... formal and standard English is in demands An analysis of errors in using prepositions of place AT, ON, IN is carried out to give the answer to the wondering question That whether the errors in using ... full analysis of errors in using prepositions of place at, on, in made by secondary school students The Error Analysis has proved that Vietnamese secondary students meet a lot of difficulties in ... therefore, errors in the learning process of English are inevitable The errors in using prepositions, especially the prepositions of place AT, ON, IN are not exceptional The teaching and learning of prepositions...