1.he(just buy)....have just bought....a car         2. We ( visit) .......visitted.................him last year     3. This room ( clean)...........cleaned.....................yesterday               4. My father ( be) ......have been..........a teacher since he (be)...was....20    
5. These trees ( just grow) .....has just growed..........................

2he just bought a car
2. We visited him last year
3. This room was clean yesterday
4. My father has been a teacher since he was 20 years old
5. These trees are new

1.he has just bought a car       
 2. We visited him last year   
 3. This room was cleaned yesterday     
4. My father has been a teacher since he was 20    
5. These trees have just been grown