This tense is used extremely rare
an action accomplished before a given future moment
an action in progress at a definite future moment
some recurrent actions in the future
a single point action that will be completed in the future
an action occupying a whole period of time in the future
some permanent future actions generally characterizing the person denoted by the subject
an action which the speaker expects to take place in the future in the natural course of events
a succession of actions in the future
