1   Consideremos a frase seguinte na interrogativa directa do tipo yes/no:
 
He asked, "Are you all right?"
 
 
Para convertê-la em interrogativa indirecta, siga os seguintes passos:
 
(a) comece por:
 
He asked ...
 
 
(b) introduza o pronome pessoal me (como opção):
 
He asked (me) ...
 
 
(c) adicione if:
 
He asked (me) if ...
 
 
(d) mude a ordem das palavras "verbo + sujeito" (are you) para "sujeito + verbo" e recue o tempo verbal para o passado:
 
He asked (me) if I was ...
 
 
(e) adicione o resto da frase da interrogativa directa:
 
He asked (me) if I was all right
 
 
(f) termine a frase com ponto final:
 
He asked (me) if I was all right.
 
 
NOTA: Repare na ausência dos recursos gráficos na interrogativa indirecta (que são somente empregues na interrogativa directa): a vírgula (,), as aspas ("...") e o ponto de interrogação (?).
 
 
 
  2   Os passos apresentados no ponto anterior aplicam-se quando os verbos são do tipo be (principal ou auxiliar), have (auxiliar) e modais (can, will, may, etc.):
 
 
He asked, "Is Susan tall?"
He asked (me) if Susan was tall.
 
He asked, "Is Mary coming?"
He asked (me) if Mary was coming.
 
He asked, "Have you done the homework?"
He asked (me) if I had done the homework.
 
He asked, "Can you swim?"
He asked (me) if I could swim.
 
He asked, "Will I see you again?"
He asked (me) if he would see me again.
 
 
 
  3   Os verbos auxiliares do, does, did (nas interrogativas directas) desaparecem nas interrogativas indirectas:
 
 
He asked, "Do you know Jane?"
He asked (me) if I knew Jane.
 
He asked, "Does she know you?"
He asked (me) if she knew me.
 
He asked, "Did you see Peter?"
He asked (me) if I had seen Peter.
 
 
 
  4   Tanto if como whether podem ser empregues nas interrogativas indirectas, embora o primeiro seja o mais comum:
 
 
He asked, "Do you know Jane?"
He asked if (or whether) I knew Jane.
 
 
 
  5   Emprega-se whether quando existe alternativas:
 
 
He asked, "Do you want tea or coffee?"
He asked (me) whether I wanted tea or coffee.
 
 
 
  6   Quando uma interrogativa directa termina em or not, existe duas formas de convertê-la em interrogativa indirecta:
 
 
He asked, "Do you want tea or not?"
He asked if (or whether) I wanted tea or not.   ou
He asked whether or not I wanted tea.   (não  if or not)