SOME COMMONLY CONFUSED WORDS
We use these words a lot (not  alot).  Find the ones that give you trouble and practice using them correctly. For an alphabetical list with hyperlinked explanations, visit Roane State's COMMON ERRORS IN ENGLISH.
 

CONFUSED WORDS	MEANING
accept  except	to take, to receive. not including everyone
affect  effect	to change or influence  the result, consequence
all ready  already	completely prepared previously
cite  site	to quote a particular place
coarse  course of course	crude or rough in texture a path, a playing field, a unit of study certainly
complement  compliment	to go with or complete to flatter, or a flattering remark
conscience  conscious	moral principles aware or alert
could care less	nonstandard; use couldn't care less
could of/should of	nonstandard; use could have/ should have
it's  its	it is belong to it
knew  new	past tense of "to know" not old
loose  lose	not tight or not securely fastened to misplace or to not win
passed  past	past tense of the verb to pass belonging to a former time
quiet  quit	not loud, silent, noiseless to stop, cease, discontinue
suppose to/use to	nonstandard;use supposed to/used to
than  then	function word; indicates unequal difference at that time or next, following
their  they're  there	belonging to them they are a place
to  too  two	function word; indicates direction also, besides; indicates  excessiveness a number
weather  whether	atmospheric conditions refers to a choice between alternatives
who's  whose	who is belonging to whom
your  you're	belong to you you are