摘要:
**基本信息**
以环保主题为载体,通过“口诀速记+核心精讲+易错突破+专项精练”体系,系统整合情态动词、数量比较级等四大语法点,逻辑递进且方法实用,提升语言应用与规则辨析能力。
**专项设计**
|模块|题量/典例|方法提炼|知识逻辑|
|----|-----------|----------|----------|
|情态动词must/mustn’t|10题|口诀“must必须禁mustn’t,后接原形永固定”;核心用法聚焦环保规则|从环保行为规则切入,建立“义务-禁令”语法框架|
|more/less/fewer|10题|口诀“可数少用fewer,不可少用less,多少通用more”;核心区分修饰对象|承接数量对比需求,关联能源用量场景|
|可数/不可数名词|8题|口诀“能源水土不可数,is、much、less来守护”;绝对不可数与可数复数分类|夯实名词基础,支撑数量词正确搭配|
|一般现在时|8题|口诀“自然规律真理性,一般现在永不停”;客观事实描述规则|落脚自然规律表达,形成主题语言闭环|
内容正文:
人教版六年级上册Unit 6 Energy, nature and us
核心语法精讲精练
单元核心语法总览:本单元围绕能源、自然与环保主题,核心必考4大语法:① 情态动词must / mustn’t 表规则与禁令(环保核心);② more/less/fewer 数量比较级(能源用量对比);③ 可数/不可数名词区分(energy/power/water等);④ 一般现在时表客观事实、自然规律,为单元及期末高频考点。
单元语法速记口诀
1. must必须禁mustn’t,后接原形永固定
2. 可数少用fewer,不可少用less,多少通用more
3. 能源水土不可数,is、much、less来守护
4. 自然规律真理性,一般现在永不停
核心语法一:情态动词 must / mustn’t(单元重中之重)
【语法精讲】
1.核心用法:用于环保规则、行为要求、自然保护准则
must:必须、一定要(主动要求、义务、保护环境)
mustn’t:禁止、绝不可以(绝对不允许的破坏行为)
2. 万能规则:must / mustn’t + 动词原形,无人称、单复数、时态变化
3. 句型结构:
肯定:主语 + must + 动词原形
否定:主语 + mustn’t + 动词原形
疑问:Must + 主语 + 动词原形?
【高频易错点】
❌ must后加动词ing/三单形式 ❌ 混淆mustn’t(禁止)和needn’t(不必)
专项练习
一、用must / mustn’t填空
1. We ________ save energy in our daily life.
2. You ________ waste water. It’s bad for nature.
3. People ________ protect trees and forests.
4. We ________ throw rubbish everywhere.
5. Everyone ________ follow the environmental rules.
二、句型转换
6. We must save electricity.(改为否定句)
We ________ save electricity.
7. You must plant more trees.(改为一般疑问句)
________ I plant more trees?
8. We must keep our earth clean.(对划线部分提问)
________ ________ we do?
9. You mustn’t cut down too many trees.(改为肯定句)
You ________ ________ more trees.
10. We must use clean energy.(一般疑问句肯定回答)
Yes, ________ ________.
核心语法二:more / less / fewer 数量比较级(单元必考)
【语法精讲】
1. 核心区分(考试易错TOP1):
more:更多,可修饰可数名词复数、不可数名词
fewer:更少,只修饰可数名词复数(trees, flowers)
less:更少,只修饰不可数名词(energy, water, power)
2. 单元固定搭配:
save more energy 节约更多能源;use less water 少用水;plant fewer trees 更少的树
【高频易错点】
❌ less修饰可数名词 ❌ fewer修饰不可数名词 ❌ 混淆三级词汇用法
专项练习
一、用more / less / fewer填空
1. We need to use ________ energy to protect the earth.
2. Plant ________ trees, and our city will be greener.
3. We should waste ________ water and electricity.
4. ________ people will protect nature in the future.
5. If we cut down ________ trees, the air will be dirty.
二、用所给词的正确比较级填空
6. We have ________ (much) clean water than before.
7. There are ________ (few) birds in the city now.
8. People use ________ (little) coal to make energy now.
9. We need ________ (many) ways to save energy.
10. ________ (little) waste is good for our nature.
核心语法三:单元名词可数与不可数区分
【语法精讲】
1. 绝对不可数名词(单元核心):energy(能源)、water(水)、power(电力)、coal(煤炭)、oil(石油)、air(空气)
✅ 搭配:much / little / less / more + 不可数名词;be动词用is
2. 可数名词复数(单元核心):trees、forests、people、ways、rules
✅ 搭配:many / few / fewer / more + 可数复数;be动词用are
【高频易错点】
❌ energy/coal加s变复数 ❌ 用few修饰能源类不可数名词
专项练习(8题)
一、单句改错(找出错误并改正)
1. There are many energies on the earth. ________
2. We have less trees in our school. ________
3. There are some water in the bottle. ________
二、用is/are填空
4. There ________ much energy in nature.
5. There ________ many ways to save power.
6. There ________ little coal in this place.
7. There ________ a lot of trees in the forest.
8. There ________ clean air in the park.
核心语法四:一般现在时表客观事实与自然规律
【语法精讲】
1. 用法:本单元用于描述自然常识、能源特点、客观真理
2. 规则:客观事实永远用一般现在时;单数主语动词用三单,复数用原形
3. 单元例句:Water keeps us alive. 水维持我们的生命。
【高频易错点】
❌ 描述自然规律误用将来时/过去时
专项练习
一、用所给词适当形式填空
1. Water ________ (keep) all living things alive.
2. Trees ________ (produce) fresh air for us.
3. Clean energy ________ (be) good for the earth.
4. People ________ (need) water and energy every day.
5. The sun ________ (give) us light and heat.
6. Dirty air ________ (make) us sick.
7. Forests ________ (protect) our nature.
8. Saving energy ________ (help) our world.
完整参考答案
一、must/mustn’t 情态动词专项
1. must 2. mustn’t 3. must 4.mustn’t 5.must
6. mustn’t 7. Must 8. What must
9. must plant 10. we must
二、more/less/fewer 比较级专项
1. more 2. more 3. less 4. More 5. more
6. more 7. fewer 8. less 9. more 10. Less
三、名词可数/不可数专项
1. energies→energy 2. less→fewer 3. are→is
4. is 5. are 6. is 7. are 8. is
四、一般现在时客观事实专项
1. keeps 2. produce 3. is 4. need
5. gives 6. makes 7. protect 8. helps
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