Em ơi, anh học english!

3.2.2 Past Progressive (thì quá khứ tiếp diễn):

a) Công thức:

Chu tu + tro dong tu "to be" + verb-ing

b) Ví dụ:

I was watching TV when she came home.
Martha was watching television while John was reading a book.

Một hành động đang xả y ra tạ i một thời điểm xác đị nh trong quá khứ :

Ví dụ:

Martha was watching TV at seven o’clock last night.
What were you doing at one o’clock this afternoon?
Henry was eating a snack at midnight last night.