- О действии, которое случилось раньше другого действия в прошлом (e. g. I had written a letter before I went to work.)
I had + V-ed/ -d (если глагол оканчивается на -е)
I had studied English before I moved to Moscow.
I had + V3
I had known him before I finished school.
Had I + V-ed/ V3?
Had she made a lot of friends before she left England?
Where + had I + V-ed/ V3?
Where had you been before you came home?
I had not/ hadn't + V-ed/ V3
I hadn't been to Asia before I came to Thailand.