=>
81. Tom asked Mary if she had phoned her the day before.
82. He asked me if I had seen that film before.
83. She asked me if my school was near there.
84. Tom asked his friend if she went to school by bus.
85. I asked Mary if she could use a computer.
86. Mr.Ba asked me if my father lived there.
87. He asked me if I had ever seen a tiger.
88. The girl asked her brother if he was learning his lesson.
89. She asked me if he had lived with his grandfather.
90. She asked me if I would visit Dalat.
Câu tường thuật dạng Yes/No questions : asked sb if/whether S + V (lùi thì)
HTĐ -> QKĐ
HTHT -> QKHT
QKĐ -> QKHT
HTTD -> QKTD
Can -> Could
Will -> would