`A` 

`1` He spent half an hour writing the essay

`2` It takes me three hours every day to finish my homework

`3` It takes twenty minutes to walk to school every morning

`4` Minh took most of his free time to do volunteer work at a locak hospital 

`-` spend time doing sth : dành thời gian làm gì

`=` take sb time to do sth : ai đó mất bao nhiêu thời gian làm gì

`B` 

`1` Her book is different from mine

`2` This show is not different from the show we saw last week

`3` I think painting is not different from drawing

`-` the same as : giống như

`-` S1 + be + the same + (danh từ) + as + S2

`-` S1 + be + different from + S2

`-` different from : khác với 

`A.`

Spend + time + V-ing = Take + O +Time + To V

`1.` He spent half an hour writing the essay 

`2.` It takes me three hours every day to finish my homework.

`3.` It takes me twenty minutes to walk to school every morning.

`4.` Minh took most of his free time to do volunteer work at a local hospital.

`B.` 

S + be + not the same as + S 

`->` S + be + different from + S 

`1.` Her book is different from mine