`1.` He finds making models interesting.

Cấu trúc:$S+find+Ving+adj$

`2.` Money isn't as important as health.

Cấu trúc:$S_1+tobe+not+as+adj+as+S_2$

`3.` Huy has played the piano since he was child.

Cấu trúc:$S+have/has+V(ed)/V_2+...$

`4.` Because they were sick yesterday, they didn't go to school.

$Because+clause($nguyên nhân$),+clause($kết quả$)$

`5.` You should do exercise regulary.

Cấu trúc:$S+should+V(inf)+...$

1. He finds making model interesting

⇒cấu trúc : Find + V_ing 
2. Money is not as important as health

⇒Cấu trúc : not as ... as ( so sánh ko bằng )
3. Huy has played piano since he was a child

⇒Since là dấu hiệu nhận biết của HTHT 
4. Because they were sick yesterday so they didn't go to school

⇒ Cấu trúc : Because + clause ( nguyên nhân )
5. You should exercise regularly

⇒ S+ should + V_inf