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七年级英语下册Unit6语法讲义
平级的比较
一、平级比较的定义
平级比较用来表示 “两者在某方面程度相同” 或 “两者在某方面程度不同”，核心标志是 as... as... 或其否定形式 not as / so... as...。
二、平级比较的结构
1. 肯定句：表示 “和…… 一样……”
结构：A + be / 动词 + as + 形容词 / 副词原级 + as + B
例句：
She will become as successful as her role model.
I was as happy as you yesterday.
2. 否定句：表示 “不像…… 那样……”
结构：A + be / 动词 + not as /so + 形容词 / 副词原级 + as + B
例句：
My sister is not as careful as my brother.
It isn’t so cold as yesterday.
注意：两个 as 之间的形容词或副词必须使用原级，这一点与用 than 的比较级句型不同。
三、平级比较 vs 比较级
句型 含义 结构 形容词 / 副词形式
as... as... 和…… 一样 A + as + 原级 + as + B 原级
not as / so... as... 不像…… 那样 A + not as /so + 原级 + as + B 原级
比较级 + than 比…… 更…… A + 比较级 + than + B 比较级
四、配套练习
（一）基础填空
This book is __________ (interesting) as that one.
He is not __________ (tall) as his father.
She runs __________ (fast) as her brother.
Today is not __________ (cold) as yesterday.
This movie is __________ (good) as that one.
（二）句型转换
Tom is as tall as Jack.（改为否定句）Tom is __________ __________ __________ Jack.
This room is not as clean as that one.（改为同义句，用比较级）That room is __________ __________ this one.
She is not so careful as her sister.（改为同义句）Her sister is __________ __________ than her.
（三）情景选择
当你想表达 “她和你一样开心” 时，应说：A. She is as happy as you.B. She is happier than you.
当你想表达 “今天不像昨天那么冷” 时，应说：A. Today is not as cold as yesterday.B. Today is colder than yesterday.
五、参考答案
（一）基础填空
as interesting
as tall
as fast
as / so cold
as good
（二）句型转换
not as / so tall as
cleaner than
more careful
（三）情景选择
A
A
平级比较课堂小测
（时间：15 分钟 满分：30 分）
一、单项选择（每题 2 分，共 10 分）
This movie is ______ as that one.A. interesting B. more interesting C. the most interesting
He is not ______ as his brother.A. tall B. taller C. the tallest
She runs ______ as her sister.A. fast B. faster C. the fastest
Today is ______ as yesterday.A. cold B. colder C. the coldest
This book is not ______ as that one.A. good B. better C. the best
二、用所给词的适当形式填空（每题 2 分，共 10 分）
This story is as __________ (exciting) as that one.
He is not as __________ (clever) as his friend.
She sings as __________ (well) as her teacher.
This problem is not as __________ (difficult) as that one.
The river is as __________ (long) as that one.
三、句型转换（每题 2 分，共 10 分）
Tom is as tall as Jack.（改为否定句）Tom is __________ __________ __________ Jack.
This room is not as clean as that one.（改为同义句，用比较级）That room is __________ __________ this one.
She is not so careful as her sister.（改为同义句）Her sister is __________ __________ than her.
This movie is as popular as that one.（改为否定句）This movie is __________ __________ __________ that one.
He runs as fast as me.（改为同义句）I don’t run __________ __________ as him.
参考答案
一、单项选择
A
A
A
A
A
二、用所给词的适当形式填空
exciting
clever
well
difficult
long
三、句型转换
not as / so tall as
cleaner than
more careful
not as / so popular as
as fast / so fast

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