Prepositions/conjunctions are one of the most effective words that prevent misunderstandings in any language. In Arabic, prepositions are named hurûf al-maany. Hurûf al-maany has a specific important role inthe interpretation of religious texts. Therefore, the scholars of Islamicjurisprudence have pointed out this fact of the language and reserved asection of this subject in their books.In this article, the meanings of some of these propositions, which arecited in the work of al-Sarakhsi, titled as Shams al-A'imma (400?-483/1009?-1090), written on Islamic jurisprudence, are examined. Firstly,the definition of letter/character is made, and then general informationabout the prepositions is given. Moreover, the meanings and patterns ofthe usage of prepositions in Usul al-Fiqh of Al-Sarakhsi are explained.In these explanations the opinions and statements of scholars, especiallythe scholars of the Hanafi School are mentioned. In the conclusion,some assessments are made.