Срочно помогите пожалуйста с домашкой по английскому! нужно составить 5 предложений по правилу Past Perfect

1) I had been in the office by 7 a.m already. 2) I had already finished my work by the time he came 3) He wanted me to join the tennis club. But I had already joined the football club  4)  I wanted to go to school with him. But he had already gone. 5) My parents had returned from their work by the time I came from the school