bày e vs kh cần giải thích

`10` Tom asked Mary if she had phoned him the previous day

`11` I asked the policeman if he knew how far it was to the station

`12` I asked Bill what time he had gone to bed the previous night

`13` The traveller asked me how long it took to get to London

`14` He asked me why I hadn't come to class the previous day

`15` The teacher asked John which book he was taking 

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`-` Câu tường thuật (Question - Yes/No) : 

`-` S + asked / wanted to know + (O/sb) + If / whether + S + V (lùi thì)

`-` Câu tường thuật (Question - Wh-word) : 

`-` S + asked / wanted to know + (O/sb) + Wh-word + S + V (lùi thì)

`-` Lùi thì : 

`+` QKĐ , HTHT `->` QKHT : (+) S + had + `V_(pp)` + .....

`+` HTĐ `->` QKĐ : (+) S + `V_(ed)` `/` `V_2` + ...

`+` HTTD `->` QKTD : (+) S + was/were + V-ing + ....

`-` Đổi thời gian : 

`+` Yesterday `->` The previous day

`+` Last night `->` The previous night

`\text{@ TheFallen}`