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教学课件
外研英语七年级下册
Unit 6语法专项—— as...as 与 more...than 句型
全解精讲+分层练习
学习目标
理解as...as和more/less...than的核心含义
掌握两类句型的肯定、否定及特殊结构
学会用副词修饰比较级，强化表达语气
区分易混结构，规避使用错误
比较句型的分类与定义
英语中两者比较分同级和不同级两类
as...as是同级比较，表两者某方面“一样……”
more...than是不同级比较，表前者“比后者更……”
less...than是不同级比较，表前者“不如后者……”
两类句型是描述事物差异与共性的基础
as...as句型——肯定形式
核心结构：as + 形容词/副词原级 + as
前一个as为副词修饰原级，后一个as为连词接比较对象
例：The hotel room was as comfortable as my own home.
译：这个酒店房间和我自己的家一样舒适。
注意：中间必须用形/副原级，不可用比较级
as...as句型——否定形式
核心结构：not as/so + 形容词/副词原级 + as
表“不如……”，否定句中as可替换为so，二者通用
例：This river is not as wide as the Yangtze River.
译：这条河不如长江宽。
关键：依旧使用形/副原级，是考试高频考点
as...as句型——特殊结构
适用：比较后接可数名词单数的情况
核心结构：as + 形容词 + a/an + 可数名词单数 + as
例：He is as clever a student as his brother.
译：他是和他哥哥一样聪明的学生。
注意：a/an要放在形容词后、名词前
more...than句型——基础用法
适用：多音节形容词/副词的比较级表达
核心结构：more + 形/副原级 + than
例：Trying local food is more interesting than visiting places of interest.
译：品尝当地美食比参观名胜更有趣。
提示：单音节词直接加er，不用more+原级
less...than句型——反义比较
核心含义：表前者在某方面“不如后者……”
核心结构：less + 形容词/副词原级 + than
例：This book is less difficult than that one.
译：这本书不如那本难。
特点：比not as/so...as更偏向书面表达
比较级的修饰词用法
可在比较级前加副词，加强或减弱比较语气
常用词：much/far（……得多）、a little（一点）
结构：修饰词 + 比较级 + than
例：The food was much hotter than I expected.
译：这道菜比我预想的辣得多。
核心句型用法对比（一）
句型 比较类型 核心含义
as...as 同级 和……一样
not as/so...as 不同级 不如……
more...than 不同级 比……更
less...than 不同级 不如……
核心句型用法对比（二）
句型 例句
as...as The waterfall is as beautiful as a painting.（瀑布和画一样美）
not as/so...as This hotel isn't as big as the one we stayed in.（这家酒店不如我们上次住的大）
more...than The boat ride was more exciting than taking a roller coaster.（乘船比坐过山车更刺激）
less...than This path is less crowded than the main road.（这条小路不如主干道拥挤）
易混点：not as/so...as 与 less...than
二者核心含义一致，均表“不如……”，可互换
not as/so...as更口语，日常交流使用更频繁
less...than更书面，适合写作、正式表达
例：She is less tall than Lucy = She isn't as tall as Lucy.
译：她不如露西高。
基础小练习（一）——用所给词的适当形式填空
1.The park is _____________ (big)than the small garden next to it.
2.She sings ______________ (well) her music teacher.
3.This story is _________________ (interesting)than the one I read yesterday.
4.The classroom is _____________ (clean) the office.
bigger
as well as
more interesting
as clean as
基础小练习（二）——句型转换
1.Tom is taller than Mike.（用not as...as改写）
2.This bag is as heavy as that one.（用more...than表否定）
3.The film is very wonderful.（用much more wonderful than改写）
Mike is not as tall as Tom.
That bag is not more heavy than this one.
The film is much more wonderful than I thought.
语法小贴士——比较对象要一致
使用比较句型时，前后比较对象必须同类
错误：The weather in Beijing is colder than Shanghai.
正确：The weather in Beijing is colder than that in Shanghai.
译：北京的天气比上海的天气冷。
语法小贴士——避免重复比较
比较级本身含“更”的含义，不可加very/too
错误：The box is very heavier than that one.
正确：The box is much heavier than that one.
译：这个盒子比那个重得多。
专项练习（一）——单项选择
1.The music is ______ beautiful ______ the song we heard last night.
A. as; as B. more; than C. less; than D. so; as
2.This math problem is ______ difficult ______ the one we did just now.
A. much; than B. as; as C. more; as D. so; than
3.Running is ______ tiring ______ walking, so I like walking better.
A. as; as B. more; than C. less; than D. so; as
4.The cake was ______ sweeter ______ I thought it would be.
A. as; as B. so; as C. much; than D. less; than
5.She is ______ lovely ______ girl ______ her cousin.
A. as; a; as B. so; a; as C. as; an; as D. more; a; than
A
B
B
C
A
专项练习（二）——语篇填空
阅读短文，用as...as/more...than/less...than及词的适当形式填空
My school is a beautiful place. It is 1. ______________ (big) the school near my home. The playground is 2. ______________ (wide) a small square, and the flowers in the school are 3. _________________ (beautiful) the ones in the park.
Our classroom is 4. ______________ (bright) the library, and our teachers are 5. ______________ (kind) any other teachers in the city. Studying here is 6. ______________ (happy) staying at home alone. I love my school very much.
bigger than
as wide as
more beautiful than
as bright as
kinder than
happier than
专项练习（三）——完成句子
1.这部电影和我看过的那部一样精彩。
The movie is ______ ______ ______ the one I watched.
2.骑自行车比坐公交车更健康。
Riding a bike is ______ ______ taking a bus.
3.这个公园不如中央公园大。
This park is ______ ______ ______ _______ the Central Park.
4.他是和他爸爸一样优秀的医生。
He is ________ ________ ________ ________ __________ his father.
5.这杯咖啡比我点的那杯苦得多。
This cup of coffee is ______ ______ ______ the one I ordered.
as wonderful as
healthier than
not as big as
as excellent a doctor as
much bitter than
错题点拨——as...as结构常见错误
错误1：as + 比较级 + as（混淆原级与比较级）
错误2：as a + 形容词 + 名词 + as（冠词位置错误）
错误3：very as + 原级 + as（多余修饰副词）
改正：严格遵循as+原级+as/as+形+a/an+单名+as结构
错题点拨——more...than结构常见错误
错误1：单音节词用more+原级（如more tall）
错误2：more + 比较级 + than（重复比较）
错误3：修饰词放more后（如more much interesting）
改正：单音节词直接加er；修饰词放more前
语法梳理——as...as句型总结
肯定：as + 形/副原级 + as
否定：not as/so + 形/副原级 + as
特殊：as + 形 + a/an + 单名 + as
核心：全程使用原级，比较对象要同类
语法梳理——more/less...than句型总结
more...than：more + 多音节原级 + than（表“更……”）
less...than：less + 形/副原级 + than（表“不如……”）
修饰：much/far/a little + 比较级 + than
注意：单音节词用“er+than”，不用more
整体语法框架回顾
两类比较：同级比较（as...as）、不同级比较（more/less...than）
三个核心：原级使用、比较对象一致、修饰词位置
两个易混：not as/so...as与less...than的语体差异
一个关键：结合语境选择合适的比较句型
教学课件
Unit 6语法专项—— as...as 与 more...than 句型
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