Когда Петров почувствовал себя хоро

Когда Петров почувствовал себя хорошо, он снова стал посещать занятия, ему не пришлось просить своих преподавателей о помощи.

Результаты (английский) 1:

When Petrov felt good, he again began to attend classes, he did not have to ask their teachers for help.

Результаты (английский) 2:

When Smith felt good, he was attending classes, he didn't have to ask their teachers for help.

Результаты (английский) 3:

When Petrov has felt well, he again became to attend classes, he would not have had to ask their teachers for help.