Объясните, ,следующие формы времён в предложениях: 1)jane had wanted to be a nurse ever since she was a child. 2)jane and anne had been friends for a long time and lived in the same street. 3)i had broken arm but nerses here.

1) Jane HAD WANTED to be a nurse ever since she was a child. Состояние, начавшееся в указанный момент в и длившееся до более позднего подразумеваемого момента.
2) Jane and Anne HAD BEEN friends for a long time and lived in the same street. Состояние и действие, длившиеся некоторое (долгое) время до более позднего подразумеваемого момента.
3) I HAD BROKEN arm but nerses here. Событие произошедшее до подразумеваемого момента в в предложении опечатки).