`28` We have learned English for `4` years 

`=>` S + started + Ving / to - V + time + ago

`=` S + has / have + Vpp + for + time  

`29` It takes me `20` minutes to walk to school 

`30` It took us `5` hours to get to London 

`31` It takes me a day to paint this house 

`32` We spent two months doing that work 

`33` Mr Hoang spent half an hour walking to work yesteday 

`34` He spent twelve hours flying from Hanoi to London 

`35` It only takes us half an hour getting to the post office

 `=>` Cấu trúc chung từ câu `29->35` : 

`-` S + spends / spend / spent + time + Ving + O 

`=` It takes / took + O + time + to + V  : Mất bao nhiêu thời gian làm việc gì đó

$-$ S + began/ started + to V/ V-ing + in + time = S + have/ has + V3 + since + time.

- "Bắt đầu làm gì từ năm bao nhiêu ... = Đã làm gì được bao  lâu ...".

$28.$ We have learned English for 4 years.

$------------$

$-$ It takes + O + time + to V = S + spend + time + V-ing: mất bao lâu để làm gì.

$29.$ It takes me 20 minutes to walk to school.

$30.$ It took us 5 hours to get to London.

$31.$ It takes me a day to paint this house.

$32.$ We spent two months doing that work.

$33.$ Mr. Hoang spent half an hour walking to work yesterday.

$34.$ He spent twelve hours flying from Hanoi to London.

$35.$ It only takes us half an hour to get to the post office.