1 she thinks playing sports is very healthful

->she thinks it's

2 Jame spends twenty minutes walking to school every morning

->it takes

3 It takes me 20 minutes to do my homework

-> I spends 

4 I find losing weight very difficult

-> it's

`color{aqua}{\text{_Lunarzy}}`

`1` She thinks it's very healthful to play sports .

`-` S + think + S + be + adj + to V + O : Ai đó nghĩ ai đó như thế nào khi làm gì .

`2` It takes Jame twenty minutes to walk to school every morning .

`3` I spend `20` minutes doing my homework .

`-` Cấu trúc biến đổi giữa ''take'' và ''spend'' :

`<=>` It + take + O(người) + time + to V + O : Nó tốn ai đó bao lâu để làm gì .

`<=>` S(người) + spend + time + V-ing + O : Ai đó dành bao lâu thời gian làm gì .

`4` It's very difficult to lose weight .

`-` It + be + adj + to V : Nó như thế nào khi làm gì .

`1,` She thinks it's healthful to play sports

- It's + adj + to V : như thế nào khi làm gì

`2,` It takes Jame twenty minutes to walk to school every morning

- S + spend(s)/spent + t/gian + V-ing ...

= It + takes/took + O + t/gian + to Vbare-inf ...

`3,` I spend `20` minutes doing my homework

- S + spend(s)/spent + t/gian + V-ing ...

= It + takes/took + O + t/gian + to Vbare-inf ...

`4,` It's difficult to lose weight

- It's difficult to do sth : thật khó để làm gì