Present Perfect

Present perfect is one of the most important English verb tenses. STRUCTURESubject + Have/Has + (Not or Never) + Past Participle + Object

• I have eaten.
  
• She has not eaten.
  

      Contractions: 

Have + Not = haven’t                 
Has   + Not = hasn’t 

I have	I've
You have	You've
He has	He's
She has	She's
It has
We have	We've
They have	They've

                        QUESTIONSHave/Has + Subject + Past Participle + Object

• Have you visited Texas?
  
• Has she driven a motorcycle?
  

Answers:

• Yes, I have.
  
• No, I haven’t.
  

• Yes, she has.
  
• No, she hasn't.
  

USESActions in the past with no specific time.   

This means the time is unknown or not important.

• I have visited Montreal.
  
• They have tried sushi.
  

Activities that affect the present or continue in the present

• I have been a teacher for 10 years.  
  

(This person continues to be a teacher)

• She has always loved to read.          
  

(She still loves to read)


Present Perfect is used differently than Simple Past.

• I have been to England.                 (No time)
  
• I went to England last year.           (Time)
  

You can't use Present Perfect with time phrases.

Example:       
yesterday, last week, 3 days ago, when I was 16, etc.

You can use Present perfect with ever, never, once, several times, a few times, still, yet, already

Examples:

• I have eaten sushi yesterday.                (incorrect)
  
• I have eaten sushi 3 times.                    (correct)
  

• She has learned English 3 years ago.   (incorrect)
  
• She has never learned English.             (correct)