Ann is sining a song now.1) Is Ann sining a song now?2) What is Ann sining now? Who sining a song now?3) Ann is sining a song now, isn't she?4) Is Ann or Jane sining a song now?My friends live in Moscow.1) Do my friends live in Moscow?2) What do do my friends in Moscow? ( do и do должны повторять так как первый do - это вспомогательный глагол, а под вторым do подразумевается, что они делают там)Who lives in Moscow?3) My friends live in Moscow, don't they?4) Do my friends or my parents live in Moscow?