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(共12张PPT)
Unit 7 When Disaster Strikes
World Building
When Disaster Strikes
Learning Objectives
To master the common ways of word building.
To remember and use English words quickly by word building.
When Disaster Strikes
Oh, we should also move the flowerpots off the balcony so they don’t blow off and hurt passersby.
Do you feel powerless at the thought of natural disasters
We can also have an earthquake preparation workshop.
We can clean the streets and help replant some of the trees that were uprooted.
When Disaster Strikes
Group 1
flowerpots
passersby
earthquake
workshop
Group 2
replant
uprooted
powerless
natural
preparation
Derivatives 派生词
compound word 合成词
When Disaster Strikes
flowerpot
passersby
earthquake
workshop
flower花 +pot锅，容器
passers 过路人 + by
earth地球 + quake震动
work工作 + shop场所, 商店
花盆
经过者，过路人
地震
车间，工作坊
Compound words are formed by two independent words.
(合成词由两个独立的词合并构成）
When Disaster Strikes
replant
uprooted
powerless
preparation
re重复, 再 + plant 种植
up向上 + root 根茎 + ed
power力量 + less无，没有
prepar准备 + ation（名词后缀）
再种，再植
连根拔起的
无力的
准备
Derivatives are formed by a root adding s prefix, or a suffix.
(派生词是由词根加前缀或后缀构成）
When Disaster Strikes
前缀如un-, im-, anti-, pre-, mis-, dis-等一般用来改变词义, 如
important
plant
root
unimportant 不重要的
replant 重新种植
uproot 连根拔起
重要的
种植
根部
生根
When Disaster Strikes
前缀如un-, im-, anti-, pre-, mis-, dis-一般用来改变词义, 如
lead
appear
correct
mislead 领错
disappear 消失
incorrect 不正确的
带领
出现
正确的
When Disaster Strikes
后缀通常会改变单词的词性, 构成意义相近的其他词性。如：
-ence
-(e)r/ -or
-ese
某地人
从事某事的人
-ess
雌性
-less
-ian
-ist
专业人员
精通……的人
-ment
性质；状态
不, 从
-tion
-al
-able
有能力的
…
动作；过程
When Disaster Strikes
differ
v.不同于
difference
n. 区别
write
v. 写
writer
n. 作家
act
v. 表演
actress
n. 女演员
power
n. 力量
powerless
adj. 无力的
nature
n. 自然
natural
adj.自然的
reason
n. 道理
reasonable
adj. 有道理的
translate
v. 翻译
translation
n. 翻译
When Disaster Strikes
Summary
1. Ways of word formation: synthesis / compound word, derivative
2. Common prefix: un-, im-, anti-, pre-
3. Common suffix: -tion, -er, -al, -ful, -less
Thank you!
Unit 7 When Disaster Strikes

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