К предложению: they often go to the swimming pool on Sunday. Поставить все вопросы.
When do they go to the swimming pool? Where do they often go on Sundays? Who often goes to the swimming pool on Sundays? How often do they go to the swimming pool?
на какие ты отметки учишся
только честно
They often go to the swimming pool, are they? (tag question) Are they go to the smimming pool? Have they go to the swimming pool? Did they go to the swimming pool yesterday? Will they go to the swimming pool tommorow? Всё вроде