pos = put 放置
pose, position, expose, exposure, compose, composition, propose, proposal, oppose,
opposition, impose, dispose, disposal, preposition
tract = draw 拉，抽，引
tractor, attract, attraction, attractive, distract, subtract, contract, abstract, drag, draw, straight, straighten, stretch
sec, sequ = follow 跟随
second, secondary, sequence, subsequent, consequence, consequently
vid, vis, vey, vy = see 看
visible, vision, visibility, invisible, visual, video, videophone, revise, revision, supervise, supervision, evident, evidence, visit
spect=look 看
spectator, spectacle, spectacular, prospect, inspect, inspection, expect, expectation, respect, respectable, respectful, respective, respected, suspect, suspicion, specific, despite
mob, mov, mot = move动
mobile, mobility, mobilize, automobile, motion, motive, motivate, motivation, motor, move, promote, promotion, emote, remote
ced, ceed, cess , gress = go, walk 行走
precede, proceed, procedure, process, exceed, excess, excessive, succeed, success, successful, succession, successive, successor, access, accessible, progress, congress, regress, aggressive
rupt=break破
bankrupt, interrupt, corrupt, disrupt, erupt
mini, min = small, little 小
miniskirt, minimize, minimum, minus, minute, minority, diminish
scrib, scrip 写，记，抄
describe, description, script, manuscript, prescribe, prescription
dict, dic = say 言，说
diction, dictionary, contradict, dictate, dictation, dictator, predict, prediction, predictable, indicate, verdict
miss, mit = send 投，送，发
mission, missile, dismiss, dismissal, transmit, transmission, emit, emission, promise, compromise, committee, commission
port = carry 拿，带，运
portable, import, export, transport, report, support
leg, legis 法
legal, legalize, illegal, legislate, legislation, legislature
solu, solv 洗，溶解
solution, solve, resolve, resolution, dissolve
press 压
impress, impression, express, suppress, depress
viv, vit=live活：
live, living, lively, survive, livelihood, alive, revive, vivid, vital, vitamin
count=number: 数
account, accountant, discount, number, numeral, numerous, innumerable
ag=act 行动，做：
action, exactly, react, interact, transact, radioactive, agent, agenda, agency,
fac(t)=make做，作，制造：
facility, factory, faculty, affect, defect, infect, perfect, efficient, fiction, artificial, proficiency, feasible
sign=mark记号，信号：
remark, signal, signature, design, designate, significance, resign
du, doub, coup=two 二：
dual, double, doubtful, couple, dubious, duplicate, dual
spher=ball球：
balloon, ballot, hemisphere, atmosphere
popul, publ=people人：
popular, public, publicity, republic, publish, republican, population,
men, min=mind心灵，精神：
mind, remind, mention, mental, comment, memory, memorial, remember, commemorate
struct=build建造：
construct, instruct, obstruct, destruction, destroy
fund, found=base基础：
basement, basis, foundation, profound, fund, refund, fundamental
part=divide分，分开：
dividend, individual, particle, participate, particular, partner, apart, counterpart, depart, impartial, department, party, apartment, compartment
pend,pens-hang悬挂：
dependent, independence, append, appendix, suspend, pension
duc(t)=lead引导：
conduct, deduct, misconduct, educate, induce, introduce, produce, reduce,
oper=work工作：
operate, cooperate, opera
ven,vent=come来：
venture, adventure, avenue, convention, invent, eventually, prevent, intervene
voc,vok=claim呼喊，叫喊，声音：
proclaim, reclaim, exclaim, advocate, provoke, vocal, voice,
sect=cut切，割：
section, segment, intersection, sector
grat, grac, gree=please高兴，感激：
grace, grateful, gratitude, congratulation, agree, agreeable, greet, pleasure, pleasant, disagree
vail, val=worth价值：
worth, worthy, worthwhile, available, prevail, value, valid, validity, valve, evaluate, equivalent
pel, peal, puls=drive驱动：
appeal, compel, compulsion, compulsory, propel, pulse, impulse