when and where i.e words we should use the sufix mis,-mal,-im,ir
Those are prefixes, not suffixes, aren't they? They come at the BEGINNING of words; here are some examples:
misplaced
misspelled
misstep
malevolent
malware
malady
immaterial
immerse
(2 different meanings in those two)
irrevocable
irretrievable
irresistible
Look up these words at http://www.answers.com and/or http://www.onelook.com
At OneLook, you can also search like this, including the asterisk:
mis*
mal*
im*
ir*
All of these four prefixes will give a word a negative meaning or an opposite meaning to what the root word means.