It's time to review verb tenses! Go to http://englishpage.com/verbpage/presentperfect.html
Study the page explaining how to use the present perfect tense.
Do Exercise 5
Print your answers (Control/P command)
Then check your answers and correct them (see "Check" and "Hint" boxes at the bottom of the page)
Reprint showing correct answers. Bring all pages to school to show me.
Arrange to Skype with me, so I can interact with you as you complete the exercise online. Then you will not have to print out the pages.