Сделай в отрицание Richard was seven last year. Robert’s friend was at the swimming pool with his father last week.
His parent’s were at home yesterday evening.
Mr Smith were in Africa.
Kate’s father was in America

Richard wasn't seven last year

Robert's friend wasn't at the swimming pool with his father last week

His parent's weren't at home yesterday evening

Mr Smith weren't in Africa (мне кажется там was, ну не знаю...)

Kate's father wasn't in America