Numerous understudies in our specialty  make a great deal of  errors in the utilization of preposition in their composed preparations. These mistakes  contain important data  on the procedures  utilized  by them  to procure  English  as a  remote  dialect. It is through mistake investigation that  the instructor  can assess learning  and showing and focus  the needs for future endeavors. The aim  of this article is to recognize, portray  and clarify students'  lapses  in the utilization of relational words at Almakarim 3rd intermediate school. This serves as an observational proof to demonstrate that the issue exists and to certify or invalidate the accompanying  speculations: There are different sorts of lapses due to utilizing relational word, There are dominant mistake in the investigation, there is interlingual and intralingual induction of slip and there are conceivable answer for the issue. This paper displays the dominant slip, real lapse in the utilization of relational word, wellsprings of error and conceivable answers for the issue.