文档介绍：英语单词构成有其规律,很好的掌握了构词规律,才可以很好、很快的、准确的记忆单词。英语单词构词法的核心部分,在于词根,词的意义主要是由组成单词的词根体现出来的。词根可以单独构成词,也可以彼此组合成词,通过前缀后缀来改变单词的词性和意义。(词根和词缀叫构词语素)也就是说,单词一般由三部分组成:词根、前缀和后缀。词根决定单词意思,前缀改变单词词义,后缀决定单词词性。
常见的词根
1) aer, ar, 含义是“空气,大气” aeroplane, aerial,
2) ag, act, ig, 含义是“做,动作” active, agent, reaction,
3)  alt, 含义是“高”, altitude,
4) alter, altern, altr, 含义是“其它,变更” alternate,
5) bio, bi, bion, 含义是“生物,生命” biology, bionics(仿生学)
6)brev, bri, brief, 含义是“短” brief, abbreviation, abridge(节略)
7)cap, capt, cept, cip, 含义是“取,获” capture, except, concept, capacity
8)ced, ceed, cess, 含义是“行,让步” proceed, eed, excess(过度)
9) centr, centr, 含义是“中心” concentrate, eccentric(偏心的)
10)clain, clam, 含义是“呼喊” claim, proclaim, exclaim
11)  clos, clud, 含义是“闭合” conclude, enclose, include
12)  col, cult, 含义是“耕耘” colony, cultivate, agriculture
13)  cor, cord, 含义是“心” cordial, record, accord
14)  curr, cur, cour, 含义是“跑,动作” current, occur, concurrence(同时发生)
15)  dic, dict, 含义是“说,示” dictate, edit, indicate, predict
16)  doc, doct, 含义是“教” doctor, document
17)  duc, duct含义是“引导,传导” introduce, produce, conduct, deduct( 推论)
18)  fact, fac, fect, dic, dit, 含义是“做,创造” factory, effect, profit, faculty, perfect
19)  fend, fens, 含义是“打,击” defence, offence
20)  fer, 含义是“搬运,移转” ferry, transfer, defer(迟延)
21)  fin, finit, 含义是“终,极” final, finish, confine
22)  firm, 含义是“坚固” firm, confirm, affirm(断定)
23)  fix, 含义