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。

如：

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.

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.

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……

如：The more you read the book, the more interesting you found.

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.

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.

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.

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.

副词和形容词一样，也有原级、比较级和最高级三个等级。其构成方式有规则变化和不规则变化两种情况。规则变化的一般规律是：单音节词的比较级和最高级在词尾加-er或-est；多音节词以及-ly结尾的副词（early 除外），前面加more或most。不规则的变化式只能采用“各个击破”的办法去记忆。

⒈ 规则变化

如：

② 不规则变化

例如：

⒈ 单独使用

如：Try to do better next time.下次争取干好一点。

He'lI come back sooner or later.他迟早会回来的。

Please speak more slowly.请讲慢一点。

⒉ 和than一起使用

如：He swims better than I do.他游泳游得比我好。

Can you do any better than that.你能不能干的好一些？

He arrived earlier than usual.他到的比平时早。

⒊ 比较级前可有状语修饰

如：You must work much faster.你必须大大加快干活的速度。

Can you come over a bit more quickly?你能稍稍快点来吗？

⒋ as…as和not so…as结构这两个结构也可结合副词使用

① as…as可用在肯定句中，表示“像……一样"，后面的副词要用原级。

如：She can run as fast as a deer.她能跑的像鹿一样快。

② 在否定句中，as…as和so…as都可以用。

例如：I don't go there as much as I use.我现在到那里不象过去那么多了。

I didn't do as(so)well as I should.我做的不如我应做的那么好。

③ 这种句子中也可以有一个表示程度的状语。

例如：She can read twice as fast as he does.她阅读的速度比他快一倍。

副词最高级可修饰动词，前面多数不带定冠词 the。

如：He laughs best who laughs last.（谚语）谁笑在最后谁笑的最好。

of the four of us,I sang(the)worst.我们四人中我唱的最差。

副词比较级和最高级还可用在一些特别结构或短语中。

⒈ more and more 越来越……

例如：It rained more and more heavily.雨下得越来越大了

She went farther and farther away.她越走越远了。

⒉ the more..the more 越……越……

例如：The more I work,the more I accomplish.我干得越多，完成的就越多。

⒊ had better(not)do sth最好（不要）做某事

例如：We'd better not disturb him. 我们最好不要打扰他。

What had we better do?我们最员?