The present perfect tense is used for past events with a connection to the present and unfinished time.
Past events with a connection to the present examples:
I have lost my keys.
Mary has fixed my computer.
I haven’t read the book.
Unfinished Time examples:
I have lived in Raleigh since 1965.
Have you lived here all of your life?
Constructing the Present Perfect Tense
|1st Person||I have eaten||We have eaten|
|2nd Person||You have eaten||You have eaten|
|3rd Person||He has eaten||They have eaten|
|1st Person||I have not eaten||We have not eaten|
|2nd Person||You have not eaten||You have not eaten|
|3rd Person||He has not eaten||They have not eaten|