помогите пожалуйста английский Present Perfect Continuos

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?