Si necesitas transformar las oraciones directas en preguntas, debes emplear el auxiliar Does cuando el sujeto en la frase es He, She o It, y para You, They o We debes emplear el auxiliar Do.
Forma correcta: Does he like swimming? - Do you like cooking?.
Forma incorrecta: Does he likes swimming? - Do you likes cooking?.
Nota: Recuerda que en las preguntas afirmativas que contienen Does, el verbo no lleva “s” al final (likes, lives, goes).
Preguntas directas con What, Why, When, How y Who:
Why do you want this job?.
What is your name?.
When did you see the advertisement?.
How much do you earn?.
Where do you live?.
Who gave you my name?.
Which newspaper did you see the advertisement in?.
Nota: luego de colocar When, How o Who, emplea el auxiliar Do o Does, el sujeto y finalmente el resto de la oración. Con Who, Which or What no necesariamente debes utilizar los auxiliares.
Ejemplos:
What happened?.
Who saw you?.
Which company made a profit?.
