be of 结构
其用法很灵活,在句中可作表语、后置定语或宾补。
  一、“be of+ 表示年龄( age )、大小( size )、颜( 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 / the same age.
  这两个男孩同龄。
  二、“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 ofbe built ofbe 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。
  三、 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。
  四、“be of + 形容词最高级”,相当于 be one of .例如:
  His temper is of the quickest.
  他的脾气是最急躁的。
  Mr Liu is of the best teachers in our school.
  刘老师是我们学校最好的老师之一。
  五、“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 / very helpful 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 / very important.
  这个新闻发布会看来很重要。
一、“be of+抽象名词”,这时的of短语相当于这个名词的同根形容词,作为表语表示主语的性质或特征。of的意思是“具有、具备”等,常用于该结构的名词常见的有
of use=usefulof nouse=uselessof importance=important等。如:
The matter is of great importance.=The matter is very important.
在形容词前常用very来修饰,在“of+抽象名词”结构中,名词前常用great, much等来修饰。再如It is of great importance for college students to master a foreign language.
=It is 对大学生来说,掌握一门外语是很重要的。
二、“be of+集合名词或其它类型的名词”,相当于belong tohaveof表示归属关系或“有”的意思。如:The army and the people are of one family.
=The army and the people belong to one family.军民是一家。
三、“be of+物质名词”表示主语是“用某种材料构成或制作的”,相当于be made ofbe built of。如:Our building was of bricks.=Our building was built of bricks.
我们的楼房是砖建的。
四、be of+(表示种类、颜、年龄、形状、价格等)名词,多用来表示主语的特征。这类结构的主语可以是人,也可以是物,其中的of可以省略。常用于该结构的名词有:kind,age,colour,size,height,shape,type,way,price等。如:
Several of the stamps were of the unusual kind.其中几张邮票是不同种类的。
The two boys are of the same age.这两个男孩年龄相同。
She is of a different way of thinking.她的思维方式与众不同。
These two kinds of article are of the same price.这两种物品价格相同。
五、“be of+名词”也可以表示“来源、组成”。如:
He was of a poor peasant family.他出身贫农家庭。
The committee is of seven people.该委员会由7人组成。
六、“be of+形容词的最高级”相当于。如:
Mr.Wang is of the best teachers in our school.
=Mr Wang is one of the best teachers in our school.
王老师是我们学校里最好的老师之一。
worthworthyworthwhile的用法区别


这三个词都是形容词,都有值得的的意思,但用法或搭配关系不同。

1. worth是一个只能作表语的形容词,意思为……相当于……的价值的……价值的值得……。后接名词、接动名词的主动形式。例如:

This second-hand car is worth $2000 at the most.

The exhibition is worth a visit/visiting.

It’s not worth getting angry with him.

The question is not worth discussing again and again.

2. worthy可作表语,也可作定语。作定语时意思为有价值的值得尊敬的应受到赏识的;用作表语时意思为值得……应得到……,其后接of sth.,也可以后接to do sth.,例如:

That is worthy of note. 那件事值得注意。

This phenomenon is worthy of being studied. 这种现象值得研究。


This problem is worthy to be considered. 这个问题值得考虑。

The film is worthy to be seen again. 这部电影值得再看一遍。

This is a worthy English-Chinese dictionary. 这是一本有价值的英汉词典。

This is a worthy article. 这是一篇值得一看的文章。

He said he was not worthy to accept such honour

The school has educated many worthy young people.

The question is not worthy to be discussed again and again.

作后置定语时,必须用“worthy of +名词结构。例如:

There is nothing worthy of mention. 没有值得一提的事情。

This is behavior worthy of praise. 这是值得称赞的行为。

Something find and rare --- something worthy of the honor of being owned by Jim.

(S3 Unit 10 P84)

注:“worthy of+动名词“worth+动名词在形式上完全不同:worthy of后面接被动式的动名词;而worth后面接主动式的动名词,虽然在形式上是主动的,但其意义仍然是被动的。试比较:

The second-hand house is worthy of being bought. = The second-hand house is worth buyi
ng.


3. worthwhileworthyweight的最高级一样,既可作表语,又可作定语。表示某事因重要、有趣或受益大而值得花时间、金钱或努力去做,一般做值得的值得做的有意义的解。用作表语时,可接动名词或动词不定式。例如:

The Summer Palace is worthwhile going / to go to have a visit.

Helping old people is a worthwhile activity.

Thank you for your worthwhile suggestion.

I really feel I am doing something worthwhile and I am having a great time doing it.