词汇基础篇——构词法（前缀，后缀，词根）
考研英语常用前缀
（1）. 表示“否定”前缀
im-
moral –immoral
possible – impossible
in-
direct – indirect
correct – incorrect
un-
certain – uncertain
fortunate – unfortunate
ir-
regular – irregular
responsible – irresponsible
il-
legal - illgal
literate – illiterate
non-
smoker- non-smoker
n – nonn
dis-
advantage – disadvantage
agree – disagree
honest – dishonest
mis-
fortune – misfortune
understand – misunderstand
de-
code – decode
value – devalue
ab-
normal — abnormal
u — abu
（2）表示“数量”前缀
mi-
circle – micircle
final – mifinal
hemi-
hemi – hemisphere
mono-
plane – monoplane
tone – monotone
uni-
form – uniform
directional – unidirectional
bi-
lingual – bilingual
cycle – bicycle
tri-
angular – triangular
cycle – tricycle
mini-
bus – minibus
skirt – miniskirt
multi-
purpo – multipurpo
national – multinational
poly-
centric – polycentric
syllabic – polysyllabic
super-
marker – supermarket
natural – supernatural
extra-
curricular – extracurricular
ordinary – extraordinary
ultra-
modern – ultramodern
sound – ultrasound
macro-
economics – macroeconomics
structure – macrostructure
micro-
computer – microcomputer
electronics – microelectronics
centi-
grade – centigrade
meter – centimeter
kilo-
gram – kilogram
meter – kilometer
（3）表示“空间位置”前缀
over-
head – overhead
time – overtime
under-
develop – underdevelop
a – undera
sub-
divide – subdivide
ction – subction
infra-
structure – infrastructure飞黄腾达什么意思
out-
door – outdoor
live – outlive
intra-
city – intracity
department – intra-department
inter-
change – interchange
national – international
mid- 别开头的成语
day – midday
night – midnight
trans-
Atlantic – transatlantic
plant – transplant
cross-
country – cross-country
breed – crossbreed
（4）“天柱山风景区图片时间顺序”前缀
ex-
minister – ex-minister
wife – ex-wife
port-export
pre-
war- prewar
school - preschool
post-
graduate – postgraduate
war – postwar
（东三省旅游攻略5）表示“共同”四季的诗句或用来“加强语气”
co-
author – coauthor
exist – coexist
col-
location – collocation
com-
press – compress
passion – compassion
con-
centric – concentric
federation – confederation
cor-
relate – correlate
respond – correspond
(6) 动词前缀
be-
friend – befriend
little – belittle
em-
body – embody
power – empower
en-
danger – endanger
large – enlarge
清淡饮食有哪些菜谱
（7）其他常用前缀：
pro-
America – pro-America
pro – proceed
anti-
war – antiwar
smoking – antismoking
contra-
diction – contradiction
counter-
act – counteract
aero-
plane - aeroplane
积极分子培养考察意见 space – aerospace
auto-
biography – autobiography
criticism – autocriticism
lf-
employed – lf-employed
taught – lf-taught
bio -
喝黑茶有什么好处chemistry – biochemistry
biology
