- Câu điều kiện loại 2: [If + thì quá khứ đơn], [would + động từ nguyên mẫu]
- Câu điều kiện loại 3: [If + thì quá khứ hoàn thành], [would + have + V3/V-ed]
1. If Phong had enough money, he could travel abroad (loại 2)
2. If I drove too close to the animals on safari, they would get scared (loại 2)
3. If Tom had a passport, he could travel abroad (loại 2)
4. If I had had enough money, I would have bought it (loại 3)
5. If tourists didn't throw little in the river, the water wouldn't be polluted (loại 2)
6. If I could swim, I would go scuba-diving with you (loại 2)
7. If I had known the test yesterday, I would have studied for it (loại 3)
8. If these students worked hard, they could pass the exam (loại 2)
9. Unless you are careful, you will cut yourself with that knifes
Unless = If not: Nếu không
10. Unless we had more rain, our crops wouldn't be better
