$1.$ If he didn't have to study for his exam, he could go out.
$2.$ If she weren't lazy, she could pass the exam.
$3.$ If he pays me tonight, I will have enough money to buy a car.
$4.$ If he didn't smoke too much, he could get rid of his cough.
$5.$ If she weren't very shy, she would enjoy the party.
$6.$ If she didn't forget her homework, the teacher wouldn't be angry.
$7.$ If he took exercises, he wouldn't be so unhealthy.
$8.$ If we weren't late, we could attend the meeting.
$9.$ If she weren't tired, she wouldn't stop working.
$10.$ If they weren't selfish, they would be happy.
$11.$ If I ate much, I wouldn't feel hungry.
$12.$ If it didn't rain, they wouldn't stay at home.
$13.$ If it were cheap, he would buy it.
$14.$ If the film weren't boring, we would watch it.
$15.$ They would travel by car if they didn't get car sickness.
$16.$ If you didn't work hard, you wouldn't get exhausted.
$17.$ If she didn't run too much, she wouldn't feel tired.
$18.$ If the weather isn't snow, we will go to school.
$19.$ If you make me some coffee, I'll give you one of my biscuits.
$20.$ If you weren't lazy, you wouldn't be poor.
$21.$ If I get a work permit, I will stay for another month.
$22.$ If Mary didn't have to do her homework, she would go with us.
$23.$ We would not stay at home if the weather weren't too cold.
$========="$
- Câu điều kiện loại $I$: If + S + V (s/es), S + will + V.
+ Diễn tả một sự việc có khả năng xảy ra ở hiện tại.
- Câu điều kiện loại $II$: If + S + Thì quá khứ đơn , S + would/ could/ might.
+ Nói về một sự việc không có thật, không thể xảy ra ở hiện tại.