自学英语语法：比较等级的一些特殊用法

3.比较等级的一些特殊用法

3.1两种不同情势是自学英语语法知识点：

有几个形容词和副词的比拟级和最高级有两种的比较等级不同形式，而且意思也不同。
举例说明：
1)Rome is one of the oldest cities in the world. 罗马是世界上最古老的城市之一。
Her eldest daughter is a school teacher.她大女儿是个老师。
My elder brother is in college. He is two years older than I. 我哥哥在上大学，他比我大两岁。
[注]older，oldest说明人的年纪或事物的年代的久远，但在美国英语里也表示长幼。

2)They reached the place later than we.他们到达那儿比咱们晚。
Twenty years later he returned to his home village. 二十年后，他回到自己的故乡。

3)Who spoke last?是谁最后发言的?
What is the latest news about the sports meet?对运动会最近有什么消息? 内容来自

3.2 as...as；not so. . .as或not as...as

1)表示"相等"用as...as。自学英语语法如：
This knife is as sharp as that one.这把刀跟那把一样快。
Bill is as tall as I. 比尔跟我个别高。
Is this bag of soyabeans as heavy as that one?这袋大豆跟那袋一样重吗?
You know as well as I do.你跟我一样明白。

[注]自学英语语法留心as后面的形容词如作定语，而被定语修饰的名词有不定冠词a时，冠词a须放在形容词之后，如German is as difficult a language as English.(德语和英语一样难学。)。这样的词序也适用于so，如I have never seen so beautiful a place as Guilin before.(我从前从未见过像桂林这样美丽的地方。)

2)表示"不相等"用not so...as或not as...as。如：
Tian An Men Square was not so big as it is now.天安门广场从前不当初这样大。
The Atlantic Ocean is not as big as the Pacific ocean.大西洋不太平洋大。

3.3表现"多少倍于"的自学英语语法
用twice (两倍)，three times(三倍)等加as...as..
如：
New York is ten times as big as my home town.纽约有我的家乡十个大。
The output of the paper mill is now three times as high as it was in 1966.这家纸厂的生产比一九六六年增加两倍。
This river is twice as long as that one.这条河比那条河长一倍。
Asia is four times as large as Europe.亚洲比欧洲大三倍。

[注]表示"多少倍于"也可能用下面的说法，如：