English About Present Perfect

Present Perfect :
Showing action/event that started in past and continue right now.

Example :
- We have studied at Nusa Mandiri since 5 month ago.
- I have worked for Honda corp for 5 years.
- I have waited you for 3 hours.
- I have just eaten meatball.
- (+) John has just drunk a bottle of Coca Cola.
- (-)  John hasn't drunk a botlle of Coca Cola.
- (?) Has John just drunk a bottle of Coca Cola?.

Rumus :
(+) Subject + have/has + v3
(-) Subject + have/has + not + v3
(?) Have/has + subject + v3.

1. I have been at the campus since 10. a.m : Saya sudah ada dikampus sejak jam 10 pagi.
2. We have been unversity student of Nusa Mandiri for 6 months : Kita sudah menjadi mahasiswa Nusa        Mandiri selama 6 bulan.
3. You have been in my heart since last week : Kamu sudah ada dihatiku sejak mingu lalu.
4. We have just swam on the beach : Kita baru saja berenang di pantai ini.
5. How long have you been at campus? : Sudah berapa lama kamu ada dikampus?
6. How long have you know her? : Sudah berapa lama kamu mengenal dia?
7. Have you ever gone to London? : Apakah kamu pernah pergi ke London?
8. I have already done my task : Saya sudah mengerjakan tugas hari ini.
9. I have just watched this movie : Saya baru saja menonton film ini.
10. I haven't done my task yet : Saya belum menyelesaikan tugas saya.