Is it possible to assign the sub-tasks for a particular user story to different sprints? For example, we have a project that has a User Story comprised of several sub-tasks that all together will take about 5 weeks. Their sprints are 2 weeks long. They don't want to break the story into two separate stories, but instead want to have some of the sub-tasks in one sprint, and the rest in another. Currently, they're having to let the ones they didn't get done fall into the backlog at the end of a sprint, but that's not ideal as it skews their stats. Is there a way to organize sub-tasks in the sprints separately from their parents?
Any help or clarification would be appreciated.
Thanks!