$11.$ If the soil were not badly polluted, the trees and grasses could grow here.
$12.$ If you eat a lot of sweets, you will have problems with your teeth.
$13.$ If the rain is heavy, it will prevent us from going out.
$14.$ If children don't play sport, it will make children feel sleepy and tired.
$15.$ If you don't stop talking, you won't understand the lesson.
$16.$ If you study hard, you will pass your exam easily.
$17.$ If I were you, I wouldn't throw those clothes away.
$18.$ If they get up early, they won't be late for school.
$19.$ If that man worked hard, he could earn money.
$20.$ If I knew the answer, I would tell him.
*Cấu trúc:
- Câu điều kiện loại 1: If + S + V (s/es), S + will + V.
- Câu điều kiện loại 2: If + S + V (Pii), S + would/ could/ might + V.
