Đảo ngư theo câu điều kiểng loại 3 1. If I had been working at the restaurant last night, I would have waited on your table. 2. If they had been paying attention, they would have seen the sign marking their exit from the highway. 3. Carol would have answered the phone if she hadnt been studying. 4. If the sun hadnt been shining, we wouldnt have gone to the beach yesterday. 5. If the music hadnt been playing loudly at the restaurant, I would have heard everything Mr Lee said during dinner.