Rule reminder
Modal clauses with 'come se' always create a contrast between appearance and reality. The main clause describes the appearance (how something looks/seems); the 'come se' clause describes the unreal comparison. Understanding this contrast is essential for interpreting literary texts and formal Italian. The speaker uses 'come se' to signal: 'I am not asserting this is true — I am noting a resemblance to something unreal.'
«La città sembrava deserta, come se tutti gli abitanti fossero fuggiti.» What does this sentence tell us?