`1,` It was cloudy yesterday (DHNB: yesterday)

`2,` In `1990`, we moved to another city (DHNB: in `1990` - tgian trong quá khứ) 

`3,` She didn't go to the church five days ago. (DHNB: ago)

`4,` They were happy last holiday (DHNB: last holiday)

`5,` I didn't play football last Sunday. (DHNB: last Sunday)

----------------

Giải thích:

`@` QKĐ dạng tobe:

(`+`) S `+` was/were `+` adj/N..

(`-`) S `+` wasn't/weren't `+` adj/N..

(`?`) Was/Were `+` S `+` adj/N..?

`@` QKĐ dạng động từ thường:

(`+`) S `+` V2/V-ed `+` O

(`-`) S + didn't + V0 `+` O 

(`?`) Did + S + V0 `+` O ? 

`-` DHNB: yesterday, ago, last year/month/week, in the past, the day before,...

`->` Diễn tả 1 hành động, sự việc hoặc sự kiện nào đó diễn ra và đã kết thúc trong quá khứ.