... carried out at Language and Informatics Center- Vinh City 1.3 OBJECTIVES The objectives of the thesis are: - Identifying the errors in using the prepositions of place and time: AT, ON, IN by Vietnamese ... at the top of the page / of + N 24 at the end of the road at the corner of the street in the corner of the room at the front / at the back of a building, hall, group of people In the front / the ... that errors are 12 originated in the learners’ disposition to transfer forms and meanings, and the distribution of forms and meanings of their native language and culture to the foreign language...