职称英语常用语法详解第二讲:五个基本句型

来源:微学网发布时间:2011-04-28

  二. 五个基本句型
  根据动词的特性,构成英语中五个基本句型:
  1) 主语 + 系动词 + 表语
  2) 主语 + 不及物动词 (+ 其他成分)
  3) 主语 + 及物动词 + 宾语
  4) 主语 + 及物动词 + 双宾语
  5) 主语 + 及物动词 + 宾语 + 宾语补足语
  我们在学习5个基本句型时,主要关心每个句型中的出题点在哪里。
  (一)第一句型:主语 + 系动词 + 表语
  1) 系动词一般为be 动词。
  注意:look, feel, sound, smell, taste, get, become, come, go, turn, grow, keep, seem, stand等词可以作"半系动词"用,按行为动词方式变化,起系动词的作用。
  试验比较:
  —— He felt the pockets thoroughly but did not find a single penny.(他摸遍了口袋但没有找到一分钱。—— feel为行为动词)
  —— You look pale. Do you feel unwell? (你脸色苍白,感到不舒服?—— look / feel为系动词)
 一般来说,动词后面跟的是个形容词或名词,该动词为系动词, 如:The plan sounds perfect. / The flower smells nice. / The dish tastes delicious. / It is getting dark.
  实例:
  "Don't worry. Let me take your pulse first." "Oh, it ______ normal." (脉搏正常)
  A. is felt
  B. is feeling
  C. feels
  D. felt
  解题思路:normal为形容词,前面应为系动词;系动词没有被动语态,故A不对; look, feel, sound, taste, smell, seem等半系动词一般不用进行时,B也不对;D时态错了,故正确答案为C.
  2)there be是英语中非常重要的一个句型: there是引导词,不解释 "那里"; 这是个倒装句, 主语在be动词的后面, be动词的单复数由后面的主语决定。
  注意中国学生容易搞错的问题:
  There isn't enough furniture in the room.(房间里家具不够)
  错:There hasn't enough furniture in the room.
  There is no doubt that smallpox has been wiped out in China.(毫无疑问,中国已消灭天花。)
  错:It is no doubt that smallpox has been wiped out in China.
  There is ample evidence that AIDS is spreading quickly in Asia. (充分证据表明,爱滋病正在亚洲迅速蔓延。—— 同位语从句)
  错:It is evidence that AIDS is spreading quickly in Asia. (可以: It is evident that AIDS is spreading quickly in Asia. - 主语从句)  
  (二)第二句型:主语 + 不及物动词 (+ 其他成分)
  在这个句型中主要注意及物动词与不及物动词的区分:
  不及物动词 及物动词
  rise /rose / risen(升起) raise /raised / raised (提高)
  arise / arose / arisen (from)(产生) arouse / aroused / aroused(唤起)
  lie / lay / lain(躺下) lay / laid / laid(放下)
  arrive at(到达) reach(到达)
  wait for(等待) await(等待)
  remain(仍旧) maintain(保持,维修)
  *上面所注仅为典型词义,要根据句子判别其他意思。
  此外,该句型常采用倒装形式,注意辨别,主要是以下两种情况:
  1) 用here 或 there引导:Here comes the bus. (汽车来了。) / There rings the bell. (铃响了。)
  2) 在动词 + 介词短语的结构中,往往将介词短语提前:On the top of the hill stands a pretty little house.(山顶上有一座漂亮的小房子。)
  (三)第三句型:主语 + 及物动词 + 宾语
  我们知道,名词可以做主语和宾语,非谓语动词 -ing和 to do也可以做主语和宾语,
  作主语:
  Learning a foreign language is not easy.(学门外语并不容易。)
  To learn a foreign language is not easy. (= It is not easy to learn a foreign language.)
  从语法角度讲,上述两个表达方式都可以。
  但是,当动词处于宾语位置时,就不能这样"随心所欲"了,因为英语语法有以下几个规定:
  1)acknowledge / admit / appreciate / avoid / consider / contemplate / defer / deny / dislike / enjoy / escape / evade / excuse / facilitate / fancy / favor / feel like / finish / give up / cannot help / cannot stand / imagine / include / keep (on) / do not mind / miss / permit / practice / regret / resent / risk / suggest 等词后面的动词宾语必须用-ing 形式,重点和首先要掌握黑体字部分。由于这些次的词义与解题关系不大,没有给出具体词义解释。若需要,请学生自己查字典解决。
  这是语法考试的一个重点,要对以上词特别敏感,例如:
  It is impossible to avoid ______ by the stormy weather.
  A. being much affected
  B. having much affected
  C. to be much affected
  D. to have been much affected
  解题思路:1)一看到avoid一词,便可确定正确答案在A、B中; 2)affect意为"影响",及物动词,故B不对。[如果做题时间来不及,此类题目若有"主动语态"和"被动语态"之分,一般选"被动语态"的正确率高些。]
  2) remember / forget:后面既可跟 -ing, 也可跟 to do,但意思不一样:to do表示说话时还没有发生的事,-ing表示对已经发生过事的回忆,如:"我昨天出门时忘了关窗了。"显然是指出门时还没有做的事,因此用to do形式;"我不记得以前见过你。"显然是指说话以前的事,因此用 -ing形式,即:
  I forgot to close the windows when I left home yesterday.
  I don't remember seeing you before.
  因此,除了知道这个规定外,分清"发生过"还是"没有发生"是解题的关键。
  实例:
  Do you remember ______ to Professor Smith during your last visit?
  A. to have been introduced
  B. having introduced
  C. being introduced
  D. to be introduced
  解题思路:1)第一步要确定"发生过"还是"没有发生",即A、D还是B、C,"你记得上次访问时被介绍给Smith教授的情况吗?"显然是已发生的事,选B、C;2)"introduce"(介绍)后没有宾语,说明是"被动语态:,故选C [再看一下上一节中的 "解题思路"]
  3)need / want / require等解释为"需要"时,有两种表达方式,如:
  "这间会客室需要打扫一下"
  A.This waiting room needs to be cleaned. (to 被动式)
  B.This waiting room needs cleaning.(-ing主动式)
  考试时若同时出现两种选择,选B
  4)look forward to / object to / subject to / be subjected to / be opposed to / oppose to中的 "to" 是介词,后面应跟名词或动名词-ing,
  (四)第四句型:主语 + 及物动词 + 双宾语
  有些动词(主要是"授予动词")后面需要或可以接双宾语结构,如:give, write, buy, send, make等
  You may send him an E-mail or write him a letter.
  这个句子也可使用以下结构:
  You may send an E-mail (to him) or write a letter to him. 所以 "to" 和 "for" 是连接双宾语结构的重要介词。
  该句型的重点是要记住以下短语,特别是所用的介词:
  to cure … of(治愈…)
  to accuse …of(谴责…)
  to convince… of(说服…)
  to inform… of(通知…)
  to notify… of (通知…)
  to clean… of (清除…)
  to warn…… of / against (警告…)
  to cheat… of(欺骗)
  to rob… of(抢劫…)
  例如:
  We have to inform the family of the patient's condition as soon as possible. / Have the family been informed of the patient's condition? (我们得尽快将病人的病情通知其家属。/ 已经将病人的病情通知其家人了吗?)
  注意下面句子的结构变化:
  May I ask you a question? → May I ask a question of you?
  直接和间接宾语的位置与上面短语有何不同?
  (五)第五句型:主语 + 及物动词 + 宾语 + 宾语补足语
  先回顾一下本讲第一节中有关宾语和宾语补足语的概念。
  这个句型也是考试的重点,主要有三个难点:
  1) 要不要 "to"的问题:
  The director wants you to come right now. (主任要你马上就来。)
  句中to come 是宾语you的补足语。也就是说,当宾语补足语是动词时,一般要用 "to"连接。但是,以下情况例外:
  n make, let, have等使役动词,如:
  Shall I have him come here?(要我叫他来吗?)
  I won't have him cheat me. (否定式,表示"容许":我决不容许他欺骗我)
  上述句型变为被动语态时,一般要加 "to",如:
  The nurse made the patient eat something. (护士让病人吃了点东西。)
  →The patient was made to eat something.
  有时,宾语补足语也可用 -ing形式,如:
  His joke made us laughing for a couple of minutes. (他的笑话使我们笑了几分钟。- 注意后面的时间状语for a couple of minutes)
  记住下面重要表达方式:
  to have / get (something) done, 如:
  I am going to have (get) my watch repaired.(我去修一下表。)
  n see, hear, notice, observe, watch, look at, listen to 等感觉动词:
  使用原则与上述大致相同。
  2) 要不要 "it"的问题:
  先看两个句子:
  We sometimes find it difficult to get rid of a bad habit. (有时我们发现要改掉一个坏习惯很难。)该句的原始结构可理解为:We sometimes find (to get rid of a bad habit) difficult. 括号部分(动词不定式)为宾语,difficult为宾语补足语
  The doctor has made it clear to you that there is nothing wrong with your stomach.(医生已经跟你说得很清楚了,你的胃没有什么问题。)该句的原始结构可理解为:The doctor has made (there is nothing wrong with your stomach)clear. 括号部分(句子) 为宾语,clear为宾语补足语
  归纳:
  n 在主语 + 宾语 + 宾语补足语结构中,当宾语是"动词不定式"或"句子"时,要用it(不是this, that或其他任何词)作形式宾语,将动词不定式或句子移到句子的后面去。
  n 考试时,判断要不要 "it",主要看句子后面有没有"动词不定式"或"句子",若有,要选 "it"
  n 宾语、宾语补足语倒装:当宾语(名词)较长,宾语补足语较短(往往是1个形容词,如possible, impossible, difficult, easy, clear等)时,为了句子结构均衡,往往采用倒装,这里不存在"it"的使用问题, 对下句作出判断:
  The development of ultrasound has made ______ early diagnosis of some fatal diseases. (超声波的出现使许多致命疾病的早期诊断成为可能。)
  A. it possible
  B. possible
  C. it is
  D. it
  该题的正确答案应为B,因为句子采用了倒装形式,原结构为:
  The development of ultrasound has made [early diagnosis of some fatal diseases] possible.
  宾语 补足语
  3) 记住以下短语:
  to take…as(把…当作…)
  to think of…as(把…看作…)
  to regard…as(把…看作…)
  to refer to…as(把…叫作…)
  关于五个基本句型,重点要掌握每个句型的出题点,举一反三。