tense - a grammatical category of verbs used to express distinctions of time

present progressive, present progressive tense - a tense used to express action that is on-going at the time of utterance

past progressive, past progressive tense - a progressive tense used to describe on-going action in the past; "`I had been running' is an example of the past progressive"

future progressive, future progressive tense - a progressive tense used to express action that will be on-going in the future; "`I will be running' is an example of the future progressive"