1. 规则变化：
(1) 单音节和少数双音节词。
a. 多在词尾加-est，如：tallest
b. 以不发音的e结尾，直接加-st，如：nicest
c. 以辅音字母加y结尾，把y变i，再加-est，如：funniest
d. 以一个辅音字母结尾而前面只有一个元音的词，双写辅音字母再加-est，如：biggest, hottest等。
(2) 多音节词和少数双音节词，在词前加most, 如：most beautiful
2. 不规则变化：www .x
good/well---best bad/ ill---worst many/ much---most
little---least far---farthest/ furthest
二、形容词最高级的几种句型。
11.表示三者或三者以上（人或物）的比较，其中有一个超过其他几个。形容词最高级前要加the，副词最高级前常省略the, 后面通常带of（in）短语来说明比较的范围（of 后的名词或代词表示与主语属同一类；in 表示时间或空间范围）。
在我们班上他最高。 he istall) _our class.
玛丽是这三个学生中最小的。
mary isyoung) _the three students.
2. one of + the +形容词最高级 + 名词复数最…的…之一。
tom is one of the cleverest students in our class.
3. the + 序数词 + 形容词最高级 + 可数名词单数 + in 短语
第几（长，大，远）…
the yellow river is the second longest river in china.
4.形容词最高级用在选择疑问句中，which/ who be+ the 最高级… a, b or c?
which city is the biggest, beijing, shanghai or linyi?
5. the + 形容词最高级 + 可数名词单数 + of (in)短语 =
than the other + 名词复数。
比较级 +
than any other + 可数名词单数
比较级和最高级的同义句转换。
he is the tallest boy in his class.
he is taller than any other boy in his class.
he is taller than the other boys in his class
6. 当形容词最高级有形容词性的物主代词或名词所有格修饰时，最高级前的定冠词 the 省略。
linda is my sister’s best friend.
“用twice 等表示倍数的词+ as +原级＋as…”表示甲是乙的几倍。
“用twice 等表示倍数的词+比较级than …表示甲比乙···几倍。
这间房是那间房面积的两倍。
this room is __as big as that one.
=this room is __bigger than that one
1 which isbig) ,the sun,the moon or the earth?
is __beautiful),the black coat or the blue one?
mooncake is __cheap) of all.
isstrong) in the class.
is __widely)spoken in the world.
6、黄河是中国第二长河。the yellow river isriver in china.
7. playing computer games isof all the activities.(interesting).
is one of thefriendly) people in the class.
9你和你的叔叔一样高吗？
asas your uncle?
10女孩比男孩唱得好吗？是的。
___the girlthe boy? yes,she __
11 北京是中国最美丽的城市。
练一练。一、 写出下列形容词的比较级和最高级。
1. old2. busy
3. thin4. many
5. slow6. delicious
二、选择正确的答案。
1. bob never does his homework___mary. he makes lots of mistakes.
a. so careful as b. as carefully as c. carefully as d. as careful as
air in our town is __than it used to be. something must be done to it.
a. very good b. much better c. rather than d. even worse
3. i feel __better than yesterday. a. more b. very c. the d. far
4. china has a large population than __in the world.
a. all the countries b. every country c. any country d. any other country
sick boy is getting __day by day.
b. bad c. badly c. worst
necklace looks __and__ sells__.
a. well, well b. good, nice c. nice, good d. nice, well
8. doctor wang __heart operation
a. is interested on b. like doing c. does well in d. is good at
population of shangdong is__ than that sichuan.
a. smaller b. larger c. less d. large
didn’t go shopping didn’t __
a. so b. either c. too c. neither
11.__delicious the food is!
b . how a c. what d. what a
12. what animal do like __i like all kinds of animals.
a. better b. best c. very d. well
is a very large island. it’t the second__ island in china.
b. larger c. largest d. most large
you want to book a round –trip ticket,you’ll h**e to pay __30.
b. other c. the other d. another
horse is __than a dog.
he**y he**ier he**ier he**y
三。用所给词的恰当形式填空。
isbig) ,the sun,the moon or the earth?
is __beautiful),the black coart or the blue one?
mooncake is __cheap) of all.
isstrong) in the class.
is __widely)spoken in the world.
(四)翻译句子：
1．你的问题是两个中比较难的那个。your question isof two.
2． 你游泳没有你弟弟好。you can’t swimyour brother.
3． 今天比昨天冷的多。it istoday___it was yesterday.
4． 对这个故事我比另一个喜欢的多。this story isthan that one.
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