Приведите по 3 примеры по Second и Third Conditional

second: if all ou cars used vegetable oil,we wouldnt produce so much CO2. If I were you I would study English by all means. If people knew their future they would make fewer mistakes. third:If it had not rained last night we would have visited our friends If I had known his address I would have written him at once If we had bought that house, we would have had to rebuild the kitchen