Đáp án:

`1.`  We are having an English test next Monday.

`( - )` `:` We aren't having an English test next Monday.

`(  ?  )` `:` Are we having an English test next Monday ?

`2.`  The people were friendly.

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

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

`3.`  She goes to the gym twice a week.

`( - )` `:` She doesn't go to the gym twice a week.

`(  ?  )` `:` Does she go to the gym twice a week ?

`4.`  Liz enjoyed her summer vacation last year.

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

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

`5.`  Nam will be absent from school tomorrow.

`( - )` `:` Nam won't be absent from school tomorrow.

`(  ?  )` `:` Will Nam be absent from school tomorrow ?

Thì HTTD:

`( + )` `:` S + is / am / are + Ving + O.

`( - )` `:` S + isn't / am not / aren't + Ving + O.

`(  ?  )` `:` Is / Am / Are + S + Ving + O ?

Thì QKĐ: `-` Động từ tobe

`( + )` `:` S + was / were + O.

`( - )` `:` S + wasn't / weren't + O.

`(  ?  )` `:` Was / Were + S + O ?

Thì HTĐ:

`( + )` `:` S + V ( s / es ) + O.

`( - )` `:` S + don't / doesn't + Vinf + O.

`(  ?  )` `:` Do / Does + S + Vinf + O ?

Thì QKĐ: `-` Động từ thường

`( + )` `:` S + V2 / Ved + O.

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

`(  ?  )` `:` Did + S + V_inf + O ?

Thì TLĐ:

`( + )` `:` S + will + Vinf + O.

`( - )` `:` S + won't + Vinf + O.

`(  ?  )` `:` Will + S + Vinf + O ?