Explanation:
4
a.I have not been there.
b.you have not worked very hard.
c.she has not visited paris this year.
d.We have not bought a new car.
5
a.ever
b.never
c.before
d.already
e.yet
6
a.I have worked today.
b.We have bought a new lamp.
c.We have not planned our holiday yet.
d.where have you been?
e.He has written five letters
f.She haven't seen him for long time.
g.Have you arrived at school?
h.School have not started yet.
I. I have been in France for 2 years.
j.She haven't played with her brother yet.