giúp ttoi với ạ help me    

71. Bill said to me what country I came from 

72. He said to her where she had spent her holiday the previous summer

73. He said to Mary that what she was going to study 

74. Peter asked me what I thought of the canteen coffee

75. He said to her where she had been last night 

76. Tom said to the girl when she had had this picture taken 

* Lý thuyết về câu tường thuật : 

- Lùi thì : 

+ Hiện tại đơn --> Quá khứ đơn 

+ Hiện tai hoàn thành  / quá khứ đơn --> quá khứ hoàn thành 

+ Hiện tại tiếp diễn --> quá khứ tiếp diễn 

+ can --> could   + will --> would 

- Lùi thời gian : 

+ ago --> before / previous 

+ tomorrow --> the next / following day 

------ Chúc bạn học tốt %_% -----------

`71` .Bill asked me what country I came from 

`->` lùi thì : HTĐ `->` QKĐ

`72` .he asked her where she had spent her holiday the previous summer

`->` lùi thì : QKĐ `->` QKHT

                   last summer `->` the previous summer 

`73` .He asked Mary what she was going to study

`->` lùi thì : TLTD `->` QKTD

`74` .Peter asked me what I thought of the canteen coffee 

`->` lùi thì : HTĐ `->` QKĐ

`75` .He asked her where she had been the previous night 

`->` lùi thì : QKĐ `->` QKHT

                   last night `->` the previous night

`76` .Tom asked the girl where she had had this picture taken

`->` lùi thì : QKĐ `->` QKHT

----------------------------------------------------------------------

`=>` Cấu trúc trần thuật câu hỏi có từ để hỏi : S `+` asked `+` O /wondered/wanted to know `+` wh-word `+` S `+` V (lùi thì) 

`=>` Cấu trúc trần thuật câu hỏi không có từ để hỏi : S `+` asked/wondered/wanted to know `+` if/whether `+` S `+` V(lùi thì)