1
we have been 
we have walked
we haven't stayed
we have slept 
we have saved
we have buy
have been
hasn't enjoyed 
2
has she spent a lot of... no she hasn't
has she tried windsurfing..  yes she has
has she read a lot of books.. no she hasn't 
has she made a lot of.. no she hasn't
has she gone to an.. yes she has
3 
.. i have tried windsurfing, i have swum in the sea and also i have gone to an internet cafe. i haven't read a lot of books. i have so much fan in the algarve. it's a pity but i haven't made a lot of new friends..
4 
they have decided
they have not sent
they have spoken 
dad has found
mum has made 
she has not chosen 
they haven't buy