Pengertian dan contoh Present Perfect

Present Perfect adalah bentuk kata kerja yang gunanya untuk menyatakan suatu kejadian yang telah terjadi di masa lalu dan masih berlanjut saat ini.
Example  using yet, just, already :
Yet : I haven’t complete the picture yet.
Just : All day i was just reading a novel in the room
Already : I’ve already doing homework.
Example using for and since :
For : My sister has been hospitalized for one week
Since : The motor company has been estabilished since the ‘90s
Example using used to :
Used to : He used to have a car, certainly he have driver license