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单复数形式相同
记住：主语、谓语单复数必须保持一致。
Air and water is necessary to us all.(空气和水对于我们来说是必不可少的。) (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：
(1) 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)
(2) 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？) (3) 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？)
(4)“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.
(6) 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.
(7) 宾语可以由从句充当。
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
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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？)
(2) 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) 表语也可以由从句充当。
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)
(3) 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。)
(4) 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。)
(5) 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) 定语还可以用从句充当,详见 定语从句。
(7) 注意：由于定语属于修饰性的成分,因此它常归入主语、宾语、表语之中,不作为句子的主要成分。
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)
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(2) 副词作状语位置较为灵活;介词短语作状语,位置基本固定；不定式作状语,一般表示目的、结果；从句作状语.
(3) 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 out 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。) /
(4) 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。 (5) 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。)
(2) 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。) (3) 不定式或分词作宾语补足语
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