Unit 6 Energy, nature and us 核心语法精讲精练(专项训练)-2026-2027学年人教PEP版英语六年级上册
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。
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)
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?
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❌ must后加动词ing/三单形式 ❌ 混淆mustn’t(禁止)和needn’t(不必)
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.
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)
1. 核心区分(考试易错TOP1):
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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
❌ less修饰可数名词 ❌ fewer修饰不可数名词 ❌ 混淆三级词汇用法
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.
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.
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