Scenario is a description technique which has attracted much attention not only from practitioners but also from researchers. Literature on this topic shows the possibilities that this description technique provides to enhance the understanding of task-related descriptions and the communication among stakeholders. On the other hand, the idea of pattern, as a description of a problem which occurs over and over again in our environment and its solution, has also attracted lots of attention, specially in software design. This paper describes an initial taxonomy of domain-independent-scenario patterns and proposes a preliminary process to use this taxonomy for scenario construction.