They are swimming in the river now (in the lake) Задать вопрос: общий вопрос, альтернативный вопрос, специальный вопрос, вопрос с хвостиком/разделительный, вопрос к подлежащему.
are they swimming in the river now.
are they swimming in the river or in the lake now.
they are swimming in the river now, aren't they.
who are swimming in the river now.
where are they swimming now