the tourists asked me "Which way is the post office? "

-> The tourists asked .... 

`color{white}{#MPhuc}`

`->` The tourist asked me which way the post office was.

`+` Ctruc câu gián tiếp :

`( ? )` S + asked/ wanted to know/ wondered + wh/h + S + V (  lùi thì )

`->` The tourists asked me which way the post office was.

`-` Cấu trúc câu gián tiếp : 

S + asked(+O)/wanted to know/required/wondered + Wh/h + S + V(lùi thì)