原因與目的是人們在認識世界和改造世界過程中極其重要的主觀因素。現代俄語的趨勢是區分並細化表達二者的語言手段，它們各自對應著豐富的詞彙和句法結構。但同時，這種區分也不是涇渭分明的。原因與目的在語言表達上既相互區別，又交叉融合。詢問原因與目的的疑問結構可以發生語用轉向，表達各種間接言語行為。在問答統一體範圍內，有關原因和目的的「問」與「答」會受到語言內部和外部多重因素的影響。本研究能夠幫助深入理解這兩個重要的語義，同時也能更好地服務於俄語教學。

The causes and purposes are extremely important subjective factors in the process of understanding and transforming the world. In modern Russian, there is a tendency to specify and refine the linguistic means of their expression, each of which corresponds to a rich vocabulary and syntactic constructions. However, their distinction is not clear-cut. There are both differences and similarities in the linguistic expression of these two categories. The interrogative constructions referring to causes and purposes are capable of expressing various indirect speech acts. Within Q-A unity, the "question" and "answer" about causes and purposes are influenced by numerous factors, both linguistic and extra-linguistic. This study can help deepen the understanding of these two important categories, and can better serve the teaching and learning of RFL.