Если бы помог своей сестре с домашн

Если бы помог своей сестре с домашним заданием она бы не получила плохую отметку

Результаты (английский) 1:

If helped his sister with homework, she would not have received a poor mark

Результаты (английский) 2:

If it helped his sister with homework she would not have received a bad mark

Результаты (английский) 3:

if helped his sister with her homework, she would have received a bad mark