(共23张PPT)
构词法助记单词
构词法
1 合成
由两个或更多的词合成一个词,有的用连词符号“-”连接,有的直接连写在一起,还有的由分开的两个词构成。如:
man-made up-to-date blackboard bedroom bus stop post office
2 转化
由一种词性转化为另一种或几种词性。如:
⑴hand(n.)→hand(v.)
Let’s go hand in hand.
Please hand in your exercise books after class.
⑵ clean(adj.)→hand(v.)
Her room is clean and tidy.
She cleans her room every day.
⑶ taste(v.)→taste(n.)
It tastes good.
It has not much taste.
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.
3 派生
由一个词根加上前缀和(或)后缀构成另一个词。如:
⑴前缀
dis- agree 同意 disagree 不同意
cover 覆盖 discover 发现
kilo- metre 米 kilometre 千米
gramme 克 kilogramme 千克
un- fair 公平的 unfair 不公平的
limited 有限的 unlimited 无限的
⑵后缀
-able accept 接受 acceptable 可接受的
suit 合适 suitable 合适的
-tion/-ation collect 收集 collection 收集
translate 翻译 translation 翻译
-er farm 农场 farmer 农民
village 村庄 villager 村民
New Words(Ⅰ) of M7 U4
1 underground
构词法:合成 under+ground
同义词:tube subway metro
2 commonly
构词法:common (adj.) +-ly
同义词:generally
3 tube
运用:on the Tube(在地铁里) by tube(乘地铁)
4 distinction
来源:distinguish (v.)
同义词:reputation difference
5 distant
来源:distance (n.)
同义词:faraway remote
运用:at∕from a distance(在远处) remote control(遥控器)
6 boundary
同义词:border frontier
7 historic
来源:history (n.)
相关词:historian
8 transport
构词法:派生 trans-+port(n.)
trans- ①在∕到…的另一边;横贯,横穿: transatlantic
②变化: translate
相关词:transportation (n.)
9 vehicle
注意:字母h没有发音
10 choke
同义词:block
11 beneath
同义词:under below
反义词:on
12 carriage
形似词:marriage
13 comparatively
构词法:compare (v.) comparative (adj.) +-ly
运用:the comparative degree (比较级)
comparatively speaking (相比而言)
14 narrow
形近词:arrow sparrow
运用:a narrow mind (小心眼)
a narrow escape (九死一生)
15 section
同义词:area zone region district
运用:section manager (部门经理)
M-zone (动感地带)
Hong Kong Special Administrative Region(香港特别行政区)
Macao Special Administrative Region (澳门特别行政区)
16 middle
同义词:centre
辨析:
middle指时间、空间的中心或长方形物体的中心
centre指地点的中心、球体的中心,也指兴趣的中心
⑴He sat down in the ______ of the front row.
⑵Although London is British capital, it is not in the ______of the country.
⑶I was in the ______ of reading when I had a call from her.(正在…)
⑷When he was cutting an apple he had his _____ finger cut.
17 advanced
构词法:advance (v.) +-ed
运用:the advanced education (高等教育)
advanced mathematics (高等数学)
advanced ideas (先进思想)
in advance (提前=beforehand)
18 accelerate
同义词(组):speed up, promote, advance
19 pace
词组:keep pace (with…) (与…)齐头并进,跟上…
middle
center
middle
middle
20 inconvenient
构词法:派生 in-+convenient (adj.)
21 separately
构词法:派生 separate (adj.) +-ly
22 acquisition
来源: acquire (v.)
23 board
形似词:broad aboard abroad
辨析:
board Ⅰ n.木板,甲板:go on board 上船(飞机、火车等)
Ⅱ vt.上(船、车、飞机):board a train 上火车
broad adj 宽阔的
aboard Ⅰ adv.在船(飞机、车)上,上船(飞机、车):go aboard 上船(车)
Ⅱ prep.在(船、飞机、车)上
abroad adv 在国外,到国外:go abroad 出国
24 expansion
来源:expand(v.)
25 connection
构词法:connect (v.) +-tion
同义词:link contact tie
26 architect
来源: architecture (n.建筑学)
27 function
构词法:转化 vi. 起作用;运转 (=work)
n. 功能,作用
28 anti-aircraft
构词法:派生 anti-+aircraft
anti-含“反”“抗”“阻”“排斥”之意:Anti-Japanese War 抗日战争
29 minister
运用:Minister of Education 教育部长
Prime Minister 首相,总理
administration
构词法:派生 administrate (v.) +-ation
运用: MBA: Master of Business Administration 工商管理硕士
31 user-friendly
构词法:派生 user (n.)+-friendly
-friendly含“对…友好”之意:eco-friendly environment-friendly 环保的
32 anniversary
运用:
silver wedding∕ anniversary 银婚(25周年)
golden wedding∕ anniversary 金婚(50周年)
diamond wedding∕ anniversary 钻石婚(60周年)
33 effectively
构词法:派生 effect (n.) +-ive effective (adj.)+-ly
运用:cause and effect 因果
in effect=in fact=actually 实际上
come into effect 生效,实行
have an effect on… 对…有影响
34 network
构词法:合成 net+work
35 permit
同义词:allow
辨析:
allow词意较弱,含有“听任”、“默许”、“不加阻止”的意思
permit词意较强,强调“正式认可”、“批准”的意思
36 sightseeing
构词法: 派生 sightsee (v.) +-ing
运用:go sightseeing 去观光,去游览
归纳拓展:
go camping 去野营 do (some) shopping 购物
go sailing 去航海 do (some) reading 阅读
go shopping 去购物 do (some) sewing 做针线活
go fishing 去钓鱼
go swimming 去游泳
36 horrible
同义词:terrible
37 damp
反义词:dry
38 dozen
运用:①与数词或many, several等连用时,复数不加s:
a∕two dozen eggs 一∕两打鸡蛋
some dozen (of) people 约12个人
②dozens of 几十,大量,许多:
for dozens of years 好几十年以来
39 union
来源:unite (v.)
40 discount
构词法:派生 dis-+count (v.)
运用:We give (a)10﹪ discount for cash.
现金付款,我们予以九折优惠。
Work in pairs and try to guess what a word means by looking at its prefix.
Prefix Example Meaning
anti- anti-cloning
dis- disappear
in- im- il- ir- incorrect impossible illegal irresponsible
against, opposed to
not , opposite of
not, without
Prefix Example Meaning
pre- preview
pro- pro-cloning
un- unfair
re rebuild
early, before
in favor of,
supporting
not, opposite of
again
Try to guess what a word means by looking at its suffix.
Suffix Examples Meaning
-able comfortable
-ful cheerful
-ist scientist
worthy of, able to be
full of, characterized by
someone who does something
Suffix Examples Meaning
-less hopeless
-ment agreement
-ness dryness
without
indicate a state or condition
indicate a state, quality or character
Work in groups of four and try to give
more prefixes and suffixes and list
several words as examples.
Discussion
Prefix Example Meaning
de-
mal-
non-
not
decompose(分解)
maltreatment, malnutrition
non-smoker, non-alcoholic, non-profit
apart, from
badly, ill
inter-
international, interaction
between
tele-
telescope, telegram, telecommunications
far
Prefix Example Meaning
trans-
transport, translate, transnational
across
mis-
misunderstand
wrong
sub-
subtitle, subway, submarine
under
over-
overeat, overwork
too much
Some other commonly used suffixes
-al
cultural, national, original
relating to
-ion
invitation, competition, protection
action or condition of…
state of being, skill
-ship
hardship, scholarship, relationship
-dom
freedom, kingdom,
condition or state of…
of the nature of…
-ish
childish, selfish
-proof
waterproof, fireproof, soundproof
against
-en
widen, sharpen, shorten
make or become
-ward
eastward, homeward, backward
in the direction of
-like
womanlike, childlike
similar to
May you succeed!