perfect tense

wew,my last material is perfect tense.This one of other tense
Usage :
1. To talk about a completed past action at a non- specific time
example : I have read that book before
2. It is used to express personal experience there is not a definite time given.
example : I have ever visited Surabaya.
3. To talk about something that began in the past and continues to the present.
example : I have studied in this school since last
June .