=> 18. A had arrived 19. B had been 20. B was going to be 21. A told me (told sb that) 22. C if I had seen 23. A remind sb to V : nhắc nhở ai làm gì Câu tường thuật dạng Yes/No questions : asked sb/wondered if S V(lùi thì) Câu tường thuật -> lùi thì HTHT -> QKHT QKĐ -> QKHT is/am/are going to V -> was/were going to V
