一、常见的词根
1.able, abil=able能够
ability，able，disable，enable   
2.Act=do 做
Actor, actress, activity, action, active, actual, actually, exact, react,
3.Ag=do,做
Agent, agency
4.Art=art艺术
Art, article, artist,
5.Astro, aster=star星星
Astronomy, astronaut, disaster,
6.Ball, bol=fight打架
Ballroom, balloon, symbol
7.Base=base基础
Baseball,
8.Bell, bel=war, fight战争
Rebel,
9.Cas, cid=fall落下
Casual, casually, occasion, accident,
10. cept, ceive, cip, cup=hold抓住
accept, except, receive, receipt, principal,
11.cap=head头
Captain, capital,
12.Cycle, circle=circle圈
Bicycle, recycle, circus,
13.Dic=write写
Diction, prediction,
14.Doub=double双
Double, doubt
15.Duct, duc=say说
Educate, education, reduce, conduct,
16.Fall, fail, fault=err错误
17.Fer=catch捉住
Offer, infer, different, difference, prefer, suffer,
18.Flu=flow流动
Fluent, fluency, influence,
19.Fore, fort=strong
Force, forceful, effort, comfortable, discomfortable
20.Form=shape形状
Formal, inform, information, reform, transform, uniform, perform, performance,
21.Frig, friger=cold冷
Refrigerator
22.Fus,=pour倒
Confuse, confusion, refuse,
23.Gest, gister=carry, bring搬运
Suggest, suggestion,
24.Grad=step, grade阶段
Grade, graduate, gradual, centigrade,
25.Graph, gram=write,写
Photograph, telegraph, program, diagram
26. grat, gree=pleasing,满意
Gratitude, grateful, grace, agreement, disagree,
27.Gress=go, walk走
Progress,
28. Habit=do well做
Habit,
29. Hap=chance机会
Perhaps, happen, happy, happiness,
30.Lect, lig=choose, gather,收集
Collect, collection, elect, neglect, select,
31. Long=leng长度
Belong, length,
32.Man, manu=hand手
Manage, manager, maintain,
33.Mark=sigh, 标记
Marked, remark, landmark, bookmark,
34.Memor=memory记忆
Memory, memorize, remember, 
35.Ment=mind介意，想法
mention, comment, remind
36.Miss, mit=send, cast投送
Dismiss, promise,
37.Mod=mode, manner举止
Modest, model, modern
38.Neg=deny否定
Neglect, negative,
39.Part, port=part, divide,分割
Apartment, depart, department, partner,
40.Pass=pass through通过
Passage, passenger, passport,
41.Pend, pens=hang悬挂
Depend, independent, spend,
42.Per=try尝试
Experiment, experience,
43.Plat=flat平坦
Plate, platform,
44.Fly=fold折叠
Apply, reply, supply,
45.Point, punct=point, make sharp, 尖，尖端
pointed, pointer, appoint, appointment, disappoint, 
46.Police=state, city城市，地区，国家
Police, policy, politics,
47.Popul, publ=people人们
Population, popular, public, publish,
48.Port=carry运送
export, support, transport,
49.Press=press按压
Pressure, compress, express, expression, impressive,
50.Prim=first, chief,第一，主要
Primary, primer,
51.Pris, =take拿取
Surprise,
52.Quest, quir, quis, quer=seek, search,搜索
Quest, inquest, question, request, conquer,
53.Quiet, qui=still 安静
Quiet, quietly, quickly
54.Quit=free自由
Quit,
55.Sal=salt盐
Salt, salty, salad, salary,
56.Sci=know知道
Science, scientist, scientific,
57.Sence, sent=feel感觉
Sense, sensible, nonsense,
58.Serv=serve, keep保持
Service, servant, deserve, observe,
59.Sid=sit,坐
active词根词缀President, consider,
60.Sigh=mark,标记
Signal, assign, assignment, design,
61.Sist-stand站立
Assist, assistant, consist, exist,
62.Sum,summ=add up添加
Sum, summit, summary, summarize,
63.Tele=far远的
Telegraph, telephone, television,
二. 常见的前缀
1.表示否定意义的前缀
1)纯否定前缀
dis- ,dishonest, dislike
im-, ir-,impossible, irregular
ne-, n-, none, neither, never
non-, nonsense
neg-, neglect
un- unable, unemployment
2)表示错误的意义
mis-, mistake, mislead,
3)表示反动作的意思
de-, defend,
un-, unload, uncover
2. 表示空间位置，方向关系的前缀
a-在…之上,向…”aboard, aside, above,
en-, 表示“在内，进入”encage, enjoy, enrich,
ex-, 表示“外部，外”exit, expand, export, except,
fore- “在前面”forehead, foreground,
in-, il-, im-(用于b,m,p之前), ir-, 表示“向内，在内，背于”inside, import
inter-,表示“在……间，相互”international, interaction, internet
intro-, 表示“向内，在内，内侧”introduce, introduction
mid-, 表示“中，中间”midnight,
out-, 表示“在上面，在外部，在外”outline, outside, outward
over-, 表示“在上面，在外部，向上”overlook, overhead, overboard
pre-, 表示"在前”在前面”prefix, preface, prepare
pro-, 表示“在前，向前”progress, proceed,
sub-, 表示“在下面，下”subway,
super-, sur-, 表示“在…..之上” surface, supermarket, superman,
trans-, 表示“移上，转上，在那一边”translate, transform,
under-, 表示“在…..下面，下的”underline, underground, underwater
up-, 表示“向上，向上面，在上”upward, uphill(上坡)upstairs,
3. 表示时间，序列关系的前缀
fore-, 表示“在前面，先前，前面” forecast, foretell