My name is jenn, and im studying English as Foreign Language. I am a little confuse using some of the words like "OF", "FOR", "WITH", and "TO".. could anybody help me? whats the difference? and when to use them?
You have just asked the million dollar question!
Prepositions are the cruelest invention known to man and you may have noticed that 9/10's of my questions relate to prepositional usage ... and I'm a native English speaker! (I have been living away from North America since 1985 and I can feel my grip on English prepositions slowly loosening).
My advice to you is to use the dictionary for the physical concrete definitions of prepositions: "The man is in the car", "Your dinner is on the stove", etc. Idioms and fixed expressions using prepositions ("The airplane arrived on time and I got to the airport in time to see it land", "You're in for a treat") simply have to be learned by heart.
Or if in doubt about a particular expression, ask the good folks at UsingEnglish.com!
Good luck with your studies.