Giải thích:

`@` 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. 

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

`1,` didn't buy

`2,` didn't talk

`3,` came

`4,` didn't close

`5,` didn't have

`6,` didn't drive 

`7,` walked

`8,` had

`9,` traveled

`10,` sang

                    Thì quá khứ đơn ( Past Simple )

1. She didn't buy a new ruler yesterday. (  chia not buy thành didn't buy )

2. He didn't talk with his parents about his vacation in Da Lat last year . ( not talk-didn't talk )

3. They came to school with me yesterday. ( come-came)

4. The window didn't close yesterday. ( not close - didn't close )

5. We didn't have a lot of friends in Ha Noi. ( not have - didn't have )

6. Mary didn't drive to work last month . (not drive - didn't drive)

7. We walked to school last year . ( walk - walked )

8. My family had dinner late last night . ( have - had )

9. My parents traveled to Thailand by plane last year. ( travel - traveled )

10. Linda sang an English song last week. ( sing - sang )

Chúc bạn học tốt !

#ilikestudymaths