Oppositional Subordinate Conjunctions introduce a circumstance or situation that has a somewhat clashing relationship with an event in the main clause. We will explore the following conjunctions:
quando = when, even when mentre = whereas, while mentre invece = whereas, while (informal, used mainly in spoken Italian) laddove = whereas, when on the contrary (formal)
Non capisco perché ti lamenti di essere stanco, quando ho guidato io tutto il pomeriggio. I don’t understand why you’re complaining about being tired, when I’m the one that drove all afternoon.
The main clause in the example above expresses perplexity regarding a statement previously made by an individual, while the subordinate clause elaborates on the source of such perplexity.