That company has been making surfboards since the 1960s.
present perfect progressive
present progressive
past perfect progressive
past progressive
Hunter had been playing a video game when his computer crashed.
past progressive
present progressive
past perfect progressive
present perfect progressive
As of next month, my best friend and I will have known each other for 12 years.
past progressive
future perfect progressive
present perfect progressive
present progressive
present perfect progressive
present progressive
past perfect progressive
past progressive
Hunter had been playing a video game when his computer crashed.
past progressive
present progressive
past perfect progressive
present perfect progressive
As of next month, my best friend and I will have known each other for 12 years.
past progressive
future perfect progressive
present perfect progressive
present progressive