- to say that smth had been happening for a period of time before smth else happened (выражение действия, которое длилось определённый отрезок времени до наступления следующего действия в прошлом): We’d been playing tennis for an hour when it started to rain heavily. /I was very tired. I’d been working hard all day.
+ had been + Ving
I had been waiting all day before she came.
- hadn’t been + Ving
They hadn’t been listening that’s why they couldn’t answer.
? Had… been + Ving
Had they been dancing before the competition?
Had he been training before?
Markers: all day, for