1 : the pupils talked about the film they had watched
cấu trúc past perfect / thì quá khứ hoàn thành : s + had + v2
2 : last night, at 6pm, i was having dinner when my son still was playing basketball in the yard
cấu trúc past continuous / hiện tại tiếp diễn : s + was / were + v_ing
3 : mary last ate pizza 2 years ago
ate là quá khứ đơn của eat
4 : i studied hard before the exam
quá khứ study -> study thêm ed, chuyển y -> i
5 : yesterday, i was very tired as i hadn't sleep well for several
quá khứ đơn của be là was, cấu trúc quá khứ hoàn thành : s + hadn't + v2
6 : yesterday at this time, we were listening to the speech of the principal
cấu trúc past continuous / hiện tại tiếp diễn : s + was / were + v_ing
7 : we never had never see such a beautiful beach before we went to nha trang
had never seen : chưa bao giờ thấy
8 : i did not have money because i hadn't gone to the bank
cấu trúc quá khứ hoàn thành : s + hadn't + v2
9 : i left this town two months ago
quá khứ của leave là left
10 : yesterday i was cooking when my sister was washing the dishes
cấu trúc thì hiện tại tiếp diễn : s + was / were + v_ing
11 : where he had he put his wallet before leaving ?
cấu trúc quá khứ hoàn thành : s + had + v2
12 : when we came into class the teacher had been explaing for 15 minutes
cấu trúc quá khứ hoàn thành : s + had + v2 / v_ing
13 : by the time i met you i had got married for five years
14 : last night, i was washing my hair when you rang
s + was / were + v_ing / rang là quá khứ của ring
15 : she ever has never seen a zebra before she visited the zoo last week
has never seen : chưa bao giờ thấy
nếu được thì cho tớ tlhn, 5sao và cảm ơn ạa !