PRESENT PERFECT CONTINUOUS TENSE. 1)We (live )in Almaty since 1999 2)He looks tired. He (work) in the garden for 3 hours

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!