1) We (have been living ) in Almaty since 1999.
2) He looks tired. He (has been working ) in the garden for 3 hours already.
3) Why are you so late? I (have been waiting ) for you for an hour.
4) Since when have you (been studying ) at this school?
5) The children are in the yard. They (have been playing ) there for 2 hours!