Правила По Английскому: Past continuous ( 6 клаcc) C примерами

i was
you were
he was
she was
it was
we were
you were
they were
підмет(was/were)присудок (1 форма) + ing
заперечне речення : підмет  (was/were) + not  присудок (1ф) + ing
питальне:  (was/were) підмет присудок(1ф) + ing
я читала книгу у той момент
i was reading the book at that moment
I was not reading the book at that moment
Were you reading the book at that moment
 

допоміжні слова
at ... o'clock 
at that time
from ... till..o'clock