OK Belly you got me... I was trying to be too simple with my explanation
Here are the uses of
for that Webster knows:
"1 a—used as a function word to indicate purpose <a grant
for studying medicine> b—used as a function word to indicate an intended goal <left
for home><acted
for the best> c—used as a function word to indicate the object or recipient of a perception, desire, or activity <now
for a good rest><run
for your life><an eye
for a bargain>2 a
: as being or constituting <taken
for a fool> <eggs
for breakfast> b—used as a function word to indicate an actual or implied enumeration or selection <
for one thing, the price is too high>3
: because of <can't sleep
for the heat>4—used as a function word to indicate suitability or fitness <it is not
for you to choose><ready
for action>5 a
: in place of <go to the store
for me> b (1)
: on behalf of
: representing <speaks
for the court> (2)
: in favor of <all
for the plan>6
: in spite of —usually used with
all<
for all his large size, he moves gracefully>7
: with respect to
: concerning <a stickler
for detail> <heavy
for its size>8 a—used as a function word to indicate equivalence in exchange <$10
for a hat>, equality in number or quantity <point
for point>, or correspondence or correlation <
for every one that works, you'll find five that don't> b—used as a function word to indicate number of attempts <0
for 4>9—used as a function word to indicate duration of time or extent of space <gone
for two days>10
: in honor of
: after <named
for her grandmother>" ;-)