$#Kimm$

1. i was not at the beach yesterday 

DHNB: Yesterday

2. They were not at the zoo last Sunday

DHNB: last Sunday

3. We did not watch TV at home last night

DHNB: last night

4. I did not study English two days ago

DHNB: ago

5. Mai did not go to Nha Trang last week

DHNB: last week

6. Her sister did not swim last week.

DHNB: last week

*Cấu trúc thì qua khứ đơn: 

S + did not + V (nguyên mẫu)

S + was/ were + not

I wasn't at the beach yesterday

They weren't at the zoo last Sunday

We didn't watch TV at home last night

I didn't study English two days ago

Mai didn't go to Nha Trang last week

Her sister didn't swim last week