新概念英语第二册第49课课文详解及语法解析

2018-11-29 16:53:00来源:网络

  语法 Grammar in use

  复合句的语序 (Word order in complex statements)

  复合句的构成方法可以是把简单句连接在一起。但与并列句不同,它的各个组成部分并非同等重要,其中总有一个独立分句(或称“主句”)和一个或一个以上 从属分句(或称“从句”),主句往往可以独立存在。复合句可用两种方法构成。一是用连词把从句与主句连接起来;二是用分词结构或不定式,它们构成复合句的 一部分,因为它们可以用从句的形式表现出来。

  (1)用连词连接的复合句

  A 在复合句中,从句可以是名词从句(即起名词的作用)。在句子中,它可以作主语、宾语或be等系动词的表语,一般由that引导,有时也用what(疑问词引导的除外):

  I know(that)the meeting will be put off.

  我知道会议将要推迟。(宾语)

  That the meeting will be put off is now certain.

  会议将被推迟现已确定无疑。(主语,that不可省略)

  B 也可以是关系(或形容词)从句,关系代词通常有who, whom, that, which和whose。(cf.第28课语法)

  C 也可以是状语(或副词)从句。时间状语从句一般回答When?形式的问题,并可以用下列从属连词来引导:when, after, before, as soon as, until, while, as, since等:

  He has been ill since he came back from his holidays.

  他自从休假回来就一直病着。

  地点状语从句回答Where?形式的问题,可以由where, everywhere, anywhere等连词来引导:

  With a special train ticket, you can travel anywhere/ everywhere you like in Europe for just over £ 100.

  你如持有专票,仅花一百多一点英镑,就可以到欧洲各地旅行。

  方式状语从句回答How?形式的问题,可以由连词as或短语in the way(that)等引导。方式状语从句一般置于主句之后:

  Type this again as/in the way(that) I showed you just now.

  按我刚才告诉你的那样把这再打一遍。

  方式状语从句在动词be, feel, seem, appear等后面也可以由连词as if和as though来引导:

  It feels as if/ though it's going to rain.

  这天气给人的感觉好像是就要下雨了。

  原因状语从句一般回答Why?形式的问题,可以由because, as 等引导:

  He went to bed earlier than usual because he was tired.

  他因为累了,所以睡觉比平时早。

  As you can't go yourself, you'll have to ask Susan go to for you.

  既然你自己不能去,那你就请苏珊替你去吧。

  条件状语从句可由if及其他连词引导。(cf.第16课与第40课语法)让步状语从句使句子具有对比的因素,它们一般由连词although, though, even though, even if等引导:

  He failed the exam, even though he studied hard.

  虽然他学习很努力,他考试还是没及格。

  Although he studied hard, he failed the exam.

  (译文同上)

  目的状语从句可由so that, in order that等连词引导:

  I arrived early so that/ in order that I could get the tickets.

  我到得很早,以便能买到票。

  结果状语从句描述结果,可由so+形容词+that引导,也可由such(a)+(形容词)+名词+that来引导:

  She was so angry that she left immediately.

  她非常生气,立刻就走了。

  There was such a lot of rain that we couldn't go out.

  下这么大的雨,我们都出不了门了。

  比较状语从句结构包括as+形容词/副词+as, not so/as…as,形容词/副词的比较级+than, more…than, less…than 等:

  He is as quick in answering as his sister(is).

  他回答得和他妹妹/姐姐一样快。

  He is not so/ as quick in answering as his sister(is).

  他回答得不如他妹妹/姐姐那样快。

  He moves more slowly than his sister(does).

  他行动起来比他妹妹/姐姐慢。

  (2)分词结构的复合句

  A 用现在分词结构可以代替时间从句、原因从句、关系从句等:

  I got very angry speaking to them.

  和他们谈话时我变得非常生气。(时间)

  Feeling tired, I went to bed earlier than usual.

  我觉得很累,所以睡得比平时早。(原因)

  The train arriving at 8 o'clock is from London.

  8点钟到的这趟列车是从伦敦来的。(代替关系从句)

  现在分词结构的这种用法仅限于两个动作的主语一致的时候。用它代替时间从句时,分词结构表示的动作如果发生在前,则分词结构要位于主语前;如果两个动作同时发生,那么分词结构既可以位于主句前,也可以位于主句后:

  Finding the door unlocked, he went into the room.

  他发现门没上锁,就走进房间。(有前后)

  Working with them, I got very angry.

  同他们一起工作时我很生气。(同时)

  分词结构位于主句前面时,要用逗号隔开。

  B 过去分词结构常用于比较正式的文体,往往代替被动语态:

  Damaged in an accident, the car has now been repaired.

  在一次事故中被撞坏后,那辆车现已修好。

  (3)不定式结构的复合句

  这种结构通常可以代替表示目的或表示条件的状语从句:

  To get into university you have to pass a number of examinations.

  要进入大学你必须通过一系列考试。

  I borrowed some money to get a new car.

  为了买辆新车,我借了些钱。

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