Present Perfect

Affirmative: Subject + have/has + Past Participle
Eg: Alan has crashed his bicycle into a tree.

Negative: Subject + haven't/hasn't + Past Participle

Eg: You haven't bought a new laptop.

Question: Have/Has + subject + Past Participle

Eg: Have you finished your homework?

When do we use Present Perfect Tense?

1. an action that occurred at an unspecified or unknown time in the past

Eg: We have visited Tokyo several times.

2. events that began in the past and haven't changed (for, since)

Eg: I have studied English since I was 5 years old.

3. an action that has just happened or has recently been completed.

Eg: I have just eaten my dinner.

4. talking about experiences (ever, never)

Eg: I have never eaten monkey brains before.

Difference between have been and have gone.

have been - journeys in the past.

have gone - a journey from which the speaker has not yet returned.