1. Tam asked Peter if he had gone to Hue three years ago.
2. Tuan asked Lan if Tuan and Hoa were late for class.
3. She asked me if i could speak Chinese.
4. Tam asked Thu if she would be there for five days.
Câu gián tiếp dạng câu hỏi: S+ asked+if/whether/từ để hỏi+ S+ V (lùi thì)
+ here-> there (một trong những thay đổi về trạng ngữ chỉ địa điểm)