... 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. ... grateful to M .A Pham Thi Thu Hang, the lecturer of the Department of Foreign Language, Hai Phong Private University. She was critical and demanding and yet very caring and supportive along the way. ... English that can be used either as a preposition, an adverb or a conjunction. The preposition governs an object, so it is always related to a noun, a noun phrase, pronoun or gerund. An adverb particle...