Question

you have been waiting for me since two o'clock change into past perfect Continuous​

Answer 1

$\sf \pink{Answer}$

$\sf \pink {I \: was \: been \: waiting \: from \: 2 : \: 00 \: O \: clock . }</h3><h2>$

Answer 2

$\huge{\fcolorbox{pink}{cyan}{Answer}}$

=> You had been waiting for me since two o'clock.