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(共27张PPT)
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Afternoon!
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What is your biggest difficulty in learning English
What is your biggest difficulty in learning English
Vocabulary
How to remember word more efficiently
After so many years of learning English, have you found some easy ways to
double your vocabulary
Use prefixes and suffixes
Or you can clone it
Word Formation
——Derivation
构词法—派生词
Derivation (派生词)
root
词根
prefix
前缀
suffix
后缀
+
+
unhappiness
the beginning of a word
the end of a word
Prefix
(前缀)
Do you agree or disagree
It is illegal to steal
It is considered impolite to ask a person how much he earns.
These data are incomplete so we still need to collect more.
This question is so difficult that I am unable to answer it.
Read the following sentences and try to understand the words' meanings in bold.
Tip: Guess the meanings of
the letters in red.
Task 1
Negative prefixes
Prefix Meaning Example
il-
in-
im-
dis-
un-
不
incorrect
illegal
impossible
dislike
uncertain
不喜欢
不正确的
不合法的
不可能的
不确定的
correct
legal
possible
like
certain
mis-
misunderstand
误解
understand
Facing a lot of affairs, you need to make a plan to prearrange them.
This bridge is broken so we need to rebuild it.
Read the following sentences and try to understand the words' meanings in bold.
Task 2
Tip: Guess the meanings of
the letters in red.
Other prefixes
Prefix Meaning Example
pre-
re-
在...之前
再
preview
review
预习
复习
view
view
suffix
(后缀)
Rule Suffix Example adj.＋suffix →n.
v.＋suffix→n.
Noun suffixes
teach →
difficult →
weak →
perform →
improve →
pollute →
teacher
difficulty
weakness
performance
improvement
pollution
老师
困难
虚弱
表演
改进
污染
-ness
-y/-ty/-ity
-er/-or
-ance/-ence
-ment
-tion/-sion
Rule Suffix Example v.＋suffix →adj. n.＋suffix →adj.
Adjective suffixes
comfort →
differ →
music →
create →
use →
use →
comfortable
different
musical
creative
useless
useful
舒适的
不同的
音乐的
创造性的
无用的
有用的
danger →
dangerous
危险的
-able/-ible
-ant/-ent
-ic/-al/-ical
-ive
-ous
-ful
-less
Suffix Rule Example adj.＋ly →adv.
Adverb suffixes
happy →
slow →
careful →
busy →
possible →
simple→
happily
slowly
carefully
busily
possibly
simply
开心地
缓慢地
仔细地
忙碌地
可能地
简单地
一般情况直接加
-ly
“辅音字母＋y”结尾，改“y”为“i”，再加-ly
以“-le”结尾，去“e”，再加“y”
independence
in
depend
ence
prefix(前缀)
root (词根)
suffix(后缀)
Prefix: a group of letters that is added to the beginning of a word to change its meaning.
Suffix: a letter or a group of letters added to the end of a word to make a different word.
agree
dis
ment
prefix
suffix
change the meaning of a word
change the part of speech of a word
V.
n.
perfect
imperfection
perfection
imperfect
word
prefix
suffix
['prif ks]
['s f ks]
前缀
后缀
Prefixes may change the meanings of words.
Suffixes may change
the parts of speech
(词性) of words
1. Chinese New Year is a _________ (celebrate) marking the end of the winter season and the beginning of spring.（2020年全国卷II）
2. Filled with _______ (curious), the artist packed his bags and left.（2020年全国卷III）
3. Then, handle the most important tasks first so you’ll feel a real sense of __________ (achieve).（2016年全国卷II）
celebration
curiosity
achievement
5. The _________ (beauty) long branches covered with pink-colored buds (蓓蕾) make fantastic decorations.（2020年全国卷II）
6. School uniforms are __________ (tradition) in Britain, but some schools are starting to get rid of them.（2019年浙江卷）
7. The obvious one is money; eating out once or twice a week may be __________ (afford) but doing this most days adds up.（2018年浙江卷）
beautiful
traditional
affordable
7. Landing on the moon’s far side is ________ (extreme) challenging.（2020年全国卷I）
8. As the small boat moved ______ (gentle) along the river he was left speechless by the mountains being silently reflected in the water. (2020年全国卷Ⅲ)
9. ________ (certain) during the holiday period, this plant is a must.（2020年全国卷II）
extremely
gently
Certainly
不同词性在句中的不同用法：
作主语、及物动词或者介词的宾语，一般用____。
作谓语、动词不定式中，一般用____。
作定语、表语或补语，一般用______。
修饰动词、形容词或整个句子等作状语，一般用____。
名词
动词
形容词
副词
A (1)_______ (nation) hi-tech exhibition is being held from February 26 to March 6. It showcases China’s hi-tech successes achieved under the 863 Programme. The programme has led to several breakthroughs in science and technology.
At the exhibition, (2)______ (visit) can learn more about important (3)___________ (achieve) in fields such as biology, bioengineering and medicine, (4)_____________ (communicate) and computer
engineering.
national
visitors
achievements
communication
Step 5: Practical application
Many of the most outstanding new breakthroughs have come in the field of genetics. One of the stars at the exhibition is a small mouse with a human ear grown on its back. The technology may (5)______ (able) doctors to (6)______ (store) human organs in the near future.
The 863 Programme and the new technologies have directly and (7)________ (directly) helped China’s (8)________ (economy) construction and (9)___________ (strength) its social (10)___________ (develop).
enable
restore
indirectly
economic
strengthened
development
Homework
Find the words related to today's word formation in Book 1 and Book 2, then try to remember them.
THANKS

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