$\text{@su}$
`1`, was / haven't gone
`->` thì QKĐ, có last week / thì HTHT, có for two days
`2`, wasn't / went
`->` thì QKĐ, có yesterday
`3`, were you / came / was
`->` thì QKĐ + cấu trúc "hành động chen ngang"
`4`, did he visit / visited
`->` thì QKĐ, có last
`5`, attended / was
`->` thì QKĐ, có last year
`6`, Were they / flew
`->` thì QKĐ, dựa vào câu hỏi
`7`, spent / took
`->` thì QKĐ, có last year
Bonus: Thì quá khứ đơn:
- S + V-ed + O
- S + was/were + ....
$\text{#BTS}$