11. But if you had not left the door open, the room would not be full of flies.
12. But if you had gone to bed at a reasonable hour last night you would not be tired this morning.
13. But if I had finished my report yesterday, I could begin a new project today.
14. But if I were you, I would have told him the truth.
15. But if I had known anything about plumbing I would fix the leak in the sink myself.
16. But if she had followed the doctor's orders, Anita would not be sick today.
Cấu trúc câu đk loại 1: If + S + V-HTĐ, S + will/can + (not) + V1
loại 2: If + S + V-QKĐ, S + would/could + (not) + V1
loại 3: If + S + had + P.P, S + would/could + have + P.P
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