PRESENT PERFECT CONTINUOUS TENSE.
1)We (live )in Almaty since 1999
2)He looks tired. He (work) in the garden for 3 hours already
3)Why are you so late?. I (wait) for you for an hour.
4)since when you (study ) at this school?
5)the children are in the yard. They (play ) there for 2 hours!

1. have been living2. has been working3. have been waiting4. have been studying5. have been playingФормула для PRESENT PERFECT CONTINUOUS: have/has + been + verb+ing