We're flying over the Atlantic Ocean.
are we flying over the Atlantic Ocean?
where are you flying?
are we flying over the Atlantic Ocean or the Black sea?
who is flying over the Atlantic Ocean?
we're flying over the Atlantic Ocean, aren't we?
I have been studying English for two years.
have I been studying English for two years?
who has been studying English for two years?
What have I been studying for two years?
I have been studying English for two years, haven't I?
have I been studying English on German for two years?