简论从句缜密思维试述试述高效掌握定语以句科技

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定语从句(Attributive Clauses)是高一的学习重点和难点。我运用“六步法”教定语从句,要求学生科学思维,学习效果非常好。
第一步:三个概念

1、先行词:被修饰的名词、名词词组或代词即先行词。

2、关系词(关系代词或关系副词):找出先行词与定语从句关系的词。关系代词有:who,whom,whose,that,which等;关系副词有:when,where,why等。

3、定语从句:在句中做定语,修饰一个名词或代词。

三者的位置关系如下:先行词、关系词、定语从句。
第二步:三种规定
关系代词所代替的先行词是人或物的名词或代词,并在句中充当主语、宾语、定语等成分。学习定语从句的关键是要找出这种方法:将先行词代入定语从句中,分析其作什么成分。关系代词在定语从句中作主语时,从句谓语动词的人称和数要和先行词保持一致。
第三步:介词宾语
作介词宾语的关系代词有whom,whose,which等。说明:⑴介词后面的关系词不能省略。⑵that前不能有介词。如:
There are occasions on which one must yield.(任何人都有不得不屈服的时候。)
Beijing is the place in which I 摘自:毕业论文摘要www.618jyw.com
was born.(北京是我的出生地。)
关系副词可代替的先行词是时间、地点或理由的名词,在从句中作状语。如:
There are occasions when (on which) one must yield.(任何人都有不得不屈服的时候。)
Beijing is the place where (in which) I was born.(北京是我的出生地。)
第四步:关系副词

1、when,where,why

关系副词when,where,why的含义相当于“介词+which”结构,因此常常和“介词+which”结构交替使用。如:Is this the reason why (for which) he refused our offer?(这就是他拒绝我们帮助他的理由吗?)

2、that代替关系副词

that可以用于表示时间、地点、方式、理由的名词后取代when,where,why和“介词+which”引导的定语从句,that在口语中常被省略,例如:
His father died the year (that/when/in which) he was born.(他父亲在他出生那年逝世了。)
He is unlikely to find the place (that/where/in which) he lived forty years ago.(他不大可能找到他四十年前居住过的地方。)
第五步:限制性和非限制性定语从句
定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分,去掉它主句意思往往不明确;非限制性定语从句是先行词的附加说明,去掉了也不会影响主句的意思,它与主句之间通常用逗号分开。例如:
This is the house which we bought last month.(这是我们上个月买的那幢房子。)(限制性)
The house, which we bought last month, is very nice.(这幢房子很漂亮,是我们上个月买的。)(非限制性)
当先行词是专有名词或物主代词和指示代词所修饰时,其后的定语从句通常是非限制性的。例如:
Charles Smith,who was my former teacher, retired last year.(查理·史密斯去年退休了,他曾经是我的老师。)
My house,which I bought last year, has got a lovely garden.(我去年买的的那幢房子带着个漂亮的花园。)
This novel,which I he read three times, is very touching.(这本小说很动人,我已经读了三遍。)
非限制性定语从句还能将整个主句作为先行词,对其进行修饰,这时从句谓语动词要用第三人称单数。例如:
He seems not to he grasped what I meant,which greatly upsets me.(他似乎没抓住我的意思,这使我心烦。)
Liquid water changes to vapor,which is called evaporation.(液态水变为蒸汽,这就叫做蒸发。)
说明:关系代词that和关系副词why不能引导非限制性定语从句。
第六步:特殊句型

1、成分残缺

例句:
Is this factory the one that you visited last year?
This is the factory that? you visited last year.

2、from+关系副词where等

例句:
He stood beside the window,from where he could see what happened outside.
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