Вам следовало бы позвонить Петрову

Вам следовало бы позвонить Петрову еще раз. Если бы вы дозвонились ему, он пришел бы на час раньше, и нам не пришлось бы ждать.

Результаты (английский) 1:

You should call the School again. If you phoned him, he would have come an hour earlier, and we would not have had to wait.

Результаты (английский) 2:

You should call Petrov again. If you phoned him, he would come an hour earlier, and we would not have to wait.

Результаты (английский) 3:

You should call Ramona again. If you would introduce yourself to him, he had come to the hour before, and we would not have had to wait.