The language of prayer used by Imam Sajjad (AS) in creating culture is in fact one of the common and important elements between all human beings and cultures and has a special place in Shiite culture. The truth of the language of prayer has given it characteristics distinguishing it from other languages. The condition sentence is one of the syntactic styles used in Sahifa Sajjadieh. Due to the frequency of conditional sentences in Sahifa Sajjadieh, such sentences have been considered by scholars of religious texts. In this article, conditional sentences are investigated. Because understanding this type of sentences helps to understand and comprehend the text of Sahifa Sajjadieh. Examining conditional sentences is the key point that lie behind such sentences and every researcher should pay attention to them in his studies. This article identifies and examines these points as much as possible by referring to Sahifa Sajjadieh and tries to answer the following questions: Are conditional words used only for the ambiguous? What conditional styles are used in the Holy Quran and what do they mean? Part of the result of the present study shows that the meaning of condition sentences varies depending on the conditional word. The condition "أن" is not always used in the meaning of doubt and ambiguity, and it is also used in the sense of certainty by considering goals.