Using the Present Perfect Tense

have/has + past participle. 

Here are some examples of the past participle:

been      eaten
gone      played
done      read
become  written

We use it to talk about a something that started in the past and continued until now.

Examples:  I have been in California for 2 years.  (From 2 years ago in the past until now, I have been in California.  I didn't live in another place.)

or   Karen has gone to school everyday since she was 5 years old.  (From the time she was 5 years old -in the past- until now, she has gone to school.  She didn't stop going to school.)

1.  Jerry (play) basketball since he was young.

     Check Your Answer has played

2.  A:  How long have you done karate?  B: I (do) it for about 3 years now.

     Check Your Answer have done

3.  She was an ugly child.  Now she (become) a beautiful woman.

     Check Your Answer has become

4.  Stephanie (be) at the library all day.

     Check Your Answer has been

5.  Oh no!  The deer (eat) all of my flowers.

     Check Your Answer have eaten

6.  That little girl (read) all of the books on that shelf.

     Check Your Answer has read

7.  She said she (study) English for 8 years.

     Check Your Answer has studied

8.  Thomas and Bill (watch) TV since 8:00 this morning.