按要求改写句子。1. Mr. Wood teaches us math. (改为一般疑问句) ____________ Mr. Wood ____________us math? 2. I have a yellow dress. (改为否定句) I ________-六年级英语

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手帕树叶半空飘。handkerchief,leaf,half↓

  • 英语名词单数变复数口诀: 
     (一)  规则变化 
    名词单数变复数,直接加 -s 占多数;   
    s, x, z, ch, sh 来结尾,直接加上 -es;   
    词尾是 f 或 fe,加 -s 之前先变 ve;   
    辅母 + y 在词尾,把 y 变 i 再加 -es;   
    词尾字母若是 o,常用三个已足够,要加 -es 请记好,hero, tomato, potato。  

    (二)  不规则变化  
    男人女人 a 变 e,鹅足牙 oo 变 ee;   
    老鼠虱婆也好记,ous 变 ic;   
    孩子加上 ren,鱼鹿绵羊不用变。  
    【解说】  
      1. 英语名词有单数和复数的区别,单数表示“一”,复数表示“多于一。”
    名词由单数变复数,多数是规则的变,直接加 -s,例如:book → books,  girl → girls。但以 -s, -z, -x, -ch, -sh 结尾的名词,变成复数时加 -es,
    例如:bus → buses,  buzz → buzzes, box → boxes, watch → watches,  brush → brushes 
      2. -f(e) 结尾的名词单数变复数歌诀:
    ① 树叶半数自已黄,妻子拿刀去割粮,架后窜出一只狼,就像强盗逃命忙。
    ② 妻子持刀去宰狼,小偷吓得发了慌,躲在架后保己命,半片树叶遮目光。
    例如:leaf (树叶,叶子),half (一半),self (自已),wife (妻子),knife (刀子),shelf (架子),wolf (狼),  thief (窃贼,强盗) 和 life (生命),
    这些名词变成复数时,都要改 -f (e) 为 v,再加 -es。  
      3. -f 结尾的名词直接加 -s 变复数歌诀:海湾边、屋顶上,首领奴仆两相望;谁说他们无信仰,证据写在手帕上。
    例如:gulf, roof, chief, serf, belief, proof, handkerchief,这些名词变复数直接加 -s。  
      注:scarf(围巾;披风) 可以先改 f 为 ve 再加-s,也可直接加 -s。  
      4. 辅音字母 + y 结尾的名词,把 y 变 i 加 -es。
    例如:baby → babies, country → countries, family → families;而 -y 前是元音时,-y 不变,直接加 -s。例如:day → days, boy → boys  
      5. 以 -o 结尾的名词变复数时,多数直接加 -s。
    例如:radio → radios,  piano → pianos,  kangaroo → kangaroos;有的须加 -es,中学课本中有几个这样的单词,可以通过一句口诀来记忆:黑人英雄爱吃西红柿和土豆。
    即:Negro → Negroes, hero → heroes, tomato → tomatoes, potato → potatoes;有的以 o 结尾的名词既可加 -s 也可加 -es。
    例如:volcano (火山) → volcanos / volcanoes 等。  
      6. 名词复数的不规则变化需要特别记忆。
    例如:man → men, woman → women, goose → geese,  foot → feet, tooth → teeth, mouse → mice, louse (虱子) → lice, child → children, fish → fish, deer (鹿) → deer, sheep → sheep 等。  
      7. 初中课本中表示“某国人”的名词复数形式变化可通过歌诀记忆:中日不变英法变,其余 -s 加后面。
    例如:Chinese → Chinese, Japanese → Japanese;
    Englishman → Englishmen, Englishwoman → Englishwomen, Frenchman → Frenchmen, Frenchwoman → Frenchwomen;
    American → Americans, Rusian → Rusians, Arab → Arabs, German → Germans 等。 
      8. 不可数名词一般只有单数形式,没有复数形式。有些不可数名词可借助单位词表示一定的数量。
    例如:a cup of tea 一杯茶
    , two piece of paper 两张纸, an item of news 一则新闻

  • 考点名称:否定句

    • 否定句:
      表示否定的句子。必须有否定词。
      否定句的构成形式:
      a. 谓语为be动词时,“be+not "一名学生。
      b. 谓语为实义动词而且没有情态动词和助动词时,“do/ does/ did+not"构成否定。 
      例:I do not like dancing. 我不喜欢跳舞。 
            He does not want to go to school. 他不想去上学。
      c. 谓语为“情态动词+实义动词”时,“情态动词+not”构成否定。 
      例:You must not smoke. 你千万不要吸烟。 
             I can not catch it. 我抓不住它。

    • 否定句在英语语法中可以分为九类:
      (1)一般否定句
      I don't know this. No news is good news.
      There is no person(smoking)/not a person/not any person(smoking)in the house.
      (2)特指否定
      He went to his office, not to see him.
      I am sorry for not coming on time.
      I don't think/believe/suppose/feel/imagine you are right.
      (3)部分否定
      All the answers are not right
      All is not gold that glitters
      I don't know all of them.
      I can't see everybody/everything.
      Both of them are not right.
      (4)全体否定
      None of my friends smoke.
      I can see nothing/nobody.
      Neither of them is right.
      Nothing can be so simple as this.
      (5)延续否定
      You didn't see him, neither/nor did I.
      You don't know, I don't know either.
      He doesn't know English, let alone/to say nothing of/not to speak of(更不用说)French.
      (6)半否定句
      We seldom/hardly/scarcely/barely hear such fine singing.
      I know little English. I saw few people.
      (7)双重否定
      You can't make something out of nothing.
      What's done cannot be undone.
      There is no sweet without sweat.
      No gain without pains.
      I can't help /keep/ laughing whenever I hear it.
      No man is so old but(that)he can learn.
      (8)排除否定
      Everyone is ready except you.
      He did nothing but play.
      But for your help, I couldn't do it.
      (9)加强否定
      I won't do it at all.
      I can't see it any more.
      He is no longer a boy.

    • 否定转移的形式与用法:
      一、动词的否定转移
      1.形式上否定主句的谓语,实际上是否定从句的谓语
      当动词“think”、“believe”、“suppose”、“imagine”、“expect”、“feel”的主语是第一人称,谓语动词为没有任何副词修饰的一般现在时,它们的否定式实际上是对宾语从句的否定。
      表示说话者提出一种委婉的看法或主张。如:
      I think that he will help us.——I don’t think that he will help us. 我认为它不会帮助我们。
      I believe that he is right.——I don’t believe that he is right. 我认为他不对。
      I suppose that he likes it.——I don’t suppose that he likes it. 我想他不喜欢它。

      2. 形式上否定谓语动词,实际上否定复合宾语
      当动词“think”、“believe”、“suppose”、“imagine”、“expect”、“feel”、“find”的主语是第一人称,谓语动词为没有任何副词修饰的一般现在时,它们前面的否定式实际上是对复合宾语的否定。表示说话者所提出的一种委婉的看法或主张。如:
      I think math difficult. — I don’t think math difficult. 我认为数学不难。
      I find the story interesting. — I don’t find the story interesting. 我认为这个故事没有趣。
      I expect so. —I don’t expect so. 我认为不会。

      二、动词“think”、“believe”、“suppose”、“imagine”、“expect”、“feel”在下列情况下,否定不转移:
      1.这些动词跟其他另一个动词一起做并列谓语时,否定不转移。如:
      I believe and hope he won’t do that. 我相信并且也希望他将不会那样做。
      I feel and admit that we are not foolish. 我觉得并且也承认我们并不愚蠢。

      2.用于疑问句时,否定不转移。如:
      Do you think it is not going to rain? 你认为天不会下雨吗?
      Don’t you believe that he has done a good thing? 难道你不相信他做了一件好事?

      3.用作插入语时,否定不转移。如:
      Li Lei, I think, won’t be angry with you. 我想李蕾不会生你的气。
      Tom, I suppose, won’t be against it. 我猜想汤姆不会反对。
      Mike, I believe, hasn’t seen the film. 我认为迈克没有看这场电影。

      4.动词前有其他副词修饰时,否定不转移。如:
      I really don’t think it’s necessary for us to go there now. 我的确不认为我们有必要去那儿。
      I feel strongly that he shouldn’t do such a thing. 我强烈地认为他不应该做那样的事。

      5.动词为非一般现在时或主语不是第一人称时,否定不转移。
      I thought that he wouldn’t come back soon. 我原以为他不会回来得这么快。
      She didn’t believe that he became a good boy. 她不相信它变成了一个好孩子。
      He thinks that he isn’t fit for the job. 他认为他不适合这件工作。
      He doesn’t believe that what we told him is true. 他不相信我们告诉他的事是真的。

      6.当宾语从句中含的否定为“not……at all”、“not a little”、“not a few”、“not enough”、“can’t help”等固定搭配时,否定不转移。如:

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