形容词、副词的比较级和最高级。
1. 形容词和副词的原级比较：当相比较的两者、两部分在程度上相同或相近时，可用原级比较。
结构：a. 肯定：
as+原级+as 和。一样 tom is as old as me/ tim plays basketball as well as mike. b.
否定：not as/so+原级+as 不如。前者不如后者）
this book isn’t as interesting as that one. he doesn’t play as well as jack.
2．形容词和副词的比较级：a.当两者或两部分相比较，表示“..
比。更。时，用比较级。
tom is taller than me./ he runs faster than me./which do you like better, tea or coffee?
c.比较级的规则变化：
1）一般在词尾加er 如：great-greater, soon-sooner.
2）以字母e结尾的词直接加r 如：nice-nicer, late-later
3）以辅音字母+元音字母+辅音字母构成重读闭音节结构，双写最后一个辅音字母再加er.如：big-bigger, hot-hotter
4）以辅音字母+y结尾的，把y变为i再加er.如：happy-happier, early-earlier.
5）部分双音节和多音节词在词前加more. 如：interesting--more interesting, difficult-- more difficult
6）以动词+ed/ing 构成的形容词变比较级前加more. 如：bore--boring--more boring,bore-bored-more relaxing.
relax-relaxed-more relaxed
7）以形容词+ly构成的副词，变比较级前加more. cheap-cheaply-more cheaply,comfortable-comfortably-more comfortably
e.比较级的用法：
1）adj/adv比较级+than 比。更。eric runs faster than lisa.
2）the 比较级。the比较级。越。越。the busier he is, the happier he feels.
3）比较级 and 比较级越来越。the day is getting colder and colder.
4）the +比较级+of the two...两者中较。的 mary is the more beautiful of the two girls.
c.比较级的修饰语：
must/even/far/a lot/still/ a little/a bit/a great deal,倍数等词修饰。
3. 形容词、副词的最高级：
a.用于三者或三者以上的人或事物之间的比较。在句中使用时，最高级前要加the，副词的最高级前可以省略the。
句中常含有比较范围的介词of或in，of+一群人或事物的代词或名词，in后面一般接表示单位或场所的名词。
例句：bill is the tallest boy of our three./jane has the most friends in our class.
he runs the fastest of all./who is the smartest,tom,jack or mary?
it’s the hottest day this week.
b.形容词最高级的特殊用法：（1）序数词后用最高级。
在表达“第几（长、大、远。时，序数词后用adj的最高级形式。the yellow river is the second longest river in china.
2）在表达“最。的。之一”时，用最高级，构成“one of the+adj最高级+可数名词复数”mo yan is one of the most famous writers in china.
3）在表达“某人的最。时，用“某人的+adj的最高级+n”
lisa is my best friend.
4）“the+最高级+of/in/among...与比较级+than any other+n单数。
he is the tallest boy in our class=he is taller than any other boy.
4．形容词、副词变最高级的变化规则：
a.规则变化：
1）一般在词尾加est. 如：great-greatest, soon-soonest.
2）以字母e结尾的词直接加st. 如：nice-nicest, late-latest
3）以辅音字母+元音字母+辅音字母构成重读闭音节结构，双写最后一个辅音字母再加est.如：big-biggest, hot-hottest
4）以辅音字母+y结尾的，把y变为i再加est.如：happy-happiest, early-earliest.
5）部分双音节和多音节词在词前加most. 如：interesting--most interesting, difficult-- most difficult
6）以动词+ed/ing 构成的形容词变最高级前加most 如：bore--boring--most boring,bore-bored-most relaxing. relax-relaxed-most relaxed
7）以形容词+ly构成的副词，变最高级前加most 如：cheap-cheaply-most cheaply,comfortable-comfortably-most comfortably
形容词和副词比较级、最高级的不规则变化：
good/well--better--best many/much--more--most bad/badly/ill-worse-worst
little-less-least far-farther（只指距离）/further（距离程度）-farthest/furthest
old-older（年龄新旧血缘）/elder（只指血缘）-oldest/eldest
一。 写出以下各形容词的比较级和最高级：
1. nice2. fat3. slow4. dry
5. happy6. wet7. much8. ill___
9. little10. bad11. thin12. far
13. early14. careful15. exciting___
green19. few___
二。 根据句意，用所括号内所级形容词的比较等级形式填空：
1. mr. smith isman in this office. (rich)
2. winter isseason of the years. (cold)
3. this radio is not soas that one. (cheap)
4. it is much __today than yesterday. (hot)
5. she is a littlethan her classmates. (careful)
6people came to the meeting than last time. (many)
7. which book isthis one or that one? (easy)
8. my room is __than yours. (small)
9. hainan is __from beijing than hunan. (far)
10. skating isthan swimming. (exciting)
is __than all the others. (tall)
12. things are getting __andbad)
13. the higher you climb, the __it will be. (cold)
14. now our lives are becomingandgood)
are __boys than girls in our class. (few)
___hard) you work, thehappy) your parents will be.
istall) of the two.
all the subjects, he likes english __well).
runsfast) of the three.
gotgood) grades in his class.
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