倍数比较级-2025-2026学年高中英语必修一语法知识点全解（外研版）

高中必修1外研版 【语法专版】 倍数比较级全解 语法专版 【专题】倍数比较级 高中外研版必修1 考频分析 高一外研版必修1中，倍数比较级是重要语法点，考频占句法总量的15%左右，主要分布在核心 题型：单项选择(1-2题)、完形填空(1-2题)、语法填空(1题)、阅读理解（间接考察，影响长难 句理解)。在数量比较类题目中，倍数表达结构（倍数+as..as./倍数+比较级+than/倍数+the+名 词+of)的正确运用是解题关键。 考查内容 ·基本倍数结构：倍数+as+原级+as;倍数+比较级+than;倍数+the+名词+of ·倍数与分数/百分数结合：分数/百分数+o+倍数结构的转换与应用 。语境中的倍数表达：倍数在图表描述、数据分析及日常比较场景中的准确运用 知识点一：倍数比较级的构成及用法 1.”A+倍数+as+原级+as+B”（A是B的几倍) 。常见倍数词：twice(两倍)、three times(三倍)、four times(四倍)等 。例句： l.This room is twice as big as that one..(这个房间是那个的两倍大) 2.The river is three times as long as the path.(这条河是那条小路的三倍长) 2.”A+倍数+比较级+han+B”(A比B大/长/多几倍) ·比较级变化规则：单音节词加-er(如big→bigger),双音节词前加more(如important-一→more important) 。例句： l.The population of this city is three times larger than that of the town.(这个城市的人口比那个城镇 多三倍) 高中必修1外研版 【语法专版】 倍数比较级全解 2.This building is twice taller than the old one.（这座楼比那座楼高两倍) 3.”A+倍数+the+名词(size//length/,height/weight等)+of+B”(A的大小/长 度/高度/重量等是B的几倍) ·常用名词：size(大小)、length(长度)、height(高度)、width(宽度)、weight(重量) ·例句： 1.The new square is four times the size of the park.(新广场的大小是公园的四倍) 2.The whale's weight is twenty times the weight of the elephant.(鲸鱼的体重是大象的二十倍) 知识点二：倍数比较级 1.倍数+as…as结构（A是B的.倍) ·结构：A+be+倍数+as+形容词/副词原级+as+B 。例句： 1.This room is twice as large as that one.(这个房间是那个房间的两倍大) 2.He runs three times as fast as his brother.(他跑得比他弟弟快三倍) 2.倍数+比较级+than结构(A比B多/大.倍) 。结构：A+be+倍数+形容词比较级+than+B 。例句： l.The population of China is about four times larger than that of the US.(中国人口大约是美国的四 倍) 2.This building is twice taller than the old one.(这座楼比那座楼高两倍) 3.倍数+he+名词+of结构（A的是B的.倍) 。常见名词：size（大小)、length(长度)、width(宽度)、height(高度)、weight（重量) 。结构：A+be+倍数+the+名词+of+B 。例句： l.The river is three times the length of that one..(这条河是那条河的三倍长) 2.The box is twice the weight of the bag.(这个箱子是那个袋子的两倍重) 4.倍数+what从句(A的…是B的.倍) 高中必修1外研版 【语法专版】 倍数比较级全解 ·结构：A+be+倍数+what+B+be(was/were) 。例句： 1.The output this year is five times what it was ten years ago.（今年产量是十年前的五倍) 2.The price of the car is twice what I expected..(这辆车的价格是我预期的两倍) 知识点三：倍数比较级 1.”A+be+倍数+as+形容词原级+as+B”（A是B的…倍) 。基础搭配拓展（中考必背）： l.This room is twice as big as that one.（这个房间是那个房间的两倍大。) 2.The tree is three times as tall as the house.(这棵树是房子的三倍高。) 3.Her bag is four times as heavy as mine.(她的包是我的四倍重。) 4.The river is five times as long as the lake.(这条河是那个湖的五倍长。) 5.This book is twice as expensive as that magazine.(这本书是那本杂志的两倍贵。) 2.”A+be+倍数+形容词比较级+than+B”(A比B…倍) 。基础搭配拓展（中考必背）： 1.The population of China is about four times larger than that of the US.(中国的人口大约是美国的 四倍。) 2.This building is twice taller than the old one.（这座楼比楼高一倍。) 3.The new bridge is three times longer than the previous one.(新桥比原来的桥长三倍。) 4.His salary is five times higher than mine.(他的工资是我的五倍。) 5.The speed of the car is twice faster than that of the bike..(汽车的速度是自行车的两倍。) 3.”A+be+倍数+the+名词(size/length/.height等)+of+B”（A的"是 B的…倍) 。基础搭配拓展（中考必背）： 1.The playground is three times the size of our classroom.(操场是我们教室的三倍大。) 2.The street is twice the length of the alley.(这条街是那条小巷的两倍长。) 3.The mountain is five times the height of the hill.(这座山是那座小山的五倍高。) 4.This square is four times the area of the park.(这个广场是公园面积的四倍。) 5.The lake is twice the depth of the river..(这个湖的深度是那条河的两倍。) 3 高中必修1外研版 【语法专版】 倍数比较级全解 考法精析 考法一：倍数比较级基本结构辨析 核心：根据语境选择正确的倍数比较级结构(A+倍数+as+原级+as+B/A+倍数+the+名词 +of+B) 真题1（语法填空）： The newly built stadium is three times(big)as the old one. 答案：as big 解析：根据结构“A+倍数+as+原级+as+B”,此处需填入“as big”,构成“three times as big as”,表示“三倍大”。 真题2（完形填空）： The length of the new bridge is four times of the old bridge. A.that B.this C.one D.it 答案：A 解析：根据结构“A+倍数+the+名词+of+B”的变体（用that指代前文的length),此处需填入 that,构成“four times that of'”,表示“四倍长”。 考法二：倍数比较级的同义转换与歧义避免 核心：掌握不同倍数结构的同义转换方法，能识别并避免”倍数+比较级+ha”结构的歧义 真题1（语法填空)： The new playground is three times as large as the old one.(同义转换) The new playground is three times_of the old one. 答案：the size 解析：”A+倍数+as+原级+as+B”可转换为”A+倍数+the+名词+of+B”,此处large对应名 词size,故填the size。 真题2（单项选择)： The population of this city isthat of our town. A.twice larger than B.twice as large as C.twice as larger as D.two times as large 答案：B 解析：选项A中'twice larger than'”存在歧义，不符合避免歧义的优先用法；选项C中as.as中间应 用原级large;选项D缺少as;”A+倍数+as+原级+as+B”为避免歧义的标准结构，故选B。 4 高中必修1外研版 【语法专版】 倍数比较级全解 考法三：倍数比较级的同义转换与反义表达综合运用 核心：掌握“倍数+as.…as”“倍数+比较级+han”“倍数+the+名词+of”结构的同义转换及反义 表达，能在不同语境中灵活转换句式 真题1（单项选择)： The new playground is three times as big as the old one.Which sentence has the same meaning? A.The new playground is three times bigger than the old one B.The new playground is three times the size of the old one C.The old playground is three times as big as the new one D.The old playground is three times bigger than the new one 答案：B 解析：原句为“倍数+as+原级+as”结构，意为“新操场是操场的三倍大”。选项B“倍数+the叶 名词+of”结构与原句同义：选项A中“three times bigger than”表示“比…大三倍”，实际为原 句的四倍，与原意不符：选项C、D逻辑错误，应为操场比新操场小。 真题2（语法填空)： This tree is twice as tall as that one.(改为反义句) That tree is_ this one. 答案：half astall as 解析：原句“这棵树是那棵树的两倍高”的反义表达为“那棵树是这棵树的一半高”，“倍数+s+ 原级+as”的反义结构可用“分数+as+原级+as”,“一半”用“half”表示，故填“half as tall as”。 解题小妙招 倍数比较妙招 倍数结构有两种，基本用法要记清： A倍as原级asB,A倍the名词ofB: 同义转换看对应，形容词变名词行： 歧义避免是关键，倍数as原级as优先选； that those替名词，避免重复更简明： as.…as中用原级，比较级than易歧义： 综合应用看语境，结构正确无疑问。 真题演练 演练一：单项选择试题（共10题） 1.The population of China is that of Japan A.three times as large as 高中必修1外研版 【语法专版】 倍数比较级全解 B.three times larger than C.three times as larger as D.three times more large than 2.This river is the one in my hometown. A.twice length of B.twice the length of C.twice longer than D.twice as longer as 3.The new building is the old library. A.four times as tall than B.four times the height of C.four times taller as D.four times height of 4.The output ofrice this year islast year. A.150%as much as B.150%more than C.150%as many as D.150%much as 5.The price of this car is now half_it was five years ago. A.of what B.than that C.as those D.that of 6.Her salary ismine. A.three times as high than B.three times higher as C.three times the height of D.three times as high as 7.The area of this park isthat of the square. A.half as big than B.half as big as C.half bigger than D.half the big of 8.This room is_the one next door. A.a third as small as B.a third smaller than C.a third as smaller as D.a third the size than 9.The speed of the train isthe bus. 6 高中必修1外研版 【语法专版】 倍数比较级全解 A.twice as fast than B.twice faster as C.twice the speed of D.twice as faster as 10.The weight of the elephant is_the horse. A.five times as heavy as B.five times heavier than C.five times heavy than D.five times as heavier as 演练二：填空试题（共10题） 1.The new school is twice the old one..(这座新学校是学校的两倍大) 2.The length of the bridge is three times__he river.(这座桥的长度是那条河的三倍) 3.This box is a quarterthat one.(这个盒子的重量是那个的四分之一) 4.The cost of the project is now300%_last year.(这个项目的成本是去年的三倍) 5.The size of this city is four times_of my hometown.(这座城市的大小是我家乡的四倍) 6.The machine's efficiency is half_it was last month..(这台机器的效率是上个月的一半) 7.The number of students in our class is not twice theirs.(我们班的学生人数不到他们班的两倍) 8.The height of the mountain is five times_the hill..(这座山的高度是那座小山的五倍) 9.The output of this factory is50%it was in2020.(这家工厂的产量是2020年的一半) l0.The price of the house is three times_the car.(这栋房子的价格是那辆车的三倍) 演练三：语法填空试题（共10空) The Eiffel Tower,one of the most famous landmarks in Paris,attracts millions of visitors every year.Many people don't know that its height is actually(1)(two)the original design.When built in 1889,it was 300 meters tall,but with the addition of antennas,it is now 330 meters-(2)(1.1 times as tall as)the original structure. The area of the base of the Eiffel Tower is about 10,000 square meters,which is_(3)(three times the size of)a standard football field.The weight of the tower is 7,300 tons,_(4)(less than half as heavy as)the Pyramid of Giza,which weighs about 5.9 million tons. Interestingly,the tower's width at the base is 125 meters,while at the top it is only 41 meters-(5)(a third as wide as)the base.The number of steps to the top is 1,710,which is(6)(twice as many as)the steps in the Statue of Liberty(860 steps). 7 高中必修1外研版 【语法专版】 倍数比较级全解 In terms of visitor capacity,the Eiffel Tower can hold 5,000 people at once,(7)(five times the capacity of)a small theater(1,000 people).The ticket price for adults is e17,which is-(8)(170%as much as)the price in 2010(E10). Engineers say the tower's durability is remarkable:its lifespan is estimated to be 1,000 years,(9)(ten times that of)the average modern building (100 years).Finally,the tower's height is(10)(not three times as tall as)the Burj Khalifa(828 meters),but it remains an icon of architectural genius. 答案区 演练-：1.A2B3B4.A5.A6.D7B8.A9.C10.A 1.as big as 2.the length of 3.as heavy as 4.as much as 5.that 6.of what 7.as many as 8.the height of 9.as much as 10.the price of 1.twice 2.1.1 times as tall as 3.three times the size of 4.less than half as heavy as 5.a third as wide as 6.twice as many as 7.five times the capacity of 8.170%as much as 9.ten times that of 10.not three times as tall as