1. Common Prefixes

2. Vocabulary Root word (base word) – a word with no prefixes or suffixes Prefix – a group of letters in front of a word that change the meaning of the word Suffix – a group of letters at the end of a word that change the meaning of the word Affixes - group of letters in front of a word or at the end of a word used to change the meaning of that word

3. What is a prefix? a group of letters that is added to the beginning of a word to change its meaning Prefixes are put at the beginning of a word to change its meaning.

4. Common Prefixes pre un dis re bi trans mis anti ex pro

5. pre pre - "before" Lets go see the Spiderman preview! pre + kindergarten = pre-kindergarten pre + school = preschool pre + historic = prehistoric

6. un un - "not" The movie was unbelievable! un + sure = unsure un + attractive = unattractive un + available = unavailable un + aware = unaware un + popular = unpopular

7. dis dis - "not" dis + satisfied = dissatisfied dis + respect= disrespect You should never disrespect your teachers. They are there to help you!

8. re re - "again" re + charge = recharge Will you please rearrange the desks? re + fuel = refuel re + cycle = recycle re + enter = reenter

9. bi bi - "two" All I want for my birthday is a bicycle! bi + cycle = bicycle bi + monthly = bimonthly bi + lingual = bilingual bi + focal = bifocal

10. trans trans - "across" Jackie is going on a transoceanic trip. trans + oceanic = transoceanic trans + port = transport

11. mis mis - "not" mis + inform = misinform The public was misinformed about the toy sale. mis + pronounce = mispronounce mis + fire = misfire

12. anti anti – "against " Pass me the antibacterial soap. I want to kill all the bacteria on my hands anti + biotic = antibiotic anti + freeze = antifreeze anti + government = antigovernment anti + bacteria = antibacteria

13. ex ex - " previous" ex + wife = ex-wife ex + landlord = ex-landlord ex + president = ex-president George W. Bush will soon be our latest ex-president.

14. pro pro - " in support of " pro + African = pro-African pro + Mexican = pro-Mexican pro + football = pro-football I am pro-family. I love my beautiful family.

15. uni = one; unicycle; unicorn bi = two; bicycle; bicentennial tri = three; tricycle; triangle; triathlete quad = four; quadrillion; quadruplets More common prefixes

16. Prefix Activity http://www.tv411.org/lessons/cfm/vocabulary.cfm?str=vocabulary&n um=1&act=1

17. The End