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  4. 情态动词从属连词

— Linda ______ ride a bike ______ she was only five.— Yes, but she can now. [ ]A. could; when B. cou

一、题文

— Linda ______ ride a bike ______ she was only five.
— Yes, but she can now.

[     ]

A. could; when
B. couldn't; when
C. can; because
D. can't; because

考点提示:情态动词,从属连词

二、答案

B

三、考点梳理

知名教师分析,《— Linda ______ ride a bike ______ she was only five.— Yes, but she can now. [ ]A. could; when B. cou》这道题主要考你对 情态动词从属连词 等知识点的理解。

关于这些知识点的“解析掌握知识”如下:

知识点名称:情态动词,从属连词

考点名称:情态动词
  • 情态动词:
    是一种本身有一定的词义,表示说话人的情绪、态度或与语气的动词,但不能单独作谓语,只能和其他动词原形构成谓语。
    无人称和数的变化,情态动词后面跟的动词需用原形,否定式构成是在情态动词后面加 “not”。
    个别情态动词有现在式和过去式两种形式,过去式用来表达更加客气,委婉的语气, 时态性不强,可用于过去,现在或将来。情态动词属非及物动词,故没有被动语态。
    情态动词有四类:    
    ①只做情态动词:must, can(could),may(might)……    
    ②可做情态动词又可做实义动词:need, dare   
    ③具有情态动词特征:have(had, has) to, used to    
    ④情态动词表猜测
    注:mustn't代表强烈禁止 must表示主观,have to表示客观。
    常用的有:can  may  could  must   have  use  .
  • 情态动词特点:
    情态动词无人称和数的变化,情态动词后面跟的动词须用原形,否定式构成是在情态动词后面加 "not"。
    个别情态动词有现在式和过去式两种形式,过去式用来表达更加客气,委婉的语气,时态性不强,可用于过去,现在或将来。情态动词属非及物动词,故没有被动语态。
    He could be here soon.他很快就来。
    We can't carry the heavy box.我们搬不动那箱子。
    I'm sorry I can't help you.对不起,我帮不上你。

    基本助动词与情态助动词最主要的区别之一是:
    基本助动词本身没有词义,而情态助动词则有自己的词义,能表示说话人对有关动作或状态的看法,或表示主观设想:
    What have you been doing since? (构成完成进行体,本身无词义)
    I am afraid I must be going. (一定要)
    You may have read some account of the matter. (或许已经)

    除此之外,情态助动词还有如下词法和句法特征:
    1) 除ought和used以外,其他情态动词后面只能接不带to的不定式。如果我们把ought to和used to看做是固定词组的话,那么,所有情态动词无一例外地只能接不带to的不定式:
    We used to grow beautiful roses.我们过去常常种这种漂亮的玫瑰花
    I asked if he would come and repair my television set.我问他是否来修我的电视机
    2) 情态助动词在限定动词词组总是位居第一:
    They need not have been punished so severely.
    3) 情态助动词用于第三人称单数现在时的时候,没有词形变化,即其词尾无-s形式:
    She dare not say what she thinks.
    4) 情态动词没有非限定形式,即没有不定式和分词形式,也没有相应的动名词:
    Still,she needn't have run away.
    5)情态助动词的“时”的形式并不是时间区别的主要标志。在不少场合,情态助动词的现在时和过去时形式都可以表示现在、过去或将来时间:
    Would you mind very much if I ask you to do something?
    She told him he ought not to have done it.
    6) 情态助动词之间是相互排斥的,即在一个限定动词词组中只能出现一个情态助动词,但有时却可以与have和be基本助动词连用:
    You should have washed the wound.
    Well,you shouldn't be reading a novel.
    7)情态动词must一般疑问句否定回答用needn't
    Must I read books every day、
    No,you needn't

  • 常见情态动词用法:
    1.can (could) 表示说话人能,可以,同意,准许,以及客观条件许可,could 为 can 的过去式。
    2.Must 必须,应该,一定,准是,表示说话人认为有必要做某事,命令,要求别人做某事以及对事物的推测。
    must 用来指一般现在时和一般将来时, 过去式可用 have to 的过去式代替。
    must + have + 过去分词,表示现在对过去事物的推测。
    must 和 have to 的区别:must 表示说话人的主观思想,have to 表示客观需要。
    3.need 是一个情态动词,他的用法完全和其他情态动词一样,但 need 还可当作实义动词使用,这时 need 就象其他动词一样,有第三人称,单复数, 后面加带 to 的动词等特性。
    needn't + have + 过去分词 表示过去做了没必要做的事情。
    4.dare 除用作情态动词外,更多的是当实义动词使用, 用法同实义动词一样,要考虑人称,单复数,时态等。
    5.ought 应当,应该。后面跟带有 to 的动词不定式。
    ought + to have done 句型。指过去动作,表示一件事情该做而未做。
    ought not to have done 句型。表示一件不该做的事情却做了。
    6.will (would)决心,愿望。 would 为 will 的过去式,
    will, would用于疑问句表示说话人向对方提出请求或询问,用 would 比 will 更婉转,客气。
    7.Shall、should 表示命令,警告,允诺,征求,劝告,建议,惊奇。
    8.have to,不得不,必须,表示客观条件只能如此,而must 则表示主观思想。

  • 情态动词功能:
    助动词主要有两类:基本助动词和情态助动词。
    基本助动词有三个:do,have和be;
    情态助动词基本的有十四个:may, might; can, could; will, would; shall, should; must, need, dare, used to, ought to.had better 上述两类助动词的共同特征是,在协助主动词构成限定动词词组时,具有作用词的功能:
    1) 构成否定式:
    He didn't go and neither did she.
    The meeting might not start until 5 o'clock.
    2) 构成疑问式或附加疑问式:
    Must you leave right now?
    You have been learning French for 5 years, haven't you?
    3) 构成修辞倒装:
    Nowhere can he obtain any information about his sister.
    Hardly had he arrived when she started complaining.
    4) 代替限定动词词组:
    A: Who can solve this crossword puzzle?
    B: Tom can.
    A: Shall I write to him?
    B: Yes, do.

    情态动词表推测的用法小结   
    (一)情态动词表推测的三种句式    
    1.在肯定句中一般用must (一定),may(可能),might /can, could(也许,或许)。   
    (1)He must/may/might know the answer to this question?    
              他一定/可能/也许知道这个问题的答案。   
    (2)It is cold in the room. They must have turned off the heating.   
              屋里很冷,他们肯定把暖气关了。    
    2. 否定句中用can’t / couldn’t(不可能), may not/might not (可能不)。   
    (1)It can’t/couldn’t be the headmaster. He has gone to America.  这不可能是校长,他去美国了。   
    (2)He may not/might not know the scientist. 他也许不认识那位科学家。   
    3. 疑问句中用can/could (能……?)。    
     (1)Could he have finished the task? 他可能把任务完成了吗?    
     (2)Can he be at home now?  他现在能在家吗?   
    注:以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非may, can的过去式,而表示语气较为委婉或可能性较小。   

    (二)情态动词表推测的三种时态   
    1. 对将来情况的推测,用“情态动词 + 动词原形”。    
    (1)She must / may / might / could arrive before 5.  5: 00 前她一定/可能/也许到。    
    (2)She must/may/might/could walk miles and miles among the hills without meeting anyone.   
               她一定/可能/也许会在山里一连走好几英里而遇不到一个人。   
    2. 对现在或一般情况的推测,用“情态动词 + be”,“情态动词 +be doing”或 “情态动词 + 动词原形”。    
    (1)He must / may / might / could be listening to the radio now. 他一定/可能/也许正在听收音机。   
    (2)He can’t ( couldn’t ) / may ( might ) not be at home at this time. 这个时候他不可能/可能不在家。   
    (3)Mr. Bush is on time for everything .How can ( could ) he be late for the opening ceremony ?   
              布什先生一向准时,这次开幕式他怎么可能迟到呢?    
    3.对过去情况的推测,用“情态动词 + have +过去分词”。   
    (1)It must / may / might / could have rained last night .The ground is wet.  地湿了,昨晚肯定/可能/也许下雨了。   
    (2)The door was locked. He can ( could ) not / may ( might ) not have been at home . 门锁着,他不可能/可能不在家。   
    (3)Can / Could he have gotten the book? 难道他找到书了吗?    
    注:情态动词 should /ought to表推测时,意为“想必会,理应……”但与“have +过去 分词”连用时,则又可构成虚拟语气意为“本应该做某事却没做”。 
    例如:   
    (4)It’s seven o’clock. Jack should/ought to be here at any moment.   
         现在七点钟了,杰克理应随时到达。(推测)   
    (5)She should / ought to have attended your birthday party, but she had to look  after her mother in hospital. (虚拟)   
    她本该出席你的生日晚会的,可是她得在医院照顾她妈妈。   
    (6)Tom should not /ought not to have told me your secret, but he meant no harm.   (虚拟)   
    汤姆本不该告诉我你的秘密,可是他并无恶意。
考点名称:从属连词
  • 从属连词:
    这种连词是用以引导名词性从句定语从句和状语从句的,由从属连词所引导的句子叫从句,而含有从句的句子叫作复合句。
  • 从属连词可分为三大类:
    1、that (无词义,不做成分)
    if,whether (表达是否的意义,但不做句子成分)
    2、连接代词:who,whom,whose,what,which,whatever, whoever, whichever(有词义,在句子中可作主语、表语、宾语)
    3、连接副词:when,where,why,how,how many,how long,how far,however,whenever,wherever (有词义,作从句的状语)

    用法:
    从结构上说,英语连接词分两大类:并列连词和从属连词。

    并列连词连接两个或两个以上地位平等的字、词组或分句。例如:
    (1) Air and water are indispensable to me.   
    (2) She likes going out with friends or playing outdoor games.   
    (3) Most workers have a good income, so they look very happy.   

    从属连词连接两个或两个以上的分句,形成复杂句中的从属分句。例如:   
    (4) He said that he did not want to go .   
    (5) Many things have happened since I last saw him.   
    (6) You may come if you want to.   

    从属连词用来连接各种从句。
    until(till)直到,在用until表达时间状语的句子中,主句中的动词是要十分小心去选择的。
    如动词是持续行动词,它要用肯定句,如:
    I studied hard until 12 o'clock last night.
    如果动词是瞬间截止性动词,则要用否定句,如:
    He didn't go to bed until his mother came back.
    由since,for,by,before, 来引导的时间状语从句。
    since 引导的时间状语是动作的开始时间,如:
    I have studied English since 1990.
    而by引导的时间状语通常是动作的结束时间,如:
    I had learned 25 English songs by the end of last term.

  • 从属连词语法分类:
    种类语法作用连词举例 
    从属连词引导原因状语从句Because, since
    引导条件状语从句If, unless, as long as
    引导目的状语从句So that
    引导结果状语从句So…that
    引导方式状语从句As, just as, as if
    引导让步状语从句Though, although, even
    though, no matter what,
    however, no matter how,
    whoever, no matter who,
    wherever, no matter where
    引导比较状语从句As…as, not so…as, than,
    less…than, the more…the
    more
    引导名词性从句Who, whom, whose, which,
    that, when, where, why

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