Less Common Tenses
The past perfect progressive and future perfect progressive are not commonly used in English. They indicate action which occurs continuously over a period of time, when another action or event intervenes. Some examples are included here for your reference.
Past Perfect Progressive
- We had been playing baseball for two hours yesterday when it started to rain.
- I had been sending out applications for months. Finally, I got a phone call.
Future Perfect Progressive
- We will have been flying for two hours when we cross the Mississippi River.
- In August, I will have been studying here for three years.
Often the past perfect progressive and future perfect progressive can be replaced by their counterparts: past perfect or future perfect.
- I had been driving for hours when I stopped to rest.
- I had driven for hours when I stopped to rest.
- By the time I get to Tempe, I will have been traveling all day.
- By the time I get to Tempe, I will have traveled all day.