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