Verified answer

1 The cat has been chasing the mouse for two hours.
2 He has been copying the homework for three hours.
3 They have been taking care of a new garden since Monday.
4 They haven't been chatting in a forum since last week.
5 Ruslan hasn't been concentrating on the task for five hours.


1 How long has Dmitry been painting ?
2 How long has secretary been printing ?
3 How long have we been sharing a room ?
4 How long has the dog been running around?
5 How long has she knocking at the door?