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《Word power： Prefixes and suffixes； Organs of the body》新课标教案优质课下载
Make full use of the teaching tool designed by myself, ask students to get as many words as possible
Step II Introduction
independence
in depend ence
prefix(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.
Suffix: a letter or a group of letters added to the end of a word to make a different word.
Attention !
Usually a prefix will change the meaning of word, while a suffix will change the part of speech of a word.
StepIII Prefixes
Sometimes you can guess what a word means by looking at its prefix or suffix. Look at the examples and work out the meanings.
PrefixExample Meaning anti-anti-cloning, anticanceragainst, opposed todis-
un-disappear, disagree
unfair, unwillingnot, apposed of
in-
il-
im-
ir-incorrect, incomparable
illegal, illogical
immoral, immodest
irresponsible, irregular
not, without
pre-preview, preserveearly, beforepro-pro-cloningin favour of, supportingre-recreate, repeat, renewagainStepIV Adding information
Some other commonly used prefixes
PrefixExampleMeaningde-decompose, declassifyapart, frommal-maltreatment, malnutritionbadly, illnon-non-smoker, non-alcoholic, non-profitnotinter-international, interaction, interruptbetweentele-telescope, telegram, telecommunicationfar offtrans-transport, translate, transnationalacrossmis-misunderstand, mislead, misdeedwrongsub-subtitle, subway, submarineunderover-overeat, overwork, overacttoo muchtri-triangle, tricycle, tricolorthreeauto-autobiography, autoalarm, automobileselfStep V Suffixes