.(他的父母都是大学教师。) / This is the day that I can never forget in my life.(这是我一辈子难忘的日子。)(2) 单词做定语时一般放在被修饰的名词前面,而且有一定的次序：冠词/ 物代 年龄/形状/ 大小/温度 色彩 来源 质地/ 材料 目的/ 用途 被修饰的名词(中心词)a the my his … old,young,… red, yellow, blue, … Chinese, English, American, … wooden, woolen, glass, silk, paper … meeting, tennis, sports, reading, swimming, … box, shoes, room, pig …long,short, round, square…big, large, small, little…hot, cold, warm, cool…时间副词(now,then,today,yesterday,...)、地点副词(here,there,back,in,out,home,...作定语时放在被修饰的名词后面。如：I could not find my way out, so I stayed there all along. (我找不到出去的路,所以就一直呆在那儿。)介词短语修饰名词时只能放在名词的后面：The monkey in the cage was caught yesterday. (笼子里的猴子是昨天逮着的。)形容词修饰复合不定代词时,往往后置。如：He remembered everything unusual. (他记得所有不寻常的事情。)6、状语：(1) 说明动作“何时”、“何地”、“如何”发生,或者说明形容词或副词的程度,一般由副词、介词短语、不定式、状语从句等充当。如：I was not born yesterday.（我又不是昨天才出世的娃娃。）/ For many of these families a college education was something new.（对其中的许多家庭来说,大学教育是件新事物。）/ He woke up to find his house on fire.(他醒来发现房子着火了。) / You cannot leave until your work is finished.(在你的工作被完成以前你不能离开)多个状语相连时,一般先单词、后短语,先地点、后时间,先小概念、后大概念。如：He went ouf of the room at a quarter to 23:00 last night and then disappeared into the dark.(他昨夜22点3刻从房间里出来,然后消失在黑暗之中。) /状语还可以用从句来充当,有时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、比较状语从句、让步状语从句、条件状语从句等。(4) 注意：由于状语属于修饰性的成分,常归入谓语,因此不作为句子的主要成分。7、宾语补足语：(1) 补充说明宾语的动作、状态的成分为宾语补足语,常由名词、形容词、动词非谓语形式(不定式、现在分词、过去分词等)、介词短语等充当。如：Call him Jim, please. (请叫他Jim。) / I tried my best to make him happy. (我竭尽所能让他开心。) / Ask her to come to dinner tomorrow. (请他明天来。) / He let the smaller animals bring food to him. (他让小动物们给他带食物来。)部分表示位置、方向的副词也可以作宾语补足语。如：Let him in, I tell you! (我跟你说,让他进来！)/ Please put it away. (请把它收起来。)

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