1. Alice was walking alone in the woods when she suddenly heard footsteps behind her. Someone WAS FOLLOWING her. She was FRIGHTENED and she STARTED to run. Giải thích giúp mình phần in hoa ạ mình ko thấy dấu hiệu nào cả 2. When the crow DROPPED the cheese, the fox ATE it Trong trường hợp này có từ when thì 1 cái thì quá khứ tiếp diễn còn lại thì quá khứ tại sao cả hai đều quá khứ luôn ạ 3. It was a nice day. The sun WAS SHINING and a tortoise WAS SLEEPING in the sun. He opened his eyes and saw that an eagle was flying in the sky. “I want to fly like that!” the tortoise said. The eagle heard him and agreed to help. The eagle picked up the tortoise, and off they went. When they were flying very high in the sky, the eagle opened his claws for the tortoise to fly. But the poor tortoise FELL all the way down to earth. Mình cũng ko thấy dấu hiệu để sử dụng cả giải thích giúp mình ạ