НАРОД ПЛИЗ ПОМОГИТЕ! Надо составить два предложения, 0 типа conditional. Два…

Нулевой я не знаю какой пример можно привести. Первый: if it snows, they will go skiing If i see Jane, i will invite her to my birthday partyВторой: if i knew the answer, i would tell you If i were you, i would learn GermanТретий: If the teenager had collected his thoughts, he would have won the competition If i had been in Moscow at that time, i would have helped him