when

used to refer to a time in the past, present or future

cuando, en el momento en que

• when + clause

Collocations when you arrive · when the bell rings

• When I arrived, she was already gone.

  Cuando llegué, ella ya se había ido.

used to refer to a situation or event that is the condition for something else happening

cuando, si

• when + clause

Collocations when you have finished · when the weather improves

• When you finish your homework, we can go out.

  Cuando termines tu tarea, podemos salir.

a particular time or period of time in the past, present or future

cuándo, momento en que

• the when

Collocations what is the when? · when do you want to meet?

• The exact when of his arrival is not known.

  El momento exacto de su llegada no se conoce.

used to refer to a time or period of time in the past, present or future when something happened or will happen

cuándo, momento en que

• the when

Collocations what is the when? · when do you want to meet?

• The when of the event has not been decided yet.

  La fecha del evento aún no se ha decidido.