Выполни пожалуйста задание

1. It is usual to have lessons on weekdays, but it is unusual to have lessons on Sunday.
2. Emma is polite to everyone, but her brother is sometimes impolite.
3. Jack is honest with his parents, while his dishonest friend often tells lies.

Как образованы противоположные значения:

• usual → unusual: приставка un-;
• polite → impolite: приставка im-;
• honest → dishonest: приставка dis-.

Все три предложения показывают противоположные значения прилагательных.