Объяснение:
I had been writing for 2 hours when he came home.
we had been cleaning up the room until 5 o'clock.
I will have been working at this factory for 20 years by the end of the summer.
Mary will have been studying English for 2 years by the time you return.
Объяснение:
I had been writing for 2 hours when he came home.
we had been cleaning up the room until 5 o'clock.
I will have been working at this factory for 20 years by the end of the summer.
Mary will have been studying English for 2 years by the time you return.