单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,高中英语课件,madeofcanruohanxing,高中英语课件madeofcanruohanxing,1,Unit3,Science versus nature,Word power,Unit3 Science ver,2,Prefixes and suffixes,Organs,of,the body,Prefixes and suffixesOrgans,3,构词法,构词法,4,根据构词法，复合词分为派生词、合成词、转化词。,派生词是由词根加派生词缀构成。,复合词,根据构词法，复合词分为派生词、合成词、转化词。复合词,5,大多数的前缀并不影响词的词性，而仅对词根的意义加以修饰，表示否定、相反、贬低、程度、时间、方位等意义,。,不改变词根的基本意义，而是改变了词性。,前 缀,后 缀,前 缀后 缀,6,1.动词变名词：,-,ation,satisfaction,education,realization,-ment,development,movement,disappointment,-al,arrival,refusal,-,ee,trainee,employee,-,er,teacher,worker,-,or,visitor,sailor,1.动词变名词：-ationsatisfaction,ed,7,in,depend,ence,In-,depend,-ence,Prefix,(,前缀,),root,(,词根,),Suffix,(,后缀,),independenceIn-depend-encePref,8,appear,novel,regular,respect,We are going to have some questions.Please use these words to help you,but you need to add some letters to the words first.,1),You cannot find your new pen.What happened to your pen?,2),Many people respect Mr.Li and think he is a good man.He helps people out and is a good citizen and friend.So can you find a word to describe Mr.Li?,It,dis,appeared,Respect,able,appear,novel,regular,9,3),Miss Wang has published several books.She loves her job writing novels.So what is Miss Wangs occupation,(,职业,),?,4)You cannot find the order of the numbers in a group of members.So can you find a word to describe the order of the numbers?,ir,regular,She is a novel,ist,appear,novel,regular,respect,3)Miss Wang has published sev,10,Attention!,Usually a prefix will change the meaning of word,while a suffix will change the part of speech of a word.,Attention!Usually a prefix w,11,Sometimes you can guess what a word means by looking at its prefix or suffix.,Look at the examples and work out the meanings.,Prefix,Example,Meaning,anti-,anti-cloning,anticancer,against,opposed to,dis-,un-,disappear,disagree,unfair,unwilling,not,apposed of,in-,il-,im-,ir-,incorrect,incomparable,illegal,illogical,immoral,immodest,irresponsible,irregular,not,without,Sometimes you can guess what a,12,Prefix,Example,Meaning,pre-,preview,preserve,early,before,pro-,pro-cloning,in favour of,supporting,re-,recreate,repeat,renew,again,Sometimes you can guess what a word means by looking at its prefix or suffix.,Look at the examples and work out the meanings.,Prefix Example Meaning pre-pr,13,Some other commonly used prefixes,Prefix,Example,Meaning,non-,not,non-smoker,non-alcoholic,non-profit,inter-,international,interaction,interrupt,between,tele-,telescope,telegram,telecommunication,far off,trans-,transport,translate,transnational,across,mis-,misunderstand,mislead,misdeed,wrong,sub-,subtitle,subway,submarine,under,over-,overeat,overwork,overact,too much,tri-,triangle,tricycle,tricolor,three,auto-,autobiography,autoalarm,automobile,self,Some other commonly used prefi,14,Prefix,Example,Meaning,-able,comfortable,noticeable,worthy of,able to be,-ful,cheerful,thoughtful,full of,characterized by,-ist,scientist,novelist,someone who does something,-less,hopeless,aimless,without,-ment,agreement,treatment,indicate a state or condition,-ness,dryness,madness,indicate a quality,state or character,Prefix ExampleMeaning-ab,15,Some other commonly used suffixes,-al,cultural,national,original,of or concerning,-ion,invitation,competition,protection,action or condition of,state of being,skill,-ship,hardship,scholarship,relationship,-dom,freedom,kingdom,condition or state of,of the nature of,-ish,childish,selfish,-proof,waterproof,fireproof,soundproof,protect against,-en,widen,sharpen,shorten,make or become,-ward,eastward,homeward,backward,in the direction of,-like,womanlike,childlike,similar to,Some other commonly used suffi,16,Do you think we should protect nature?Complete what an environmentalist is saying below.Use the words from the box.,disrespect,hopeless,illegal,uncertain,understandable,I think cutting down trees should be made,(1),_ and tighter laws should be introduced.So many people are showing their,(2),_ for nature;they dont seem to care that they are destroying the environment.Sometimes I think we are fighting a,(3),_ battle against people who just wont listen.I know scientists have worked hard to achieve scientific breakthrough but its,(4),_ whether theyll succeed totally.Although,its,(5),_,that they want to advance technology,I think some things are best left the way they are.,illegal,disrespect,hopeless,uncertain,understandable,Do you think we should protect,17,大多数的前缀并不影响词的词性，而仅对词根的意义加以修饰，表示否定、相反、贬低、程度、时间、方位等意义。,前 缀,前 缀,18,1.表示否定的前缀：,un-,non-,in-,dis-,im-,il-,ir-,unfair,unhappy,nonsmoker,nonbook,(常用在,n.adj.adv.,前),inactive,inhuman,indirect,(常用在,adj.,后),disagree,disappear,impolite,impossible,(用在,b,p,m,开头的词前),illegal,irreal,irregular,.前缀：,1.表示否定的前缀：un-unfair,unhappyno,19,2.表示错误或失当的前缀:,mis-,misjudge,misdirect(,误导),3.表示向背的前缀:,pro-,anti-,pro-Chinese,pro-American,antiwar,anti-Japanese war,2.表示错误或失当的前缀:mis-misjudge,20,4.表示程度、大小的前缀,super-,over-,mini-,under-,semi-,superstar,supermarket,superman,superpower,overhead,overeat,overuse,minibus,miniskirt,