Purpose: Interrupted action – the ongoing action takes past continuous and the interruption takes past simple.
You’ll often see “while” + past continuous.
- The shippers damaged the product while they were unloading it.
- I didn’t pick up the phone because I was eating dinner.
- The product was damaged while it was being unloaded.
Important pronunciation note about "being" vs "been":
“Being” as in “while it was being shipping” is pronounced “bee – ing.” This word has a long pronunciation.
“Been” as in “the product has been shipped” is pronounced “bin.” This word has a short pronunciation.
Don't use past continuous for no reason
INCORRECT: What were you doing last weekend?
CORRECT: What did you do last weekend?
INCORRECT: Last weekend, I was just watching TV.
CORRECT: Last weekend, I just watched TV.