Đáp án + Giải thích bước giải:

* Câu tường thuật (dạng Yes/No question): S + asked + O + (that) + S + V/mdv/tobe (lùi 1 thì)

* Câu tường thuật dạng câu kể: S + said/told + O + (that) + S + V/mdv/tobe (lùi 1 thì)

- Thì HTĐ lùi về thì QKĐ: go → went, have → had

- Thì QKĐ lùi về thì QKHT: see → had seen

- Thì HTTD lùi về thì QKTD: leaving → was leaving

- tomorrow → the next day/the following day

- yesterday → the day before/the previous day

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12. She asked me if i had many friends

13. I asked Mai if she went for a walk the day before/the previous day

14. He asked me how many aliens I had seen

15. Olive told Chau she was leaving VN the next day/the following day

she asked me if i had many friends

i asked Mai if she went for a walk the before day

he asked me how many aliens i had seen

Olive told Chau (that) she was leaving VN the next day