18.5.4 exercise 4: sequence of tenses in relationship with conjunctions
In the case of conjunctions we have to distinguish sometimes whether we talk about a finished action or the start of an action. Select the option that is logical in the specific context. If you need more information go back to the chapter conjunctions. The principal logic behind is always the same, whether the conjunctions required the congiuntivo or the indicativo. Remember that in Italian in contrast to Spanish we use the future after quando if the action is going to happen in the future.