词根词缀.ppt

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
词根
常用词根（中阶） 2. -sim- 相同
similar, dissimilar, similarity
simultaneous, simultaneity
其他：-electr-, -scrib-, -frig- ......
词根
常用词根（高阶） 1. -dur- 持久
during durable, duration, noห้องสมุดไป่ตู้durable
词根
常用词根（高阶） 2. -leg- 法
legal, illegal, legislation legistimate
其他：-aer-, -fibr-, -al-
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
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
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
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
副词性后缀
1. -ly: likely, immediately 2. -ward: forward, backward 3: -wise: likewise, otherwise
动词性后缀
1. -ate: accelerate, operate 2. -en: weaken, deepen 3. -ize: standardize, modernize
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
“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
词根
常用词根（初阶） 1. -equ- 相等的 equal, equable, equably, equability
equity, equitable
数字前缀
semi-: semiconductor, semicircle mono-: monopoly, monochrome bi-: bilateral, bicolor tri-: triple, triangle multi-: multination, multimedia
时间次序前缀
pre-: preface, preconception pro-: prologue fore-: forehead, foresee ex-: ex-president, ex-wife post-: postwar
尺寸前缀
mini-: miniature, miniskirt micro-: microwave, microscope macro-: macroworld, macrostructure mega-: megacity, megahertz
词根
常用词根（初阶） 2. -medi-
mediate, intermediate
medieval
其他：-centr-, -just-, -form- ......
词根
常用词根（中阶） 1. -civ- 公民
civil, civilian, civilize, recivilize, civilization