Đáp án:

$2$ `:` 

`( - )` `:` My brother didn't spent his summer holiday on the farm.

`(  ?  )` `:` Did my brother spend his summer holiday on the farm ?

$3$ `:` 

`( - )` `:` The people weren't friendly.

`(  ?  )` `:` Were the people friendly ?

$4$ `:` 

`( - )` `:` Liz didn't enjoy her summer vacation last year.

`(  ?  )` `:` Did Liz enjoy her summer vacation lasr year ?

$5$ `:`

`( - )` `:` Nam wasn't absent from school yesterday.

`(  ?  )` `:` Was Nam absent from school yesterday ?

Thì HTĐ:

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

`( - )` `:` S `+` didn't `+` V_inf `+` O.

`(  ?  )` `:` Did `+` S `+` V_inf `+` O.

Cấu trúc thì quá khứ đơn với động từ thường

( + ) : S + V-ed / V2

( - ) : S + didn't + V nguyên mẫu

( ? ) : Did + S + V nguyên mẫu ?

Cấu trúc thì quá khứ đơn với tobe

( + ) : S + was / were + ... 

( - ) : S + wasn't / weren't + ... 

( ? ) : Was / Were + S + ... ?

Chủ ngữ là I / he / she / it thì đi với be là was / wasn't

Chủ ngữ là You / we / they thì đi với be là were / weren't

`2` : My brother didn't spend his summer holiday on the farm

Did my brother spend his summer holiday on the farm

` 3 ` : The people weren't friendly

Were the people friendly ?

` 4 ` : Liz didn't enjoy her summer vacation last year

Did Liz enjoy her summer vacation lasr year ?

` 5 ` : Nam wasn't absent from school yesterday ?

Was Nam absent from school yesterday ?