形容词比较级的基本用法，即用于两个人或事物的比较，其一般句式的构成是：主语+be(is, am, are) +形容词比较级+than+比较对象 ，than 后接人称代词时，可以是主格或者是宾格。Than 前后比较对象必须是同一范畴。
形容词比较级的用法和句型
1. one of the +最高级,表示“最……之一”.
The Yellow River is one of the longest rivers in China.
2. 比较级之前加much, even, a little, a lot等,表示不同程度.
It’s even warmer today than yesterday.
3. “比较级+and+比较级”或“more and more+原级” 表示“越来越……”.
She is becoming more and more beautiful.
Things are getting better and better.
4. “the+比较级,the+比较级” 表示“越……越……”.
The more, the better.
5. “比较级+than any other+单数名词”表示“比任何一个都……”.
He is cleverer than any other boy in his class.
6. 比较级前可用“数词+名词”构成的名词短语表示确定的数量.
She could not take a step further.
7. 比较对象要呼应,相比内容必须相同,相比对象可用that,those或do代替.
The price of meat is higher than that of rice.
8.比较级在比较结构中一定要将自己本身除外（指在同一范围内）,常用other或else来表示.
Jack studies harder than anyone else in his class.
9. “甲+be+the+比较级+of two+……”表示 “两者中较……..的”.
Tom is the taller of the two (brothers).
10. 次数、倍数、分数和百分数的比较级.原则：大于或小于的数量必须前置
The room is one-third as big as that one.
