`1.` I usually spend one day making a model.

`-` It + takes + sb + time + to V-inf

`=` S + spend + time + V-ing

`2.` Jane is keen on making crafts.

`-` adore + V-ing `=` tobe keen on + V-ing : thích làm gì

`3.` My brother is into playing computer game.

`-` tobe into V-ing/N : thích làm gì/cái gì

`4.` I find riding a horse exciting.

`-` find sth adj : cảm thấy cái gì như thế nào

`5.` My mother took up playing golf 2 months ago.

`-` take up V-ing/N : bắt đầu cái gì

`1)` I usually spend a day making a model.

`->` S + trạng từ chỉ tần suất + V-s/es ...

`->` spend  time V-ing: dành thời gian làm gì

`2)` Jane is keen on making crafts.

`->` keen on V-ing: thích làm gì

`3)` My brother is into playing computer game.

`->` be into sth: có hung thú với cái gì

`4)` I find riding a horse exciting.

`->` find sth adj/adv: thấy cái gì thế nào

`5)` My mother took up playing golf `2` months ago.

`->` take up sth: bắt đầu cái gì

@magnetic