Can you give me some examples for Simple present perfect tense? Then explain it

- She has been crying for 15 minutes
- I have done my homework since 2 days ago
- He has gone to Bali since last week

Ket :
~ untuk subject tunggal, menggunakan "has" sedangkan untuk subject jamak menggunakan "have"
~ Menggunakan kata kerja bentuk ke-3
~ Apabila ada kata "been" setelah kata "has/have", menggunakan verb ing
(*semoga membantu)