1. Started in the past, still going on
now2. something is about to start or just finished
3. happened in the past, still visible now
4. Time in the past is not important
>> for, since, in, just, lately, recently, yet <<
[have/has] + [past participle]
[have/has] + not + [past participle]
[have/has] + subject + [past participle]?
Examples:
I have done multiple jobs for you.
She hasn’t talked to me since our fight.