The police ____ the murderer everywhere when he suddenly appeared in a theatre.[ ]A. is searching forB. were searching for C. are searching for D. was searc-九年级英语

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那男孩把眼睛张开了一会儿,看看船长,然后就去世了。

(5)表示过去一段时间内经常或反复的动作。常与always,never等连用。
Mrs. Peter always carried an umbrella.彼得太太过去老是带着一把伞。
(只是说明她过去的动作,不表明她现在是否常带着伞。)
比较:
Mrs. Peter always carries an umbrella.彼得太太老是带着伞。
(说明这是她的习惯,表明她现在仍然还习惯总带着一把伞)
Mrs. Peter is always carrying an umbrella.彼得太太 总是带着一把伞。
(表示说话者对这一动作或行为厌烦)
I never drank wine.我以前从不喝酒。
(不涉及到现在,不说明现在是否喝酒)

(6)如果强调已经终止的习惯时要用 used to do(过去常常做,而现在不那样做了)
He used to drink alcohol.他过去喝酒。
(意味着他现在不喝酒了。喝酒这个动作终止了)
I used to take a walk in the morning.我过去是在早晨散步。
(意味着现在不在早晨散步了)
比较:
I took a walk in the morning.我曾经在早晨散过步。
(只是说明过去这一动作)

(7)有些句子,虽然没有表示过去确定时间的状语,但实际上是指过去发生的动作或存在的状态的话,也要用过去时。
I didn''t know you were in Paris.我不知道你在巴黎。
(因为在说话时,我已经知道你在巴黎了。这句话指的是说话之前,所以只能用过去时表示。实际上,这句话暗指:But now I know you are here.)
I thought you were ill.我以为你病了呢。
(这句话应是在说话之前,我以为你病了。但是现在我知道你没病)

  • 一般过去时三变技巧:
    一变:肯定句变为否定句
    技巧1.当句中含有情态动词或助动词could,would,should等时,可直接在其后面加not构成否定句。例如:
    I could get you a concert ticket. → I could not / couldn't get you a concert ticket.
    技巧2.当句中含有系动词was,were 时,可直接在其后加not构成否定句。例如:
    I was on the Internet when you called me. → I was not / wasn't on the Internet when you called me.
    技巧3.当句中谓语是除情态动词、助动词、系动词was, were以外的动词时,在该动词之前加did not / didn't,动词还原,构成否定句。例如:
    The famous singer sang some Chinese songs. → The famous singer did not / didn't sing any Chinese songs.

    二变:陈述句变为一般疑问句
    技巧1.移动词语的位置。将was,were, could,would,should等移到句首。例如:
    He could pack his things himself. → Could he pack his things himself?
    技巧2.添加助动词did。谓语是除情态动词、助动词、系动词was, were以外的动词时,在主语之前加did,动词还原。例如:
    Mr Li looked very old. → Did Mr Li look very old?

    三变:陈述句变为特殊疑问句
    技巧1.确定疑问词:人who / whom,物what,地点where,时间when / what time,原因why,频率how often,长度how long,距离how far等等。例如:
    They gave the concert last night. → When did they give the concert?
    技巧2.辨认结构形式:疑问词+情态动词/助动词/ was / were / did +主语+...? 例如:
    The accident happened near the station. → Where did the accident happen?

  • 考点名称:主谓一致

    • 英语中的一致主要包括主语和谓语在人称和数上的一致、时态一致、名词和其代词的一致。
      主语和谓语保持一致叫主谓一致,即谓语动词的形式必须随着主语单、复数形式的变化而变化。

    • 主谓一致原则:
      1、语法上的一致
      所谓语法一致原则,即主语和谓语的语法形式在人称和数上取得一致。
      谓语的单、复数形式依据主语的单、复数形式而定:主语为复数,谓语动词用复数;主语为单数或者是不可数名词,谓语动词用单数。
      China belongs to the Third World. 中国属于第三世界。
      We are sure he will come. 我们肯定他会来。
      使用语法一致的情况
      (1)当主语是and,both…and连接的并列结构
      如果主语指的是两个或两个以上的人或物,则谓语动词用复数。
      My mother and I have seen the film. 我妈妈和我已看过这部电影。
      Both rice and wheat are grown in this part of China. 在中国的这个地方既种稻子又种小麦。
      注意:由and连接的并列主语前面分别有each,every,no修饰时,其谓语动词用单数形式。
      Every boy and every girl has to receive education in our country. 在我国每一个男女孩子都得受教育
      No student and no teacher was invited to the party. 师生没有被邀请参加晚会。
      (2)主语后面接说明主语的修饰语
      主语后面接说明主语的修饰语如:
      with,along with,together with,as well as,like,rather than,but,except,besides,including,in addition to,
      谓语动词不受修饰成分的影响,仍保持同主语一致的关系。
      The teacher with two students was at the meeting. 那位老师和两个学生参加了会议。
      The girl as well as the boys has learned to drive a car. 这个姑娘和男孩子一道,也学会了开汽车。
      A library with five thousand books is offered to the nation as a gift.一个有5000册书的图书馆作为礼物赠送给了国家。
      E-mail, as well as telephones, is playing an important part in daily communication.电邮和电话在日常的通信中起着很重要的作用。
      Nobody but Jane knows the secret.只有简知道这个秘密。
      All but one were here just now. 刚才除了一个人外都来了。
      (3)非谓语动词或从句作主语
      非谓语动词 (动词的-ing形式、不定式)或从句作主语时,谓语一般用单数形式。
      When and where to build the new factory is not decided yet.什么时候在什么地方建新工厂还没定下来。
      Checking information is very important. 核实事实是非常重要的。
      To learn foreign languages is not easy. 学习外语并非易事。
      When we will hold the meeting is not decided yet. 我们何时开会尚未决定。
      注意:当what引导主语从句或由 and连接两个动词不定式或动名词作主语时,谓语动词的数应根据意义一致的原则来决定。
      What we need here is money.我们这里需要的是资金。
      What we need here are workers.我们这里需要的是工人。
      Lying and stealing are immoral.说谎与偷窃是不道德的。
      (4)each和复合不定代词作主语
      each和some/any/no//every十body/one/thing构成的复合不定代词:
      anyone、anybody、anything、everyone、everybody、everything、someone、somebody、something、no one、nobody、nothing、each、the other作主语,谓语动词用单数。
      Each is worse than the one before. 一个比一个差。
      Nobody knows the answer. 没有一个人知道这答案。
      Someone wants to see you. 有人想见你。
      Is there anything in the box?箱子里有什么东西吗?
      There is a lot of milk in the bottle. 瓶子里有很多奶。
      (5)“many a +单数名词”作主语
      “many a、(很多)/more than one(不只一个)+单数名词”作主语时,谓语动词用单数形式。
      Many a student has been to Beijing. 很多学生去过北京。
      There is more than one answer to your question. 你的问题不只有一个答案。
      (6)“one of+复数名词十定语从句”之前有the等限定词和修饰语
      “one of+复数名词十定语从句”之前有the only,the very,the等限定词和修饰语时,定语从句的谓语动词用单数形式。
      Tom is the only one of those boys who is willing to help the old man.
      汤姆是唯一的一个愿意帮助那个老人的男孩。
      He is the only one of the students who has been a winner of scholarship for three years.他是这三年来唯一的一个获得奖学金的学生。
      注意:如没有这些限定词和修饰语,定语从句的谓语动词采用复数形式。
      Tom is one of the boys who are always ready to help others. 汤姆是个随时愿意帮助别人的男孩。
      (7)由两个部分组成的物体名词作主语
      英语中有些由两个部分组成的物体名称如g1asses(眼镜),scissors(剪刀),shorts(短裤),shoes(鞋子),trousers(裤子)等作主语,其后的谓语动词用复数形式。
      His glasses were broken, so he can't see well. 他的眼镜碎了,因而看不清楚。
      His trousers are made of cotton. 他的裤子是棉布的。
      注意:若这类名词前带有pair等表示单位的名词时,则以这些名词的单、复数形式决定动词的形式。
      Two pairs of trousers are missing. 两条裤子不见了。
      This pair of shoes is not on sale. 这双鞋不出售。

      2、意义上的一致
      意义上的一致是指谓语动词与主语的一致取决于主语所表达的意义。若主语形式上为复数,而意义上是单数,动词要用单数;
      若主语形式上为单数,而意义上为复数,则动词用复数。
      The United States is in North America. 美国在北美洲。
      The police are looking into the matter. 警察正在调查此事。
      使意义上的一致的情况
      (1)由and连接两个并列主语
      其后的谓语动词一般用复数形式。但如果两个单数名词指同一个人、同一事物、单一概念时,谓语动词要用单数,有时两个名词共用一个冠词。
      The worker and writer has written a new novel. 这位工人兼作家写了一部新小说。(两个名词共用一个冠词)
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