Prefixes

Prefix (before a word) Exercises:

Opposites
http://tx.english-ch.com/teacher/jocelyn/others/doing-the-opposite-usingprefix/

http://usefulenglish.ru/writing/spelling-exercise-four

http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv45.shtml

http://kaj.upol.cz/materialy/lexicology/negprefixes.htm

"Over" and "under" Prefixes notes and exercises

http://www.english-in-chester.co.uk/e-learning/lesson/prefixes-with-over-and-under/

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-79779.php

http://esllessons.blogspot.ca/2008/05/vocabulary-over-and-under-prefixes.html


Bi, tri, ...prefixes

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-32881.php

mixed prefixes

http://www.kwiznet.com/p/takeQuiz.php?ChapterID=10084&CurriculumID=67&Num=1.45

Prefixes and suffixes chart and exercises (extra practice and notes for vocabulary building for academic writing)
http://personales.mundivia.es/emca/english4u/wordfor.html