Put the verbs in brackets into the Present Perfect or the Present Perfect Continuous.

1. A: Have you seen dad? B: Yes, he's at the garage. He has been trying to repair the car for over an hour. 2. A: Have you known Ann for three years now? B: Yes, she has been studying with me for that long. 3. A: Bob has lost a lot of weight. Has he not been eating properly lately? 4. A: Have you cleaned all morning? B: No, I have just started.