
The Present Perfect Continuous is used to talk about events which started in the past and may still be continuing now - this tense usually has a link to the present time.
subject + have / has + been + -ing verb
"He has been waiting for 20 minutes."
"The road is wet. It must have been raining." 
 "Have you been crying?"
"I have been working here for 6 months."
 "She has been learning English since she went to university"
"I have been watching the news every evening."
 "Her brother has been calling her a lot recently."