помогите составить 10 предложений в present perfect

I have alredy done my homework.
They have come back today.
We nave never been to England.
I have not seen my friends since the holidays.
My mother has not answered the letter yet.
I have already had my dinner.
I have been very busy lately.
They have not heard the news yet.
Have you ever been to this museum?
I have just sent the letter to my parents

1)I have done my homework.

2) You have talk me about this book.

3) He has understand me.

4) I have make your breakfast.

5) I have broken my arm.

6) I have visited London.

7)I have studied English since childhood.

8) I have broken my pencil.

9)He has been to America twice.

10)I have not traveled to Paris.