Đáp án:

`1.`  How long does it take you to get to school ?

`-` Cấu trúc `:` How long does it take + S + to do sth + O ?

`2.`  He is not interested in buying a new house.

`-` HTĐ ( ĐT tobe `-` CPĐ ) `:` S + is / am / are + not + O.

`-` Interested in + Ving `:` Thích thú làm gì đó

`3.`  I was playing badminton with Nam when my friends came.

`-` Cấu trúc `:` S + was / were + Ving + O + when + S + V2 / Ved + O.

`->` Diễn tả một hành động đang diễn ra, một hành động ngắn xen vào.

`1.` How long does it take you to get to school

`=>` How long does it take + S +to do sth + O

`2.` He is not interested in buying a new house

`=>` Interested in + Ving: thích làm gif

`=>` Thì hiện tại đơn

`=>` S + tobe + not + ...

`3.` I was playing badminton with Nam When my friends came

`=>` Thì quá khứ tiếp diễn

`=>` S + was/were + Ving + O + When + S + V2/ed + O