人教版英语八上Unit3I’mmoreoutgoingthanmysisiter.SectionA（形容词的比较级和最高级）教案

形容词的原级比较级和最高级
教学目标：
1．掌握形容词的比较级和最高级的构成规则
2．通过学习学生能运用比较级和最高级对事物进行比较
3．培养学生的语言表达能力和综合运用知识的能力
教学重难点：
1．熟练掌握形容词的比较级和最高级的构成规则
2．能熟练运用比较级和最高级对事物进行比较
形容词的原级比较级和最高级
一、形容词的比较级和最高级的构成规则：
1.一般情况下直接加-er 或－est。
tall-taller -tallest small-smaller –smallest
2.以不发音的字母e结尾的形容词，直接加-r 或- st。
nice –nicer-nicest safe –safer –safest
3.重读闭音节词末尾只有一个辅音字母时，应先双写辅音字母，再加-er或-est（big/hot/red/wet/fat/thin/sad)
big—bigger -biggest fat—fatter-fattest
4.以“辅音字母＋y”结尾的形容词，变“y”为“i”，再加-er 或-est。
early-earlier-earliest busy-busier-busiest
5. 部分双音节词或多音节词前面加more ,most。
interesting more interesting most interesting
6. 不规则变化：
原级 比较级 最高级
good/well better best
bad/badly/ill worse worst
many/much more most
little less least
far farther/furthest farthest/furthest
old older/ elder oldest/ eldest
2、 形容词原级比较级和最高级的用法：
（一）原级的用法：
1.说明人或事物自身特征、性质或状态，没有比较对象，用原级。
e.g The boy is honest.
2. very, quite, so, too, enough等词修饰形容词原级。
e.g She is quite a beautiful girl.
3.as…as…/not as (so)…as中间用形容词或副词的原级。
e.g Lucy is as tall as Tom.
4.too…to…/not…enough to /so…that…can’t用原级。
e.g She is too young to look after herself.
=She is so young that she can’t look after herself.
=She is not old enough to look after herself.
（二）比较级的用法：
1.A+is+比较级+than+ B e.g Lucy is taller than Lily.
2.形容词前有much ,even ,still, far，any,a lot ,a little ,a bit 等词修饰时，用比较级。This book is much more interesting than that one.
3.AorB 用比较级。Which do you like better , maths or English
4.A+ is+倍数+比较级+than+ B
=A+ is+倍数+as +原级+as+ B
e. g Our classroom is twice larger than theirs.
=Our classroom is twice as large as theirs.
5.the +比较级+of the two/of the twins 两者之中较…
e. g He is the taller of the two.
6. 比较级+ and+比较级，more and more+多音节词或部分双音节词，表示越来越…
e. g The weather is getting warmer and warmer.
The story is more and more interesting.
7. the +比较级 , the + 比较级,表示越…越…
The more trees you plant, the better it will be .
The harder you try, the greater your progress is.
（三）最高级的用法：
1.句子中出现in或of引导的介词短语，用最高级。
（in+地点范围，of+同一类的人或事物。）
My mother is the busiest in my family.
This car is the faster of the four.
2. A,B or C 用最高级。
e. g Which is the biggest city ,Lanzhou, Beijing or Shanghai
Which subject do you like best, English Chinese or PE
3.one of+形容词的最高级+名词的复数形式，其中最…的一个。
e. g Beijing is one of the biggest cities in China.
4. The +序数词+形容词的最高级，第几…
e. g The Yellow River is the second longest river in China.
Shanghai is the second biggest city in China.
5.形容词最高级前有指示代词，物主代词，名词所有格时，不用the。
e. g Lucy is her youngest sister.
This is Tom’s longest ruler.
三．形容词原级比较级和最高级的转换:
1.Basketball is not as interesting as volleyball.
=Volleyball is more interesting than basketball.
=Basketball is less interesting than basketball.
2.Tom is the tallest in our class.
=Tom is taller than any other student in our class.
=Tom is taller than the other students in our class.
PAGE
3