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3. A suffix (also postfix, ending ) is an affix which is placed at the end of a word. Some of the most common suffixes are :affix ment changes verbs nouns.. Ex: Punish punishment - Girl s where the suffix -s marks the plural.plural - He make s where suffix -s marks the third person singular present tense.singular present tense - He clos ed where the suffix -d marks the past tense.past tense

4. A prefix is a type of affix attached to a stem which modifies the meaning of that stem.affixstem The word "prefix" is itself made up of the stem fix (meaning "attach" in this case), and the prefix pre-, meaning "before. There is a lot of prefixes like : Native Anti antivirus Co coordinator Pro pro-life Anti antivirus Co coordinator Pro pro-life Neo-classical Ex out of export Up upgrade Tele television Ex out of export Up upgrade Tele television Archaic Y yclept

5. Reference http://en.wikipedia.org/wiki/English_pre fixes http://en.wikipedia.org/wiki/Suffixes