📖 Hypotheses Type 3 — Changing the Past\n\nYou know Type 2 (Si + Imparfait -> Conditionnel). Now, let's learn Type 3. This is used to express a hypothetical situation in the past that cannot be changed. It is entirely unreal.\n\nTHE RULE: The Past Hypothesis\n🔤 Si + Plus-que-parfait [Condition], Conditionnel Passé [Result]\n\nIn English: "If I had known, I would have come."\nIn French: "Si j'avais su, je serais venu."\n\nEXAMPLES:\n\n🔤 "Si tu m'avais appelé, je t'aurais aidé."\n(If you had called me, I would have helped you. -> But you didn't call, so I didn't help.)\n\n🔤 "S'il avait fait beau, nous serions allés à la plage."\n(If the weather had been nice, we would have gone to the beach.)\n\n🔤 "Je n'aurais pas raté mon train si je m'étais levé plus tôt."\n(I would not have missed my train if I had gotten up earlier.)\n\nREVIEW OF ALL 3 "SI" CLAUSES (The ultimate cheat sheet):\n\nType 1 (Likely Future): Si + Présent -> Futur\n- Si j'ai de l'argent, j'achèterai une voiture. (If I have money, I will buy a car.)\n\nType 2 (Unlikely Present): Si + Imparfait -> Conditionnel Présent\n- Si j'avais de l'argent, j'achèterais une voiture. (If I had money, I would buy a car.)\n\nType 3 (Impossible Past): Si + Plus-que-parfait -> Conditionnel Passé\n- Si j'avais eu de l'argent, j'aurais acheté une voiture. (If I had had money, I would have bought a car.)\n\nA B1 PRO-TIP:\nNative speakers use Type 3 constantly to express regret or relief. Memorize the phrase "Si j'avais su..." (If I had known...).