Помгите написать 10 предложений present perfect continuous tense

I have been doing my homework for 3 hours. I have been playing with my dog for 20 minutes. I have been walking with my friends. I have been cooking the dinner for 2 hours. We have been swimming at the sea. She has been singing for hour. He has been reading a very interesting book. My sister has been watching a fantastic movie. My parents have been working for 4 hours.