... graduation paper: A study on prepositions of direction and some errors made by Vietnamese learners . Your answers play a very important and useful part, making a great contribution to my study. ... ambition of covering all kinds of preposition and research errors made by learners of all countries in the word, but only prepositions of direction and some errors made by Vietnamese learners. ... theory of preposition, classification of preposition. Chapter II is prepositions of direction, which consist of what are prepositions of direction, analysis some examples of preposition of direction,...