前缀后缀构词法-完整版PPT

1、Unit 3Science Versus Natureable agree appear lead novel regular respectAnswer questions with these words. Attention! You need to add some letters to the words first.1.You can not find your new pen. What happened to your pen? It _. disappeared2. You want to get the book on the top of the shelf, but y

2、ou are not tall enough. Do you think you will be able to reach the book? I am _ to do so. unable3. The two groups at the meeting dont agree with each other. They argued fiercely. So what is the problem between them called? Disagreement. 4. Many people respect Mr. Li and think he is a good man. He he

3、lps people out and is a good citizen and friend. So can you find a word to describe Mr. Li? Respectable.值得尊敬的 5. Miss Wang has published several books. She loves her job writing novels. So what is her profession? She is a novelist. 6. Some ads say that if you take their pills, you will be healthy, l

4、ook younger, become smarter and sleep better. What can you say about this kind of ads? （lead）They are_. misleadingGoals:Prefixes & suffixesOrgans of the bodyindependenceindependenceprefix(前缀)root (词根)suffix(后缀)Prefix: a group of letters that is added to the beginning of a word to change its meaning.

5、Suffix: a letter or a group of letters added to the end of a word to make a different word.Work in pairs and try to guess what a word means by looking at its prefix. Prefix Example Meaning anti-anti-cloning dis-disappear in- im- il- ir-incorrect impossible illegal irresponsible against, opposed to n

6、ot , opposite of not, without Prefix Example Meaning pre-preview pro-pro-cloning un-unfair rerecreateearly, before in favor of, supporting not, opposite of again Try to guess what a word means by looking at its suffix.Suffix Examples Meaning -able comfortable -fulcheerful-istscientistworthy of, able

7、 to be full of, characterized by someone who does something Suffix Examples Meaning -lesshopeless-mentagreement-nessdrynesswithoutindicate a state or condition indicate a state, quality or characterLets fill in the blanks with the words below.disrespect hopeless illegal uncertain understandableI thi

8、nk cutting down trees should be made _and tighter laws should be introduced. So many people are showing their _ for nature; illegaldisrespect they dont seem to care that they are destroying the environment. Sometimes I think were fighting a _ battle against people who just wont listen. I know scient

9、ists have worked hard to achieve scientific breakthroughs but its _ whether theyll ever succeed totally. hopeless uncertain Although its _ that they want to advance technology, I think some things are best left the way they are. understandable if they areWork in groups of four and try to give more p

10、refixes and suffixes and list several words as examples. DiscussionPrefix ExampleMeaning de-mal-non-notDeplane 使下飞机maltreatment虐待malnutrition营养不良non-smoker, non-alcoholic, non-profitapart, frombadly, illinter-international, interaction, betweentele-telescope望远镜telegram电报telecommunication电信far offPre

11、fix ExampleMeaning trans-transnational影响数国的;数国参与的;跨国的acrossmis-misunderstand, misleadwrongsub-subtitle副标题subway地下人行道/地铁, submarine潜艇underover-overeat, overworktoo muchSome other commonly used suffixes-alcultural, national, originalof or concerning-ioninvitation, competition, protectionaction or condition ofstate of being, skill-shiphardship艰难, scholarship学问/奖学金relationship-domfreedomcondition or state ofof the nature of-ishchildish幼稚的，孩子气的, selfish, mannish男子气的-proofwate