Cấu trúc chủ yếu : Thì QKĐ ( CPĐ `-` CNV ) :

`-` ĐT Tobe :

`+` CPĐ : S + wasn't / weren't + adj / n

`+` CNV : Was / Were + S + adj / n ?

`-` ĐT Thường :

`+` CPĐ : S + didn't + V

`+` CNV : Did + S + V ?

`4`.

`( - )` My sister didn't go home very late last night

`( ? )` Did your sister go home very late last night ?

`5`.

`( - )` He didn't buy 2 pairs of socks two days ago

`( ? )` Did he buy 2 pairs of socks two days ago ?

`6`.

`( - )` She didn't take photos of me last week

`( ? )` Did she take photos of you last week ?

`7`.

`( - )` She didn't get to school on time last night

`( ? )` Did she get to school on time last night ?

`8`.

`( - )` They weren't with some of their friends yesterday evening

`( ? )` Were they with some of their friends yesterday evening ?

`9`.

`( - )` That girl didn't swim across the river last month

`( ? )` Did that girl swim across the river last month ?

`10`.

`( - )` Phong didn't do his homework last night

`( ? )` Did Phong do his homework last night ?

`\text{@ TheFox}`