Unit 3 Science versus nature-- Word power课件

课件18张PPT。Unit3 Science and natureWord powerPrefixes and suffixes
Organs of the bodyAfter so many years of learning English, have you found some easy ways to
double your vocabulary?Use prefixes and suffixes
Sometimes you can guess what a word means by looking at its prefix or suffix. Look at the examples and work out the meanings.anti-anti-cloning, anticanceragainst, opposed todis-un-disappear, disagreeunfair, unwillingnot, apposed ofin-
il-
im-
ir-incorrect, incomparableillegal, illogicalimmoral, immodestirresponsible, irregularnot, withoutpre-preview, preserveearly, beforepro-pro-cloningin favour of, supportingre-recreate, repeat, renewagainSome other commonly used prefixesnon-notnon-smoker, non-alcoholic, non-profitinter-international, interaction, interruptbetweentele-telescope, telegram, telecommunicationfar offtrans-transport, translate, transnationalacrossmis-misunderstand, mislead, misdeedwrongsub-subtitle, subway, submarineunderover-overeat, overwork, overacttoo muchtri-auto-triangle, tricycle, tricolorautobiography, autoalarm, automobile threeself-ablecomfortable, noticeable worthy of, able to be-fulcheerful, thoughtfulfull of, characterized by-istscientist, novelistsomeone who does something-lesshopeless, aimlesswithout-mentagreement, treatmentindicate a state or condition-nessdryness, madnessindicate a quality, state or characterTipSome words take a hyphen (-) when a prefix is added.
We sometimes need to change the ending of a word before we can add a suffix. Attention !Usually a prefix will change the meaning of word, while a suffix will change the part of speech of a word.Some other commonly used suffixes-alcultural, national, originalof or concerning-ioninvitation, competition, protectionaction or condition of…state of being, skill-shiphardship, scholarship, relationship-domfreedom, kingdom, condition or state of…of the nature of…-ishchildish, selfish-proofwaterproof, fireproof, soundproofprotect against-enwiden, sharpen, shortenmake or become-wardeastward, homeward, backwardin the direction of-likewomanlike, childlikesimilar toDo you think we should protect nature? Complete what an environmentalist is saying below. Use the words from the box.disrespect, hopeless, illegal, uncertain, understandableI think cutting down trees should be made(1)_______ and tighter laws should be introduced. So many people are showing their(2)________ for nature; they don’t seem to care that they are destroying the environment. Sometimes I think we are fighting a(3)________ battle against people who just won’t listen. I know scientists have worked hard to achieve scientific breakthrough but it’s(4)___________ whether they’ll succeed totally.Although it’s(5)__________ that they want to advance technology, I think some things are best left the way they are.illegaldisrespecthopelessuncertainunderstandableOrgans of the bodylungsliverheartstomachkidneysKey to Exercise B Brain (2) heart
(3) liver (4) lungs
(5) stomach (6) kidneysActivity 1If you compare our body to our school life, you will be amazed how similar they are!Believe it or notGood matching!schoolbodyCleaners, repairman and security guards
Headmaster
Teacher
Notebook
Student
brain
liver
kidney
heart
stomachActivity 2Believe it or notThere can be many more comparisons. Just use your imaginations. Following is a poem. Can you find a proper position for each organ?Without you, , I would be blind as a car with no driver
Without you, , I would be cold as no warmth could be sensed
Without you, , I would be greedy as I never felt full
Without you, , I would fall silent as I could not sing my favorite songs
Without you, , I would be evil as I didn’t have the power to clean wrongness away
Without you, , I would be lost in my own world as nothing, good or bad, could ever find a way out!brainheartkidneysliverlungsstomachUse the power of word, create your own comparison!Take care of your organs, and you will be taken care of in turn!HomeworkRead the articles in Part A on page 110 and page111 and do Part B on the same page.