`1.` How did he go to school yesterday?

`-` by bike chỉ phương tiện `->` How

`-` Cấu trúc thì QKĐ: (Wh_) + did + S + V..?

`2.` How often should she brush her teeth?

`-` twice a day chỉ tần suất `->` How often 

`-` Cấu trúc: (Wh_) + aux + S + V..?

`3.` Who did you see going to the park this morning?

`-` Binh chỉ người `->` Who

`-` Cấu trúc thì QKĐ: (Wh_) + did + S + V..?

`4.` What does his sister do in the garden?

`-` cuts the flower chỉ hành động `->` What

`-` Cấu trúc thì HTĐ: (Wh_) + do/ does + S + V..? 

`5.` When will Andrey visit Ha Long Bay?

`-` next month chỉ khoảng thời gian (không cụ thể) `->` When

`-` Cấu trúc thì TLĐ: (Wh_) + will + S + V..?

#honglienxx9