Present Perfect

Auxiliary verbs – HAVE AND HAS
There are four cases
An action that started in the past and continues to the present
I have studied English for five years. (I’ve)
She has lived in Europe since 2010. (She’s)
They have worked at Microsoft for two weeks.
He has written his book since last Monday.

It expresses an indefinite time in the past.
Paul has visited Italy.
She has eaten Indian food.
They have studied German.
We have been in Canada.

It expresses frequency.
They have visited Europe three times.
She has watched “Ghost” four times.
I have eaten Japanese food once.
He has traveled to Canada twice.

It expresses an action that finished a few moments ago.
She has just called you.
They have just arrived.

Negative form
She has not (hasn’t) gone to Italy.
They have not (haven’t) watched “Ghost”.

Interrogative form
Have you played the drums?
Has your brother lived abroad?

Present Perfect