1)by the time he was 14 he had already wrote his first book 2)he had knew where to go because he had been there before 3)she became famous she had made her first intention в каждом предложений есть по 1 ошибки.наудите м исправтьте .тема: past perfect

1) By the time he was 14 he had already written his first book.
2) He knew where to go because he had been there before.
3) She became famous when she had made her first invention.