词根词缀ppt课件.ppt

1,词汇篇 ,词根 词缀,2,“词根”“词缀”是什么？,单词由词根和词缀构成 词缀又分为前缀和后缀 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,3,词根,常用词根（初阶） 1. -equ- 相等的 equal, equable, equably, equability equity, equitable,4,词根,常用词根（初阶） 2. -medi- mediate, intermediate medieval 其他：-centr-, -just-, -form- ......,5,词根,常用词根（中阶） 1. -civ- 公民 civil, civilian, civilize, recivilize, civilization,6,词根,常用词根（中阶） 2. -sim- 相同 similar, dissimilar, similarity simultaneous, simultaneity 其他：-electr-, -scrib-, -frig- ......,7,词根,常用词根（高阶） 1. -dur- 持久 during durable, duration, nondurable,8,词根,常用词根（高阶） 2. -leg- 法 legal, illegal, legislation legistimate 其他：-aer-, -fibr-, -al-,9,前缀,改变词义的前缀 有哪些呢？ 表否定 表数字 表时间和次序 表尺寸 其他,10,否定前缀 常见的11种 规律 im il ir、,dis-: disadvantage, disagree in-: incorrect, inaccurate im-: impossible, impolite il-: illegal, illiterate ir-: irregual, irresistable un-: unfinished, undoubtedly non: nonessential, nonexistence mis-: misunderstand, misfortune dis-: disappear, disconnect anti-: antisocial counter-: counteract,11,数字前缀,semi-: semiconductor, semicircle mono-: monopoly, monochrome bi-: bilateral, bicolor tri-: triple, triangle multi-: multination, multimedia,12,时间次序前缀,pre-: preface, preconception pro-: prologue fore-: forehead, foresee ex-: ex-president, ex-wife post-: postwar,13,尺寸前缀,mini-: miniature, miniskirt micro-: microwave, microscope macro-: macroworld, macrostructure mega-: megacity, megahertz,14,常见的四种后缀,1. 名词性后缀 2. 形容词性后缀 3. 副词性后缀 4. 动词性后缀,15,名词性后缀,1. -ion: occasion, division 2. -ist: specialist, biologist 3. -ment: experiment, measurement 4. -ness: darkness, hardness 5. -cy: infancy, accuracy 6. -ency/ancy: tendency, emegency, constancy, pregnancy 7. -logy: psychology, histology 8. -ty: capacity, similarity,16,形容词性后缀,1. -able: acceptable, available 2. -al: vocal, captial 3. -ant: significant, resistant 4. -ar: regular, muscular 5.-ary: ordinary, anniversary 6. -ent: consistent, efficient 7. -ful: useful, successful,17,副词性后缀,1. -ly: likely, immediately 2. -ward: forward, backward 3: -wise: likewise, otherwise,18,动词性后缀,1. -ate: accelerate, operate 2. -en: weaken, deepen 3. -ize: standardize, modernize,19,根据后缀辨别下列单词的词性,1. scientist 2. singer 3. conversation 4. beautiful 5. loudly 6. advertisement 7. government 8. yearly 9. instruction 10. careful 11. lively 12. safety 13. national 14. traditional 15. illness 16. wonderful 17. competition 18. information 19. successful 20. natural 21. usually 22. lovely 23. really 24. friendly,。