Present Perfect Use

1 They have fallen in love, though both of them are married
-It happened in the past and has a consequence in the present.
2 We have already analysed the situation of the economic crisis
-It indicates an indefinite or incomplete time
3 We have started a new business that is keeping us very busy
- It started in the past and continues in the present
4 I have studied in this school for 3 years
- started in the past and continues in the present
5 The dog has eaten your dinner. You'll have to eat something else
-It happened in the past and has a consequence in the present
6 They have fallen in love, though both of them are married
-It happened in the past and has a consequence in the present
7 Have you ever thought of singing in a group? You've got a beautiful voice
-It indicates an indefinite or incomplete time
8 We haven't finished the project yet
-It indicates an indefinite or incomplete time.
9 Football has been my hobby since I was at school
-It started in the past and continues in the present
10 Some people have moved next door
-It has just finished or happened recently