一、形容词的比较级和最高级的变换形式
⒈ 在形容词词尾加上-er，-est构成比较级、最高级。
如：
⒉ 双写最后一个字母，再加上一er、-est构成比较级、最高级。
如：
⒊ 以不发音的字母e结尾的形容词，加上-r，-st构成比较级、最高级。
如：
⒋ 以字母y结尾的形容词，把y改为i，再加上-er、-est构成比较级、最高级。
如：
⒌ 双音节、多音节形容词，在单词前面加上-morel-mo成比较级、最高级。
如：
⒍ 不规则变化的形容词。
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如：
二、原级用法
⒈ 原级比较：as+形容词或副词原级+as
① 在否定句或疑问句中可用so.…as。
例如：He can not run so fast as you.
② 当as.…as中间有名词时采用以下格式：
as +形容词+a+数名词
as+many/much+名词
如：This is as good an example as the other is.
I can carry as much paper as you can.
③ 用表示倍数的词或其他程度副词做修饰语时，放在as的前面。
如：This room is twice as big as that one.
I can carry as much paper as you can..
④ 用表示倍数的词或其他程度副词做修饰语时，放在as的前面。
如：This room is twice as big as that one.
-公量途元司西网a61c费慧件法限755d29c0c7c6aaa4科优有57df学上广技量东f86d软升 Your room is the same size as mine.
⒉ 倍数表达法
① A is three(four, etc) times the size (height,length etc.)of B.
如：The new building is four times the size(the height)of the old one.这座新楼是那座旧楼的四倍大(高)/这座新楼比那座旧楼大(高)三倍。
② A is three(four, etc.) times as big (high,long,etc.)as B.
如：Asia is four times as large as Europe.亚洲是欧洲的四倍大/亚洲比欧洲大三倍。
③ A is three (four etc.) times bigger (higher, longer etc.) than B.
如：Your school is three times bigger than ours.你们的学校比我们的学校大三倍。
用times表倍数通常用于三倍以上，两倍可以用twice或double.
三、形容词比较级的用法
形容词的比较级用于两个人或事物的比较，结构形式如下：
⒈ A+is/ arm/are 形容词比较级+than+B
如：She is taller than
Tom is more athletic than Sam.
⒉ 比较级+and+比较级，表示“越来越”
例如：warmer and warmer
nicer and nicer
more and more beautiful
⒊ the+比较级……，the+比较级……
⒋ 比较级的修饰语有：much,far,even,a little,a bit,a lot 等。
如：He made fewer mistakes than I did.
He is even richer than I.
四、形容词最高级的用法
形容词最高级用于两个以上的人和物进行比较，其结构形式为：主语+谓语(系动词)+the +形容词最高级+名词+表示范围的短语或从句，比较常用在in，of 或among的结构中，形容词最高级前+the.
如：I am the best of the three.
He is the thinnest boy in my class.
五、重点与难点
⒈ 形容词原级表示比较级含义：
如：John is not so stupid as Mike.
John is less stupid than Mike.
John is cleverer than Mike.约翰不象迈克那么笨。
⒉ 用比较级表示最高级：
如：约翰是班里最高的男生。
John is taller than any other boy in the class.
John is the tallest boy in the class.
John is taller than any other boy.
⒊ the more.……the more..表示越.….越…….
如：The more books you read,the wider your knowledge is.
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The more food you eat,the fatter you are.
⒋ more and more..表示越来…….越……
如：More and more students realized the importance of a foreign language.
Our country is getting stronger and stronger.
⒌ 如在两者间表示最……时，要在比较级前加the，而且还用of the two,of the pair短语：
如：John is the clever of the two boys.
of the two boys,John is the clever.