Put the verbs in brackets into the present perfect or the present perfect continuous.
1 a: /see) dad?
b: yes, he's at the garage. ) to repair the car for over an hour.
2 a: ) ann for three years now.
b: /study) with you for that long?
3 a: ) a lot of weight!
b: yes, /eat) properly lately.
4 a: /clean) all morning?
b: no. /start).