cấu trúc past simple ( quá khứ đơn )
(+) S + ved + ...
(-) S + didn't + v ..
(?) Did +s +v ...?
dấu hiệu nhận biết : ago, yesterday , in + năm qk , ..
cấu trúc past perfect ( quá khứ )
(+) S + had +p2
( -) S + had + not + p2
(?) Had + s+p2
dấu hiệu nhận biết :Until then, by the time, prior to that time, before, after, for, as soon as ,by , before, after, when by, by the time, by the end of + time in the past …
2. had gone / had done ( after - quá khứ hoàn thành )
3. had getten ( by the time - qk hoàn thành )
4. had just finished ( just - qk hoàn thành ) / rang ( when - qk đơn )
5. had already had ( already - qk hoàn thành ) / got up ( when - qk đơn )
6. had learnt - was
7. had just come - met
8. had arived - esscoped
