资源简介

(共24张PPT)
Unit 9 Forces of nature
the Topic:
Grammar in Use
(Compound words&Comparative and superlative adverbs)
掌握复合词的构成和用法。
熟练运用副词的比较级和最高级描述灾害相关场景。
通过描述灾害的程度差异，了解不同地区灾害影响的区别。
Protecting ourselves in the earthquake
Read the text again and complete the following chart.
Causes
Effects
Know where to hide
You can better keep off danger.
Prepare _______________
It may __________________.
Take part in ________________
You can ___________________________.
an emergency kit
help save your life
school safety training
put your knowledge into practice
Activity 1
Compound words
Look at the pictures and read the sentences. Pay attention to the compound words in bold.
A snowstorm is a storm with strong winds and a lot of snow.
snow+storm=
snowstorm
A thunderstorm is a storm with thunder and lightning.
thunder+storm=
thunderstorm
An earthquake is a quake of the surface of the earth.
earth+quake=
earthquake
Compound words
一. 构成方式：由两个或多个基础单词拼接而成，例如：
sun（太阳）+ flower（花）→ sunflower（向日葵）
二. 意义：合成词的含义并非原词意义的简单叠加，而是形成新的特定概念，例如：
break（打破）+ fast（快）→ breakfast（早餐，指 “打破食”）
三. 语法功能：作为单一词汇使用，有独立的词性，例如：
1.名词：notebook、classroom
2. 动词：babysit （照看婴儿）
3. 形容词：part-time（兼职的）
Activity 2
Fill in the blanks with the given words in the box.
flashlight sandstorm aftershock supermarket
1. You’d better bring a(n) __________ if you need to walk on a dark road.
2. People living in the desert know how to keep themselves safe when a(n) __________ comes.
3. We should buy cooked food and clean water in the _____________ before snowstorm.
4. A strong __________ of the earthquake happened about 40 minutes later, and it caused more harm to the area.
flashlight
sandstorm
supermarket
aftershock
Compound words
Activity 3
Read the text and guess the meaning of the underlined words.
With fewer grasslands in some areas, the sandstorm appears more often. Sandstorms can cover farmlands, cause traffic accidents, and harm human health. People should take action in time to fight against sandstorms. Or, the sandstorm may become a worldwide problem.
grass + land = grassland
sand + storm = sandstorm
farm + land = farmland
world + wide = worldwide
(草地)
(沙尘暴)
(农田)
(全世界范围的)
Compound words
Activity 1
Comparative and superlative adverbs
Pair work. Read the conversation. Pay attention to the words in bold.
Will there be a disaster prevention training at school tomorrow
Yes. We must arrive earlier than usual.
No problem! What should we wear to school
We’d better wear sports shoes. We can perform best in sports shoes.
earlier是early的比较级
best是well的最高级
Comparative and superlative adverbs
副词的比较级和最高级
一、规则变化
（1）单音节副词和部分双音节副词直接在词尾加 -er（比较级）、-est（最高级）
例：fast → faster → fastest
（2）多音节副词（通常以 -ly 结尾）在原级前加 more（比较级）、most（最高级）
例：quickly → more quickly → most quickly
（3）特殊规则
early → 变 y 为 i + -er/-est → earlier /earliest
late → 加 - r/-st → later /latest
Comparative and superlative adverbs
二、不规则变化
原级 比较级 最高级
well better best
badly worse worst
much more most
little lest least
far farther/further farthest/furthest
Comparative and superlative adverbs
三、 副词比较等级的用法
（一）、原级比较
表示两者程度相同或不同。
1.肯定结构：as + 副词原级 + as 含义：…… 和…… 一样……
I run as fast as my brother.我跑得和我哥哥一样快。
2.否定结构：not as/so + 副词原级 + as 含义：…… 不如……
She doesn’t sing as/so well as Lucy.她唱歌不如露西好。
3.倍数表达:倍数 + as + 副词原级 + as
He jumps twice as high as me.他跳得是我的两倍高。
Comparative and superlative adverbs
（二）比较级 用于两者之间的比较
1. 基本结构：副词比较级 + than 含义： 比…… 更……
Tom swims faster than Jack. 汤姆游泳比杰克更快。
2. 程度修饰词：可以在比较级前加：much / a lot / a little / a bit / even / still / far
He works much harder than before. 他学习比以前努力得多。
3.less + 副词原级 + than含义：……不如……（程度更低）
She speaks less clearly than her sister. 她说话不如她姐姐清楚。
4.两个常用句型① 比较级 + and + 比较级含义：越来越……The wind is blowing harder and harder.风刮得越来越大。② The + 比较级…, the + 比较级…含义：越……，就越……
The harder you work, the better you learn.你越努力，学得就越好。
Comparative and superlative adverbs
（三）最高级 用于三者或三者以上比较。
结构：(the) + 副词最高级 + of /in + 范围副词最高级前的 the 常可以省略。He runs (the) fastest in our class.他在我们班跑得最快。
比较级表示最高级 用 “否定词 + 比较级” 表示 “最……”
Nobody runs faster than him. 没人跑得比他快 = 他跑得最快。
（四）一句话总结
一样…… → as + 原级 + as 更…… → 比较级 + than
最…… → (the) + 最高级 + in/of 越来越…… → 比较级 + and + 比较级
越…… 越…… → The + 比较级…, the + 比较级…
Comparative and superlative adverbs
late → ______ → ______ badly → ______ → ______
hard → ______ → ______ early → ______ → ______
well → ______ → ______
far → ______/ ______ → ______/ ______
写出下列副词的比较级和最高级形式
later
latest
worse
worst
harder
hardest
earlier
earliest
better
best
farther
further
farthest
furthest
注意：farther和farthest指物理距离的更远和最远；further和furthest指抽象程度上的延伸，表示更进一步，更深层次和最深层次。
Comparative and superlative adverbs
用括号内单词的适当形式填空
1.He arrived ________ (early) than me, but she arrived _________ (early) in the class.
2.Tom runs ____________ (quick) than Jack, but Sam runs ______________ (quick) of all.
3.The bird sings __________ (loud) than the frog, but the alarm rings __________ (loud) of all.
earlier
earliest
more quickly
most quickly
more loudly
most loudly
( ) 1. Of all the firefighters, Tom ran ______ to save the people.
A. fast
B. faster
C. fastest
D. most fast
Comparative and superlative adverbs
选择填空
C
Comparative and superlative adverbs
( ) 2.You'd better bring a ______ if you walk on a dark road at night.
A. sandstorm
B. flashlight
C. supermarket
B
Activity 2
Comparative and superlative adverbs
Complete the table and learn how to use the comparative and superlative adverbs.
Adverb Comparative Superlative
fast The forest fire spread faster than we thought. The guards ran (the) fastest to put out the fire.
carefully He drives _____________ than I do. Xia Feng checks the windows ___________________.
far We need to walk _______ to keep away from the flood. The floodwater reached _______ into the eastern part of the city after the heavy rain..
more carefully
(the) most carefully
farther
(the) farthest
Activity 3
Complete the text with the correct form of the given words.
bad far hard high terrible
On November 1st, 2012, Hurricane Sandy swept through our town. I still remember how terrible the superstorm was. We lived ________ away from the beach than most of our neighbors, and our house stood on a hillside. I thought we were safe. But the wind was blowing __________ every minute and the waves kept reaching __________. Soon, the storm arrived and took away the roof of our house. It hit the beach side of the town __________. Nearly everything there was gone. It is a _______ painful experience for me and I still can’t get over it.
farther
harder
(the) worst
higher
terribly
Comparative and superlative adverbs
句型转换
The teachers worked hard. No one worked harder than them.(改为最高级)
→ The teachers worked _________________ all.
2.He ran fast. I ran faster.(用 than 合并)
→ _______________________________________________.
hardest of
I ran faster than he did.（或I ran faster than him.）
Comparative and superlative adverbs
3.She speaks English well. She speaks English better than her brother.(改为原级比较)
→ Her brother doesn't speak English______________________.
as well as she does
We learn:
Formation and Usage of Compound Words.
Comparative and Superlative Forms of Adverbs.
We can:
Know the meaning of a compound word.
We can feel the bad effects of sandstorms .
1. make sentences with the comparative or superlative forms of 5 adverbs .
2. Describe two different natural disasters in English.
Thank you!

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