Question

the boy said to me"when did you come back home?"(narration change) 2.my father said to me"go and fetch a glass of water for me"(narration change)

Answer 1

1) the boy asked me when I had gone back home.
2) my father asked me to go and fetch a glass of water.

the second sentence is imperative sentence. so you should use words like requested, asked etc.. and after that weird you should use an infinitive (to)