mark the object of the verb
  私 は りんご たべます
indicates that the action is through, along, across, at, etc. a certain place.
and, this is used between two or more nouns.
   
too, also
   
used to change a sentence into a quetion
"Isn't it?" "Aren't you?"
noun modifier. Used between 2 nouns. The 1st noun modifies the 2nd one. 
   
emphasis what you are saying
   
mark the direction
   
 
   
   
 
 
もう already