词根词缀ppt课件
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英语词根词缀PPT资料(正式版)
bi-两、二 ❖ biweekly ❖ 双周刊 ❖ bicolour ❖ 两色的 ❖ bicycle ❖ 自行车
猜猜下列词的意思
beneficial =bene- +fi +-cial 有利的,有帮助的,有用的
bilingual =bi-+lingu +-al 两种语言的
bimonthly =bi-+monthly 双月刊
by- 旁、侧、非正式、副 ❖ by-product ❖ 副产品 ❖ by-effect ❖ 副作用 ❖ by-business ❖ 副业
circum- 周围、环绕 ❖ circumpolar ❖ 在两极周围的,极地附近的 ❖ circumlunar
猜猜下列词的意思
bywork =by+work 业余工作
③ The UFO is invisible at night. ④ I’d like to see the experiment
visually.
接着我们来学习一些前缀:
ante- 前、先 ❖ anteport ❖ 前港,外港 ❖ antecessor ❖ 先行者,先驱者
anti- 反对、相反、防止 ❖ antiwar ❖ 反战的 ❖ antiforeign ❖ 反外的,排外的
你还可以…词后缀去记忆
painful fearful beautiful careful hopeful peaceful
…
ful
所有的单词 都连成网!
后缀决定大多词的词性:
① The pilot reported bad visibility to the airport.
② She couldn't visualize flying through space.
猜猜下列词的意思
beneficial =bene- +fi +-cial 有利的,有帮助的,有用的
bilingual =bi-+lingu +-al 两种语言的
bimonthly =bi-+monthly 双月刊
by- 旁、侧、非正式、副 ❖ by-product ❖ 副产品 ❖ by-effect ❖ 副作用 ❖ by-business ❖ 副业
circum- 周围、环绕 ❖ circumpolar ❖ 在两极周围的,极地附近的 ❖ circumlunar
猜猜下列词的意思
bywork =by+work 业余工作
③ The UFO is invisible at night. ④ I’d like to see the experiment
visually.
接着我们来学习一些前缀:
ante- 前、先 ❖ anteport ❖ 前港,外港 ❖ antecessor ❖ 先行者,先驱者
anti- 反对、相反、防止 ❖ antiwar ❖ 反战的 ❖ antiforeign ❖ 反外的,排外的
你还可以…词后缀去记忆
painful fearful beautiful careful hopeful peaceful
…
ful
所有的单词 都连成网!
后缀决定大多词的词性:
① The pilot reported bad visibility to the airport.
② She couldn't visualize flying through space.
英语词根词缀学习PPT幻灯片
34
imm: dipl=dulp=dub 豁免,免除 exempt 外交官享有外交豁免权
diplomacy exemption
35
dipl=dupl=dub=double diplomat=外交家=双面人 A ~ is someone who can tell you to go
straight to the hell, and that you actually look forward to a trip. diploma certificate (certify) duplicate: (v)=复制;(n)=一式两份
submerge: sub=下面
be submerged in ... = be engaged in ... saturate=饱和 satisfy
19
immerse immense 巨大的 vast/enormous
tremendous
20
over-: a/b
Over = overawe (v.): awe=敬畏 awful awesome 威慑 overcome=克服(你是弱者) conquer=征服(你是强者)
32
in-
a: 在什么的里面
(当后面跟着的部分并非是独立单词时) inanity (n.): 一个人在家里空虚
vanity 虚荣 va- vacant vacancy a vacant parking place b: 向下(当…是独立单词时)
invalidity; invalid (a): 无用的,无效的(药) inconvenient
9
原则三:发音相近,意思也相近
10
前缀-Prefix (向上↑): up-: ↑
uphold (v.) upsurge surge uproar
imm: dipl=dulp=dub 豁免,免除 exempt 外交官享有外交豁免权
diplomacy exemption
35
dipl=dupl=dub=double diplomat=外交家=双面人 A ~ is someone who can tell you to go
straight to the hell, and that you actually look forward to a trip. diploma certificate (certify) duplicate: (v)=复制;(n)=一式两份
submerge: sub=下面
be submerged in ... = be engaged in ... saturate=饱和 satisfy
19
immerse immense 巨大的 vast/enormous
tremendous
20
over-: a/b
Over = overawe (v.): awe=敬畏 awful awesome 威慑 overcome=克服(你是弱者) conquer=征服(你是强者)
32
in-
a: 在什么的里面
(当后面跟着的部分并非是独立单词时) inanity (n.): 一个人在家里空虚
vanity 虚荣 va- vacant vacancy a vacant parking place b: 向下(当…是独立单词时)
invalidity; invalid (a): 无用的,无效的(药) inconvenient
9
原则三:发音相近,意思也相近
10
前缀-Prefix (向上↑): up-: ↑
uphold (v.) upsurge surge uproar
词汇扩展词根词缀汇总PPT课件
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20. Interact
• Act • Interact • React • Transact
• Action • Interaction • Reaction • Transaction
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21. Inter: between among • Interact • Interchange • Interlace 交织,组合 • Interplay • Interview • Intertwine 纠缠,交织 • Interweave 交织 • Interpret • Intersperse 点缀 • Intermit 暂停,中止,间歇
• sight 同根词 • Eyesight • Foresight • Insight • Hindsight • Oversight
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28. volunteer
• Volunteer n. • Volunteer v. • Voluntar y adj.
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29. identical
第14页/共112页
13. Press
• Compress • Depress • Express • Impress • Oppress • Press • Repress • Suppress
• Compression • Depression • Expression • Impression • Oppression • Pressure • Repression • Suppression
• Separate from • Recover from • Discourage from • Frustrate from • Isolate from • Alienate from • Detach from • Deviate from • Depart from
20. Interact
• Act • Interact • React • Transact
• Action • Interaction • Reaction • Transaction
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21. Inter: between among • Interact • Interchange • Interlace 交织,组合 • Interplay • Interview • Intertwine 纠缠,交织 • Interweave 交织 • Interpret • Intersperse 点缀 • Intermit 暂停,中止,间歇
• sight 同根词 • Eyesight • Foresight • Insight • Hindsight • Oversight
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28. volunteer
• Volunteer n. • Volunteer v. • Voluntar y adj.
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29. identical
第14页/共112页
13. Press
• Compress • Depress • Express • Impress • Oppress • Press • Repress • Suppress
• Compression • Depression • Expression • Impression • Oppression • Pressure • Repression • Suppression
• Separate from • Recover from • Discourage from • Frustrate from • Isolate from • Alienate from • Detach from • Deviate from • Depart from
英语词根词缀(课堂PPT)
impel inter- international interactive interchange sub- subway subsequent substandard subtitle tele- telephone telescope telecommunication trans- transparent transport transplant translate
•
-ment movement government eቤተ መጻሕፍቲ ባይዱcouragement
•
-ness kindness carelessness
•
-ship
friendship leadership relationship
•
-ure
exposure failure measure leisure pleasure
•
-ibility possibility responsibility
•
-age
marriage shortage carriage
•
-al
arrival refusal revival survival
•
-ance acceptance importance distance ignorance
•
-ese Chinese Taiwanese Cantonese
•
-ic heroic poetic economic
•
-some troublesome handsome quarrelsome
4
(2)表示“充满或缺乏”
-free duty-free care-free worry-free
• (3)表示“类似” -ish childish stylish greenish
•
-ment movement government eቤተ መጻሕፍቲ ባይዱcouragement
•
-ness kindness carelessness
•
-ship
friendship leadership relationship
•
-ure
exposure failure measure leisure pleasure
•
-ibility possibility responsibility
•
-age
marriage shortage carriage
•
-al
arrival refusal revival survival
•
-ance acceptance importance distance ignorance
•
-ese Chinese Taiwanese Cantonese
•
-ic heroic poetic economic
•
-some troublesome handsome quarrelsome
4
(2)表示“充满或缺乏”
-free duty-free care-free worry-free
• (3)表示“类似” -ish childish stylish greenish
《词根词缀大全》课件
练习推测单词含义
通过已知的词根和词缀推测新单词的含义,提高词汇推测能力。
阅读中实践
在阅读英文文章时,尝试运用所学的词根和词缀知识来理解生词, 加深记忆。
02
常见词根
Chapter
词根:act(行动)
总结词
表示行动、行为
详细描述
词根act来源于拉丁语,表示行动、行为。带有这个词根的单词通常与行动、行 为有关,例如activate(激活)、action(行动)、react(反应)等。
详细描述
词根词缀是构成英语单词的基础元素,通过 学习和掌握常见的词根词缀,可以快速理解 单词的构成和含义,从而更轻松地记忆单词 。
推测单词意思
总结词
遇到不认识的单词时,可以通过分析其词根 词缀来推测其大致意思。
详细描述
很多英语单词的含义可以通过其词根词缀进 行推测,掌握词根词缀可以帮助我们更好地 理解单词的含义,提高阅读和理解的效率。
《词根词缀大全》PPT课件
目录
• 词根词缀简介 • 常见词根 • 常见词缀 • 词根词缀应用 • 练习与挑战 • 总结与展望
01
词根词缀简介
Chapter
什么是词根词缀
词根
构成单词的基本部分,表示该单 词的核心意义。
词缀
附加在词根上,用来改变单词的 词性、时态、数量等。
词根词缀的重要性
提高词汇量
加强实际运用和巩固所学知识
学生将通过大量的阅读、写作和口语练习来加强 所学知识的实际运用,巩固对词根词缀的理解和 记忆。
参与线上交流和学习活动
学生计划参加更多的线上交流和学习活动,与其 他学习者分享学习心得和经验,共同进步。
THANKS
感谢观看
提高阅读速度
通过已知的词根和词缀推测新单词的含义,提高词汇推测能力。
阅读中实践
在阅读英文文章时,尝试运用所学的词根和词缀知识来理解生词, 加深记忆。
02
常见词根
Chapter
词根:act(行动)
总结词
表示行动、行为
详细描述
词根act来源于拉丁语,表示行动、行为。带有这个词根的单词通常与行动、行 为有关,例如activate(激活)、action(行动)、react(反应)等。
详细描述
词根词缀是构成英语单词的基础元素,通过 学习和掌握常见的词根词缀,可以快速理解 单词的构成和含义,从而更轻松地记忆单词 。
推测单词意思
总结词
遇到不认识的单词时,可以通过分析其词根 词缀来推测其大致意思。
详细描述
很多英语单词的含义可以通过其词根词缀进 行推测,掌握词根词缀可以帮助我们更好地 理解单词的含义,提高阅读和理解的效率。
《词根词缀大全》PPT课件
目录
• 词根词缀简介 • 常见词根 • 常见词缀 • 词根词缀应用 • 练习与挑战 • 总结与展望
01
词根词缀简介
Chapter
什么是词根词缀
词根
构成单词的基本部分,表示该单 词的核心意义。
词缀
附加在词根上,用来改变单词的 词性、时态、数量等。
词根词缀的重要性
提高词汇量
加强实际运用和巩固所学知识
学生将通过大量的阅读、写作和口语练习来加强 所学知识的实际运用,巩固对词根词缀的理解和 记忆。
参与线上交流和学习活动
学生计划参加更多的线上交流和学习活动,与其 他学习者分享学习心得和经验,共同进步。
THANKS
感谢观看
提高阅读速度
英语词汇方法词根词缀精品PPT课件
Lesson 1 词汇学习策略之
Roo词t 根an词d 缀affix
Our task
Listen to three classic English songs and learn new words from them
Summarize a strategy to learn new words called root and affix
词根 tain 表示"拿住"
attain v.获得 contain v.包含
entertain v.娱乐,招待
detain v.耽搁
maintain obtain retain sustain
v.保持 v.获得 v.恢复 v.持续,支持
词根 pel 表示"推,驱动" compel v.强迫 dispel v.驱散 expel v.驱逐,开除 impel v.驱动 propel v.推进 repel v.击退
bare adj 光秃秃的 赤裸的
underestimate v 低估 under-estimate
depth n 深度 deep-th th, 表示"动作,性质, 过程,状态
despair v 绝望(de 去掉+spair[=sper希望])
scar scar 刀疤(sc-词根:雕刻 ar=er=or=ir=ur-名词后缀)
Drill
pro mot ion ↓ ↓ ↓ 前缀 词根 后缀 pro-向前在前,很多,赞同 mot-动 ion-名词 promotion n.促进,促销,升职 词根词缀类似于汉语的偏旁部首 前缀表方向,词根表含义,后缀表词性
为提高效率,用构词联想记忆法来背单词,大致要经 过以下几个步骤。
Roo词t 根an词d 缀affix
Our task
Listen to three classic English songs and learn new words from them
Summarize a strategy to learn new words called root and affix
词根 tain 表示"拿住"
attain v.获得 contain v.包含
entertain v.娱乐,招待
detain v.耽搁
maintain obtain retain sustain
v.保持 v.获得 v.恢复 v.持续,支持
词根 pel 表示"推,驱动" compel v.强迫 dispel v.驱散 expel v.驱逐,开除 impel v.驱动 propel v.推进 repel v.击退
bare adj 光秃秃的 赤裸的
underestimate v 低估 under-estimate
depth n 深度 deep-th th, 表示"动作,性质, 过程,状态
despair v 绝望(de 去掉+spair[=sper希望])
scar scar 刀疤(sc-词根:雕刻 ar=er=or=ir=ur-名词后缀)
Drill
pro mot ion ↓ ↓ ↓ 前缀 词根 后缀 pro-向前在前,很多,赞同 mot-动 ion-名词 promotion n.促进,促销,升职 词根词缀类似于汉语的偏旁部首 前缀表方向,词根表含义,后缀表词性
为提高效率,用构词联想记忆法来背单词,大致要经 过以下几个步骤。
词根词缀构词法PPT课件
第9页/共67页
If so, we shall be badly fooled. 如果这样我们就会上大当。
He insisted on staying up to nurse the child.
他坚持不睡觉来护理这个小孩。 We were hosted by members of the embassy.
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Exercise: Rewrite the sentences as the example shows.
Example: What’s the answer? They want me to answer the question.
1. The Chicago Bulls won their first championship in 1991. There was a first championship ___w_i_n___ for the Chicago Bulls in 1991.
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More Exercise
1. His answer was “No”. He _a_n_s_w__e_re_d__ “No”.
2. My dream was to play for the Shanghai Sharks. I _d_r_e_a_m__ed__ of playing for the Shanghai Sharks.
misv202135一常见的单词前缀1nonundisinimiril用于形容词副词或名词之前表示否定的意义nonmoral非道德范围内的nonexistent不存在的nonstop不停的2021362undis用于动词前表示相反的动作undress脱衣服unwrap打开uncover揭开盖disappear消失disagree不同意3mis用于动词前表示错误misunderstand误会misuse误用mistake弄错misspell拼错2021374
高中英语词根词缀PPT课件
television 电视
visage 外观
visit
参观
认识一个词根,就易于并能牢固地记住一群单词。
闻一知十,立竿见影。
.
6
4.单词的“构件”
▪ Pro-
-pel-
▪
-port-
-able
▪ Im-
-mort-
-al
▪ Re- ex- -port-
▪
-cord-
-ial -ly
▪ Tri-
-gon(o)- -metry-
2. 后缀:通常情况下,后缀不但改变词,还改变词性,常见的后缀 有动词后缀、副词后缀、形容词后缀和名词后缀。
.
18
前缀形式 常见的前缀有如下几类: 第一类:表示正负(或增减)的, 如:un-in-im-il-ir-non-mis-mal-dis-anti-de-under-re-over-等; 第二类表示尺寸的, 如:semi-equi-mini-micro-macro-mega-等; 第三类表示位置关系, 如:inter-super-trans-ex-extra-sub-infra-peri-等; 第四类表示时间和次序,如:ante-pre-prime-post-retro-等; 第五类表示数字,如:semi-mono-bi-tri-quad-penta-hex-sept(em)oct-dec-multi-等;其它类别,如:pro-auto-co-con-等。
▪ see
vis
in vis ible
im mort al
prefix root suffix
前缀 词根 后缀
词根意义代表了单词的中心意义,它在单词中占主导地位。
单词意义结合词缀(前后缀)的意义,即产生一个单词意义。
词根词缀词源速记ppt课件
解该单词的主要含义,词根与汉语的部首一样,也有变异, 且很普遍,但词根的变异主要是元音、辅音字母的变化和 特殊音变。例如:flood“洪水”与float“漂浮”都与 “流”有关,元音字母组合oo与oa发生了元音音变; save“挽救”与safe“安全”都与“救”有关,v与f发生 了辅音音变。
第二.英语单词的构成
步的素描→n.动画片,卡通;漫画。
•
•
②tent帐篷-thin瘦的
•
• tent伸展、拉紧→展开拉紧拉牢的东西→n.帐篷。
•
• thin拉,伸→同样的体重拉开→a.薄的;瘦的;稀的。
•
• ③forget忘记-guess猜
•
• forget for-不(同汉语“否”),离+get抓,脱离抓的状态→失去→ 失去记忆→v.忘记;忘掉。
母)也会发生音变。
• 汉语:
• ①括kuò,被读成guā(刮)的音。
• ②各gè,经常被许多人读成gāo。
• ③恬tián,被读成guā(刮)的音。
• 英语: • ①top顶部-tap龙头 • o与a发生了音变,但它们的核心意思没有变化,都与“顶
部”有关。 • tap顶→端头→放水等的端头→n.(自来水、煤气等的)
• ⑦decide决定-decision决定
• n-r-l音变 • • lunch午餐-noon中午 • • lunch lun=noon(l与n发生音变,u与oo发
生音变)+ch(汉语拼音“吃”)=drink饮、 喝,由中午喝引申 为午餐。
• 形近字母互换: • • v-u互换 • • ①solve解决-solution解决 • • ②astronaut宇航员-navy海军 • • astronaut astro-宇宙,太空+naut船,驾驶员,
第二.英语单词的构成
步的素描→n.动画片,卡通;漫画。
•
•
②tent帐篷-thin瘦的
•
• tent伸展、拉紧→展开拉紧拉牢的东西→n.帐篷。
•
• thin拉,伸→同样的体重拉开→a.薄的;瘦的;稀的。
•
• ③forget忘记-guess猜
•
• forget for-不(同汉语“否”),离+get抓,脱离抓的状态→失去→ 失去记忆→v.忘记;忘掉。
母)也会发生音变。
• 汉语:
• ①括kuò,被读成guā(刮)的音。
• ②各gè,经常被许多人读成gāo。
• ③恬tián,被读成guā(刮)的音。
• 英语: • ①top顶部-tap龙头 • o与a发生了音变,但它们的核心意思没有变化,都与“顶
部”有关。 • tap顶→端头→放水等的端头→n.(自来水、煤气等的)
• ⑦decide决定-decision决定
• n-r-l音变 • • lunch午餐-noon中午 • • lunch lun=noon(l与n发生音变,u与oo发
生音变)+ch(汉语拼音“吃”)=drink饮、 喝,由中午喝引申 为午餐。
• 形近字母互换: • • v-u互换 • • ①solve解决-solution解决 • • ②astronaut宇航员-navy海军 • • astronaut astro-宇宙,太空+naut船,驾驶员,
常见词根词缀整理.ppt
•
-ic heroic poetic economic
•
-some troublesome handsome quarrelsome
(2)表示“充满或缺乏”
• (3)表示“类似”
-free duty-free care-free -ish childish stylish greenish worry-free
4:表示“程度、大小或差别”
macromicrominioversuper-
under-
vice-
macroeconomics microscope Microsoft micro-oven minibus miniskirt minimum overwork overuse overhear supermarket superpower superb superstar underdeveloped underestimate underline undermine vice-president vice-principal
-ful hopeful useful wonderful helpful
-less hopeless useless needless
-like childlike businesslike
-ly brotherly friendly deadly deathly
-(i)ous dangerous various anxious serious
10: duc (duct) =lead educate introduce introduction conduct product reduce reduction deduce
11: fer =bring, carry conference confer differ different offer prefer preferable transfer defer
常见词根词缀整理.ppt
•
-ment movement government encouragement Nhomakorabea•
-ness kindness carelessness
•
-ship
friendship leadership relationship
•
-ure
exposure failure measure leisure pleasure
4:表示“程度、大小或差别”
macromicrominioversuper-
under-
vice-
macroeconomics microscope Microsoft micro-oven minibus miniskirt minimum overwork overuse overhear supermarket superpower superb superstar underdeveloped underestimate underline undermine vice-president vice-principal
2:常见的动词后缀
(1)表示“使(成为)” “使……化”
• -ate circulate decorate regulate alternate • -en strengthen weaken broaden widen lighten • -ify classify simplify specify qualify certify • -ize realize organize criticize recognize • -ish astonish cherish establish finish punish
-y rainy cloudy dirty hairy trendy fishy
英语中的词缀与词根PPT课件
Example:
polygon
Prefix: uni Meaning: one
Examples:
unicycle
universal
Prefix: quad Meaning: four
Example:
quadrilateral
Prefix: tri Meaning: three
Examples:
Prefixes, Suffixes, Affixes and Root Words
A Presentation Created by TEACHERS UNLEASHED
Root words and Base words
• Root Words and Base Words are the same.
un+cook+ed=uncooked
Prefix
Suffix
Prefix: imMeaning: not
Examples:
impossible
impolite
Prefix: in Meaning: not
Examples:
invisible
infamous
Prefix: non Meaning: not
Examples:
promotion
protest
Prefix: con Meaning: with, together
Examples:
connect
confide
Prefix: com Meaning: together
Examples:
community
communicate
Prefix: ex Meaning: Out of, from
polygon
Prefix: uni Meaning: one
Examples:
unicycle
universal
Prefix: quad Meaning: four
Example:
quadrilateral
Prefix: tri Meaning: three
Examples:
Prefixes, Suffixes, Affixes and Root Words
A Presentation Created by TEACHERS UNLEASHED
Root words and Base words
• Root Words and Base Words are the same.
un+cook+ed=uncooked
Prefix
Suffix
Prefix: imMeaning: not
Examples:
impossible
impolite
Prefix: in Meaning: not
Examples:
invisible
infamous
Prefix: non Meaning: not
Examples:
promotion
protest
Prefix: con Meaning: with, together
Examples:
connect
confide
Prefix: com Meaning: together
Examples:
community
communicate
Prefix: ex Meaning: Out of, from
最新英语词根词缀学习PPT课件
enlighten = ?? ~ sb. on sth. encounter = ?? counterpart We’ve encountered some
turbulence, please keep your seatbelt fastened.
encounter into / come across / coincide with (incident coincidence)
unscrupulous 马虎的; 死不要脸的;寡廉鲜耻的
scrutinize (v.) 仔细审查 scrutiny (n.)
unconscious=无意识的 subconscious
submit subtitle subtle unfeasible=不能实施的 ease-轻松,悠闲 undergo=经历 experience Undertake承担 创业 innovative undertaking
An overwhelming number of …
immerse=浸在…; 沉浸在…
-merse (v.) 沉在… be immersed in sth.
abandon oneself to grief/pleasure M&A: Merger and Acquisition acquire acquisitive (a.) 贪婪的 merse=merge=吞并: M&A
分析:leg=law delegate = ?? 下面选出的厚道之人=代表 legislate (v.)= ?? 立法
前缀-Prefix (向上↑): up-: ↑
uphold (v.) upsurge surge uproar
roar 咆哮,大声疾呼 == riot / disturbance
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9
常见 后缀
名词后缀:表达特殊含义
-hood: childhood, neighborhood, motherhood, 性质,时期
daughterhood
-ship :friendship, leadership,
身份
-ism: socialism, materialism
主义
-ache: toothache, headache
佳一中2016高一英语组
词汇专题(一) 常用词缀
1
学
习
目
标
1、了解词根词缀的基本功能 2、学习常见词缀及其含义 3、提升利用词根词缀扩展词汇量的能力
2
词根词缀的基本功能 词根:决定词的主体含义
前缀:一般改变词义
词缀
后缀:一般改变词性
3
常
见
前
缀
否定前缀:
un- : unexpected, unable, uncommon, unreal, unnatural dis-: disorder, distrust, dishonest mis-: mistake, misunderstand, misuse im-: impossible, in-:inexperienced, independent, inexpensive il-:illegal ir-:irregular anti-: anti-war anti-nature
名词后缀:表人 -ant: assistant, applicant -ist: novelist, specialist -mate: classmate, roommate -ian: musician, historian
10
EX1. Add a negative prefix to each group to create words with opposite meaning. __dis__-appear ability agree honest __un__-usual expected willing happy lucky fortunately __in__-correct capable visible experienced __im__-possible polite mature __non__-stop smokers __mis__-understand take fortune lead
12
(2) adj.→n.
sad →sadness dark→darkness
different→diffence important→importance
able→ability
active→_activityt agree→ agreement
govern→government decide---decision
5
micro-: microwave, Microsoft bi-:bicycle tri-: tricycle, triangle multi-: multicultural en-: enlarge, enrich, encourage
6
常
见
后
缀
形容词后缀:
-able: acceptable, usable, reasonable -ous: anxious, curious -ish: selfish, reddish, childish -al/ -ual / -cal : actual, spiritual, medical, practical -ive: active, objective, -ful: painful, handful, mouthful
7
常
见
后
缀
动词后缀: -en: soften, harden, widen -ize: realize, organize, -fy: simplify,beautify
8
常见 后缀
名词后缀: -ion/ tion/ ation: imagination, operation,
trasportation -ce/ ance: importance, acceptance -ty: difficulty, curiosity, -th: growth, truth, width, -ment: experiment, argument -ness: kindness, rudeness, happiness -some: handsome, tiresome, troublesome
11
EX3. Add Suffix to each of the following words to change the part of speech. (1) n.→ adj.
hand→handful mouth→mouthful attract→attractive act→active value→valuable unforget→unforgettable cloud→cloudy fog→foggy nature→natural nation→national danger→dangerous fame→famous child→childish self→selfish
invent→invention suggest→suggestion
celebrate→celebration pollute→pollution
explain→explanation exam→examination
13
(4) 表示“人” dance→dancer piano→pianist visit→visitor
4
常
见
前
缀
re- : restart, repeat, repay pre-: pre-reading, preshow, prepare post-:post-reading, postwar inter: international, internet
over- : overbook, overwork, overhear co-: co-worker, cooperate auto-: automobile trans- : transport , transform , sub-: subway , subtitle
常见 后缀
名词后缀:表达特殊含义
-hood: childhood, neighborhood, motherhood, 性质,时期
daughterhood
-ship :friendship, leadership,
身份
-ism: socialism, materialism
主义
-ache: toothache, headache
佳一中2016高一英语组
词汇专题(一) 常用词缀
1
学
习
目
标
1、了解词根词缀的基本功能 2、学习常见词缀及其含义 3、提升利用词根词缀扩展词汇量的能力
2
词根词缀的基本功能 词根:决定词的主体含义
前缀:一般改变词义
词缀
后缀:一般改变词性
3
常
见
前
缀
否定前缀:
un- : unexpected, unable, uncommon, unreal, unnatural dis-: disorder, distrust, dishonest mis-: mistake, misunderstand, misuse im-: impossible, in-:inexperienced, independent, inexpensive il-:illegal ir-:irregular anti-: anti-war anti-nature
名词后缀:表人 -ant: assistant, applicant -ist: novelist, specialist -mate: classmate, roommate -ian: musician, historian
10
EX1. Add a negative prefix to each group to create words with opposite meaning. __dis__-appear ability agree honest __un__-usual expected willing happy lucky fortunately __in__-correct capable visible experienced __im__-possible polite mature __non__-stop smokers __mis__-understand take fortune lead
12
(2) adj.→n.
sad →sadness dark→darkness
different→diffence important→importance
able→ability
active→_activityt agree→ agreement
govern→government decide---decision
5
micro-: microwave, Microsoft bi-:bicycle tri-: tricycle, triangle multi-: multicultural en-: enlarge, enrich, encourage
6
常
见
后
缀
形容词后缀:
-able: acceptable, usable, reasonable -ous: anxious, curious -ish: selfish, reddish, childish -al/ -ual / -cal : actual, spiritual, medical, practical -ive: active, objective, -ful: painful, handful, mouthful
7
常
见
后
缀
动词后缀: -en: soften, harden, widen -ize: realize, organize, -fy: simplify,beautify
8
常见 后缀
名词后缀: -ion/ tion/ ation: imagination, operation,
trasportation -ce/ ance: importance, acceptance -ty: difficulty, curiosity, -th: growth, truth, width, -ment: experiment, argument -ness: kindness, rudeness, happiness -some: handsome, tiresome, troublesome
11
EX3. Add Suffix to each of the following words to change the part of speech. (1) n.→ adj.
hand→handful mouth→mouthful attract→attractive act→active value→valuable unforget→unforgettable cloud→cloudy fog→foggy nature→natural nation→national danger→dangerous fame→famous child→childish self→selfish
invent→invention suggest→suggestion
celebrate→celebration pollute→pollution
explain→explanation exam→examination
13
(4) 表示“人” dance→dancer piano→pianist visit→visitor
4
常
见
前
缀
re- : restart, repeat, repay pre-: pre-reading, preshow, prepare post-:post-reading, postwar inter: international, internet
over- : overbook, overwork, overhear co-: co-worker, cooperate auto-: automobile trans- : transport , transform , sub-: subway , subtitle