be of 结构与介词宾语从句
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be of 结构与介词宾语从句
一、“ (be)+of+名词”用法
请看课本中的句子:
Freedom fighters can be found everywhere, and they are of all times.(Unit 14)
自由战士在各个地区,各个时期都存在。
该句的后半句,采用了be of接名词来说明句子的主语所具有的性质或特征。这是一种很常用的句式。
be of 后可接两种不同性质和类型的名词,他们的意义大相径庭区别明显相差很远。1,
be of 后可接value, importance, use, help, significance, interest, benefit 等一些抽象名词,这样的结构用来说明句子主语所具有的作用、重要性或意义。在这类抽象名词前我们可用一些形容词,如: great, little, some, any, no, not much等来修饰抽象名词,用以说明程度。
“be of+ 抽象名词(value,importance,use,help,interest 等)”相当于“be + 该抽象名词相对应的形容词”。其中of 表示“具备;具有”,of 不可以省略。例如:
They are of great help to learners of English.
他们对英语学习者来说是很有帮助的。
The press conference seems of great importance.
这个新闻发布会看来很重要。
I don't want to hear what you are saying. It is of no interest to me. 我不想听你说,我对此不感兴趣。(of no interest=not interesting)
Doing morning exercises will be of benefit to your health.
做早操对你的健康有利。
Coal is of great importance to the development of industry.
煤对工业发展是相当重要的。(of great importance=very important)
The book will be of great value to students of history.
这本书对学历史的学生将很有用。
The meeting is of great importance.
这个会议很重要。
This medicine is of no use.
这种药无效。
This matter is of no significance.
这件事无关紧要。
在“be of + 抽象名词”结构中,其意义就相当于“be + 与该抽象名词同词根的形容词”。如:be of value→be valuable,be of help→be helpful,be of use→be useful, be of importance→be important,be of significance→be significant等。它们之间可以相互转换,因此,以上各例句可转换为:
They are very helpful to learners of English.
This book is very valuable to students of history.
This meeting is very important.
This medicine is useless.
This matter is insignificant.
2. be of +名词,还可用来说明句子主语在度量,大小,颜色,类别等方面的特征。这类名词有colour, age, size, height, weight, shape, type,kind等。在这类名词前常用different,
all, the same,this, that, a(n) + 形容词等词来修饰或说明。
“be of+ 表示年龄(age )、大小(size )、颜色(color )、重量(weight )、高度(height )、价格(price )、意见(opinion )、形状shape )种类kind )(、(和方法way )(等的名词” 表示,“具有……” ,说明主语的特征。例如:
When I was of your age,I entered the war.
当我是你这个年龄的时候,我就去打仗了。
These flowers are of different colors.这些花的颜色都不同。
注意:在此结构中,如果后面的名词前有不定冠词 a / an ,则这个冠词相当于the same .例如:
The two boys are of an age.
The two boys are of the same age.
这两个男孩同龄。
The two rooms are of a size .
The two rooms are of the same size.
这两个房间大小一样。
Coins may be of different sizes, weights, shapes, and of different metals.
硬币可能在大小、重量、形状和铸造的金属方面都有所不同。
These pens are of many different colours.
这些笔有许多不同的颜色。
He is of the same weight as his brother.
他和他弟弟一样重。
注意:此类句型中的某些表达可以转换成
“be + different +in + 抽象名词” 的形式。
“be + the same + in + 抽象名词” 的形式。如:
Coins may be different in size, weight, shape, and metal.
These pens are different in colour.
The two rooms are the same in size.
The productive forces were of a very low level.
生产力处于非常低的水平。
City Lights and Modern Times were of this kind.
“城市之光”和“摩登时代”就是这种影片。
3、be of 还可以表示所属关系,相当于belong to .例如:
China and India are of the third world. 中国与印度同属于第三世界。Workers and peasants are of one family. 工人和农民是一家。
4、“be of + 物质名词”,表示主语是由某种材料制成或由某种成分构成,相当于be made of,be built of,be made up of 等。例如:
The necklace is (made)of glass. 这条项链是由玻璃制成的。Our class is (made up)of over 50 students. 我们班有50 多个学生。