MAKE CONDITIONAL SENTENCES
1. If you don’t keep silent, you’ll wake the baby up.
2. I could have written to Lan if If I had known her address.
3. If there were no air, we would die.
4. If the boy were old enough, he could go to school.
5. If it hadn’t been very cold yesterday, we could have gone swimming.
6. If she were not often absent from class, she could keep pace with her classmates.
Ba mẫu câu điều kiện cơ bản:
Loại 1: có thể xảy ra ở hiện tại hoặc tương lai: If S + V (s/es), S + will/can/ ... + V
Loại 2: không có thật ở hiện tại: If S + V2/ed ("to be" biến thành were cho tất cả S), S + would/could... + V
Loại 3: không có thật ở quá khứ: If S + had + V3/ed, S + would/could... + have V3/ed