Tolong di jawabmr Davin ( teach) Indonesian history since 2011(+)(-)(?)

Mr Davin has taught Indonesian history since 2011
Mr Davin has not taught Indonesian history since 2011
has Mr Davin taught Indonesian history since 2011?

+ Mr Davin has taught Indonesian history since 2011
– Mr. davin has not taught….
? Has Mr. Davin taught…?