English is a compulsory foreign language in all public and private primary and secondary schools and universities in the Republic of Kosovo. English language is a separate subject in the "Curricular Framework of Pre-University Education in the Republic of Kosovo", where it is ranked after the mother tongue. Thus, English occupies a particular place compared to other foreign languages, especially in the secondary and university education system. In the study, survey method was adopted and the participants were composed of randomly selected 300 gymnasium students. The data were collected using a questionnaire developed by the researcher, an interview form and an observation form. The obtained data were analyzed using descriptive statistics, such as frequency and percentage. The results have revealed that the quality of English language education in the gymnasiums in the Republic of Kosovo needs improvement since students fail to use conjunctions' grammatical functions and meanings properly, they can only understand simple and familiar words, and complex and unknown words hinder students from understanding the concept.