如何判断出一个英语单词中哪个是词根、前缀、后缀? 老师，怎么判断一个单词中哪个是词根
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\u5e38\u89c1\u7684\u8bcd\u6839 1) aer, ar, \u542b\u4e49\u662f\u201c\u7a7a\u6c14\uff0c\u5927\u6c14\u201d aeroplane, aerial, 2) ag, act, ig, \u542b\u4e49\u662f\u201c\u505a\uff0c\u52a8\u4f5c\u201d active, agent, reaction, 3) alt, \u542b\u4e49\u662f\u201c\u9ad8\u201d\uff0c altitude, 4) alter, altern, altr, \u542b\u4e49\u662f\u201c\u5176\u5b83\uff0c\u53d8\u66f4\u201d alternate, 5) bio, bi, bion, \u542b\u4e49\u662f\u201c\u751f\u7269\uff0c\u751f\u547d\u201d biology, bionics(\u4eff\u751f\u5b66) 6) brev, bri, brief, \u542b\u4e49\u662f\u201c\u77ed\u201d brief, abbreviation, abridge(\u8282\u7565) 7) cap, capt, cept, cip, \u542b\u4e49\u662f\u201c\u53d6\uff0c\u83b7\u201d capture, except, concept, capacity 8) ced, ceed, cess, \u542b\u4e49\u662f\u201c\u884c\uff0c\u8ba9\u6b65\u201d proceed, succeed, excess(\u8fc7\u5ea6) 9) centr, centr, \u542b\u4e49\u662f\u201c\u4e2d\u5fc3\u201d concentrate, eccentric(\u504f\u5fc3\u7684) 10) clain, clam, \u542b\u4e49\u662f\u201c\u547c\u558a\u201d claim, proclaim, exclaim
\u8868\u793a\u5426\u5b9a\u610f\u4e49\u7684\u524d\u7f00 1)\u7eaf\u5426\u5b9a\u524d\u7f00 a-, an-, asymmetry\uff08\u4e0d\u5bf9\u79f0\uff09anhydrous\uff08\u65e0\u6c34\u7684\uff09 dis- dishonest, dislike in-, ig-, il, im, ir, incapable, inability, ignoble, impossible, immoral, illegal, irregular ne-, n-, none, neither, never non-, noesense neg-, neglect un- unable, unemployment 2)\u8868\u793a\u9519\u8bef\u7684\u610f\u4e49 male-, mal-, malfunction, maladjustment(\u5931\u8c03) mis-, mistake, mislead pseudo-, pseudonym(\u5047\u540d), pseudoscience 3)\u8868\u793a\u53cd\u52a8\u4f5c\u7684\u610f\u601d de-, defend, demodulation(\u89e3\u8c03) dis-, disarm, disconnect un-, unload, uncover 4)\u8868\u793a\u76f8\u53cd\uff0c\u76f8\u4e92\u5bf9\u7acb\u610f\u601d anti-, ant- antiknock( \u9632\u9707), antiforeign,(\u6392\u5916\u7684) contra-, contre-, contro-, contradiction, controflow(\u9006\u6d41) counter-, counterreaction, counterbalance ob-, oc-, of-, op-, object, oppose, occupy with-, withdraw, withstand
\u540d\u8bcd\u540e\u7f00 (1) \u5177\u6709\u67d0\u79cd\u804c\u4e1a\u6216\u52a8\u4f5c\u7684\u4eba 1)-an, -ain, \u8868\u793a"\u2026\u2026\u5730\u65b9\u7684\u4eba\uff0c\u7cbe\u901a\u2026\u2026\u7684\u4eba\u201dAmerican, historian, 2)-al, \u8868\u793a"\u5177\u6709\u2026\u2026\u804c\u52a1\u7684\u4eba" principal, 3)-ant,-ent, \u8868\u793a"\u2026\u2026\u8005\u201d merchant, agent, servant, student, 4)-ar, \u8868\u793a"\u2026\u2026\u7684\u4eba\u201d scholar, liar, peddler 5)-ard, -art, \u8868\u793a"\u505a\u2026\u2026\u7684\u4eba\u201dcoward, laggard, braggart(\u5938\u5f20\u8005) 6)-arian, \u8868\u793a"\u2026\u2026\u6d3e\u522b\u7684\u4eba\uff0c \u2026\u2026\u4e3b\u4e49\u7684\u4eba\u201dhumanitarian, vegetarian 7)-ary, \u8868\u793a"\u4ece\u4e8b\u2026\u2026\u7684\u4eba" secretary, missionary 8)-ant, \u8868\u793a"\u5177\u6709\u2026\u2026\u804c\u8d23\u7684\u4eba" candidate, graduate 9)-ator, \u8868\u793a"\u505a\u2026\u2026\u7684\u4eba" educator, speculator(\u6295\u673a\u8005) 10)-crat, \u8868\u793a"\u67d0\u79cd\u653f\u4f53\uff0c\u4e3b\u4e49\u7684\u652f\u6301\u8005" democrat, bureaucrat
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\u4e0b\u9762\u662f\u5b8c\u6574\u7684\u8d44\u6599\uff0chttp://tieba.baidu.com/p/211701269
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这是英语构词法中的一些术语.先说词根root
word：
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.
词根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.
前缀：prefix：在词根前加上的词缀.
一个英语单词可以分为三个部分：前缀（prefix）,词根（stem）及后缀（suffix）.单词中位于词根前面的部分就是前缀.前缀,可以改变单词的意思.
后缀：suffix
后缀是一种重要的构词法,通过后缀常常可以判断出一个词的词性.一个英语单词可以分为三个部分：前缀（prefix）,词根（stem）及后缀（suffix）.单词中位于词根前面的部分就是前缀.前缀,可以改变单词的意思.在语言学里,后缀,又称词尾,是一种后置于其他词素后的词缀.
（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.
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