Adverbial is a clause element that reflects various syntactic functions and semantic roles. It has different morphological forms and positions, therefore dealing with this topic demands a lot of cautiousness and accuracy. There are many different structures working as adverbials in English, involving, single words, phrases and even finite/non-finite clauses. The excessive nature of adverbials can be considered problematic for EFL learners. This research is associated, as its title proposes, with the problems of the effect of adjuncts and subjuncts positions on their meanings encountered by Iraqi EFL learners in literary texts. This paper hypotheses that Iraqi EFL students are unable to realize the relation between the semantic functions of adverbials and their position. It is assumed that they find hardness in determining the adverbials within various literary devices. The study hopes to show the effect of adverbials positions on their semantic roles in certain literary genres. It aims to clarify adverbials within different literary devices. The study adopts for the most professional students who to do the test. The researcher selects fifteen MA candidates at the academic year (2019-2020). The hypotheses are proved by a diagnostic test whose results approve the hypotheses. The whole percentage of correct responses is 46% while the rate of incorrect answers is 54%. It is concluded that Iraqi EFL learners are unaware of the fact that the position of adverbials affects the semantic functions of adjunct and subjunct. It is also concluded that these learners misunderstand adverbial usage within various literary techniques.