形容词比较级
如果我们要翻译〝他比较老〞，我们不能说
＊ He is more old.
而一定要说
He is older.
为什么呢？这是因为英文里面的形容词有所谓的比较级规则。

在下一节，我们讲一些最基本的规则。

1 最基本的规则
首先，我们要说明英文形容词有三个等级：原级、比较级和最高级，最基本的规则是根据音节的多少来分的。

一般来说，单音节的形容词在字后面加er，就变成了比较级，加est就变成了最高级，而双音节，或双音节以上的形容词，比较级是在字前面加more，最高级则是在字前面加most，举例来说，old, smart, strong, weak, high, low等
He is taller than his brother.
2 特殊的比较级规则
在上一节，我们说明了最基本的规则，那就是单音节形容词加er或est，双音节
的形容词前面加more或most。

但以下就是这些基本规则的例外。

(1)
(2)ier，或iest：
(3)er
(4)
英文中，有几个特殊的字，他们的比较级完全没有规则，以下是一些例子，读者
3 比较形的用法
大多数比较级句子里会有than，以下是一些例子：
I am older than he.
His English is better than mine.
San Francisco is more beautiful than New York.
His car is cheaper than your car.
He is the most diligent student in his class.
I like apples more than oranges.
He has more money than his brother.
He is stronger than his brother.
I am older than he (is).
She is more smart than I (am).
习惯上的is和am都省略掉的，由以上的解释可以看出，than后面的句词应该是主词，而非受词。

My head is larger than your head.或者 My head is larger than yours.
正确的句子应该是：
My house is larger than your house.
或者 My house is larger than yours.
The temperature of this city is higher than the temperature of San Francisco.
或者 The Temperature of this city is higher than that of San Francisco.
The height of Himalayas is greater than the height of Mt. Fuji.
或者 The height of Himalayas is greater than that of Mt. Fuji.
请注意以下的例子，句子中没有than，但仍有比较级：
Among all the teachers who have taught me, he is the best.
This is the best movie I have ever seen.
This food is the worst one which I have ever eaten.
John is the stronger one.
Do we have a better choice?
Mary is the more diligent one.
He is the older of the two.
He is one of the best movie actors.
This area is one of the hottest areas in the world. He is one of the fastest swimmers of America.
This is a book which I like most.。