López Estupiñán, Boris2023-12-052023-12-052017-08-22https://repositorio.pucese.edu.ec/123456789/1239https://repositorio.puce.edu.ec/handle/123456789/37820Tesis previa obtención del título de Licenciado/a en Lingüística Aplicada mención InglésTo analyze common written English grammatical mistakes in the students from the Applied Linguistics School at PUCESE, a prospective quanti-qualitative descriptive investigation was carried out, with the analytical-synthetical, the hermeneutic, and the statistical methods, using a survey, which contained open and closed questions to know specific information and students. opinions, and a test applied to the total of 45 students from the Applied Linguistics School, where they had to write a short essay about their future professional expectations. The results showed that all the students agreed that grammar must be taught during all the semesters so that they can learn it correctly and improve their knowledge. Besides, they think that grammar is the most important linguistic component to develop their communicative competence properly. The results also revealed that the most common written English grammatical mistakes are the use of the infinitive, specifically the for+ing form, the conjugation of the verb using the third person singular, and the verb tenses in general. There were coincidences with the results provided by several investigators in the field. It is concluded that Grammar must be taught during all the semesters until students finish their studies. Some tasks to teach grammar communicatively, with the necessary methodological orientations, were provided.en-USGRAMMAR; WRITTEN ENGLISH MISTAKES; METHODOLOGICAL ORIENTATIONS; APPLIED LINGUISTICS? STUDENTS.Thesis