Many Chinese students think science subjects are foreign languages.[ ]A. more difficult as B. less difficult thanC. much difficult thanD. so difficult as-九年级英语-00教育-零零教育信息网

Many Chinese students think science subjects are foreign languages.[ ]A. more difficult as B. less difficult thanC. much difficult thanD. so difficult as-九年级英语

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四、下列形容词和副词没有比较级和最高（即表示”最高程度”或”绝对状态”的形容词和副词没有比较级和最高级）
empty , wrong , perfect , unique , extreme , excellent , favourite (GB)/ favorite (GA) , true , right , correct , extremely ...

形容词的比较级和最高级用法：
形容词比较等级用法：
1.没有比较对象时，用原级。
I have a new computer.
2.两者比较，程度相同。
A+系动词+as+adj.+as+B.
Our school is as beautiful as theirs.
3.两者比较，程度不同。
A+系动词+not as+adj.+as+B.
The weather here is not as hot as that in the south.
4.A比B更…
The earth is bigger than the moon.
5.比较级前可以用much,even,still,far,a lot,a little,a bit,any等修饰。
Your room is much bigger than mine.
I’m a little shorter than her.
6.用比较级可以表示最高级含义：
John is stronger than any other boy in his class.=John is stronger than any of the other boys.
两者不属于同一范畴，不能用other.
Chongqing is bigger than any city in Sichuang.
7.“比较级+and+比较级” 表示“越来越…”
China is becoming more and more beautiful.
Days are getting longer and longer.
8.用the+比较级，the+比较级表示”越…就越…”.
The busier he is, the happier he feels.
9. Which/Who+is+比较级 A或B？
A和B哪一个/谁更…?
Which is better,this one or that one?

最高级用法：
表示三者或三者以上的人或物的比较，一个在某方面超过其他两个或多个时，用最高级，结构是
主语+系动词+the+形容词最高级+of/in短语。
This story is the most interesting of the three.
1. one of the+形容词最高级+名词复数
它的意思是最…之一。
English is one of the most important languages in the world.
2. which/who…+is+形容词最高级
“…最...”
Which is the heaviest,the horse,the sheep or the elephant?
3.最高级前可以用序数词
The Yellow River is the second longest river in China.

形容词的比较级和最高级的变化规则：

构成	原级	比较级	最高级
一般加er，est	tall	taller	tallest
以字母e结尾只加 r,st	large	larger	largest
以一个辅音字母结尾的重读闭音节，双写这一辅音字母后再加er,est	red	redder	reddest
	hot	hotter	hottest
	thin	thinner	thinnest
以辅音字母+y结尾的词，将y变为i再加er,est	easy	easier	easiest
	happy	happier	happiest
	ugly	uglier	ugliest
	early	earlier	earliest
其他双音节词和多音节词，在词前加more或most	interesting	more interesting	most interesting