内容正文:
Unit2 数量比较 & as…as 同级比较知识点汇总
一、数量的比较
(一)两者数量对比
1. more … than 比……多
✅ 适用:可数名词、不可数名词通用
例句:He has more books than me. 他的书比我多。
2. fewer … than 比……少
✅ 仅修饰可数名词复数
例句:Tom is in fewer clubs than Jack. 汤姆参加的俱乐部比杰克少。
3. less … than 比……少
✅ 仅修饰不可数名词
例句:We drink less coffee than tea. 我们喝咖啡不如喝茶多。
> 📌核心规则:“比……多”统一用more;“比……少”可数用fewer,不可数用less。
(二)三者及以上数量对比(最高级)
1. the most 最多
✅ 可数、不可数名词通用
例句:Simon drinks the most milk. 西蒙喝的牛奶最多。
2. the fewest 最少
✅ 仅修饰可数名词复数
例句:She can sing the fewest songs in our class. 班里她会唱的歌最少。
3. the least 最少
✅ 仅修饰不可数名词
例句:He finishes the least work of us three. 我们三人中,他完成的工作最少。
> 📌核心规则:表示“最多”统一用most;表示“最少”,可数名词用fewest,不可数名词用least。
二、as … as 同级比较
(一)基本结构
1. as + 形容词/副词原级 + as
含义:和……一样(程度相同)
例句:Mary is as careful as Linda. 玛丽和琳达一样仔细。
2. not as + 原级 + as
含义:不如……(程度不同)
例句:He does not run as fast as Tom. 他跑步没有汤姆快。
⚠️注意1:as…as结构内部必须使用形容词/副词原级,不能使用比较级。
⚠️注意2:否定结构 A is not as … as B = A不如B……
同义转换:
This book is not as interesting as that one.
= This book is less interesting than that one.
= That book is more interesting than this one.
(二)拓展否定结构:not so … as
`not so + 原级 + as` 和 `not as + 原级 + as` 含义完全相同,可以互换。
例句:This desk is not so heavy as that one.
= This desk is not as heavy as that one.
= This desk is lighter than that one.
(三)重要易错点
被比较的双方必须是同类事物,避免比较对象不一致。
❌ Her book is as thick as me.(书和人对比,错误)
✅ Her book is as thick as mine.(书和我的书对比,mine=my book,正确)
配套练习题
一、单项选择
1. I have ______ free time than you, because I have more homework.
A. few B. fewer C. little D. less
2. Among all students, Millie has ______ stickers. She collects the most.
A. more B. the most C. fewer D. the fewest
3. This story is ______ interesting ______ that one. They are the same.
A. as; as B. more; than C. less; than D. so; as
4. Tom’s drawing is not ______ good ______ Jack’s.
A. as; than B. so; as C. more; as D. less; as
5. There are ______ birds in this tree than in that tree.
A. less B. little C. fewer D. few
6. Of the three boys, Daniel spends ______ money. He has the least.
A. the most B. more C. the least D. less
7. Your bag is as new as ______.
A. I B. me C. my D. mine
8. Amy drinks ______ water than Kitty. Kitty seldom drinks water.
A. more B. most C. fewer D. fewest
9. This film is not so exciting ______ the one we watched last week.
A. than B. as C. like D. so
10. We have ______ rice than before. We need to buy some.
A. less B. fewer C. little D. few
二、用括号内单词适当形式填空
1. Jack has ______ (few) pens than Simon.
2. Of all the girls, Lucy has ______ (much) free time.
3. The apple is as ______ (sweet) as the pear.
4. He has ______ (little) milk of us three.
5. This classroom is not as ______ (bright) as that one.
三、同义句转换
1. This bike is not as cheap as that one.
= That bike is ______ ______ this one.
2. I have fewer oranges than you.
= You have ______ oranges ______ me.
3. Tom runs the fastest in our class.
No one runs ______ fast ______ Tom in our class.
参考答案与解析
一、单项选择
1. D 解析:time不可数名词,than提示比较级,little比较级less
2. B 解析:根据后文the most,选择the most
3. A 解析:后文the same,使用as…as原级比较
4. B 解析:否定同级比较 not so…as
5. C 解析:birds可数复数,than提示比较级,用fewer
6. C 解析:三者范围,后文the least,选the least
7. D 解析:同类对比,mine=my bag
8. A 解析:than比较级,water不可数,结合句意more
9. B 解析:not so…as 固定搭配
10. A 解析:rice不可数,than比较级less
二、适当形式填空
1. fewer
2. the most
3. sweet
4. the least
5. bright
三、同义句转换
1. cheaper than
2. more; than
3. as; as
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