1) Mary saw a new film last week
Mary didn't see a new film last week
Mary saw a new film last week,didn't she?
2)The boy played in the park yesterday The boy played in the park yesterday,didn't he?
The bot didn't play in the park yesterday
Verbs(глаголы). nouns(им.сущ.) adjectives(им. Прил)
I think nouns are champions(я думаю им.сущ. Чемпион)
Ответ: The boys were playing basketball when i came to the sports ground.