1. How long does it takes you to fly from Ha Noi to Ho Chi Min City?

-->How long does it take + O + to V+......(Mất bao nhiêu thời gian cho ai để làm gì)

2. I used to go swimming every Thursday when I was at school.

-->S + used to + V (diễn tả một thói quan trong quá khứ mà bây giờ không làm nữa)

3. Thousands of people lined the streets in order to watch the massive colorful parade

--> In order to + V (để làm gì)

`1`. How long does it take you to go from Ha Noi to Ho Chi Minh city by plane?

`⇒` Cấu trúc: How long does + it + take + O + to V?

`2`.  I used to go swimming every Thursday when I was at school.

`⇒` Cấu trúc: S + used to + V

`3`. Thousands of people lined the streets in order to watch the massive colorful parade.

`⇒` Cấu trúc: S + V + in order to + Vo