Answer:
Present perfect continuous tense. (interrogative sentence)
Step-by-step explanation:
The present perfect continuous tense is also known as the present perfect progressive tense.
Present perfect continuous tense shows that something started in the past and is continuing at present. The present perfect continuous is formed using the construction has/have been + present participle root (+ing).
It uses auxiliary very, for example -
has been or have been + present participle.
E.g.
Nancy has been teaching at the school since January.
I have been waiting here for three hours.