Present Perfect

¿When to use present perfect?
Time Present Perfect is used to speak of actions begun in the past and still continue today. For example:

I Have been here since Monday.
To shape it, use the auxiliary HAVE, conjugated to the appropriate person (only changes for the third person singular), followed by the past participle, which is equal for everyone.

Look below BE verb conjugation.

TO BE
I Have Been
You have been
I've Been
She Has Been
It Has Been
We Have Been
You have been
They Have Been

present perfect structure:
  Subject + have / has + participle of main verb.
   I have (I've) work a lot today
negative
Subject + have / has + not + main verb in "past participle"
She Has Not Worked
question
Have / has + subject + participle +?
have I work?

example:

Have I heard the news?
l+a: yes,I have heard the news
l-a:no,I haven`t heard the news
s+a: yes, I have
s-a: no, I haven`t

Have we called the police?
l+a: yes, we have called the police
l-a: no, we haven`t called the police
s+a: yes, we have
s-a: no, we haven`t

Has he read that book?
l+a: yes, he has read that book
l-a: no, he hasn`t read that book
s+a: yes, he has
s-a: no, he hasn`t

Have they gone at europe?
l+a: yes, they have gone at europe
l-a: no, they haven`t gone at europe
s+a: yes, they have
s-a: no, they haven`t

Have I known her father ?
l+a: yes, I have known her father
l-a: no, I haven`t known her father
s+a: yes, I have
s-a: no, I haven`t