a) I have seen them playing.
b ) We have been to the stadium twice.
c ) They have known them for five years.
d ) John has cleaned the house.
e ) She has lost five kilos.
f ) We have typed two letters today.
g ) I have reduced my carbon output since last year.
h ) I have been very busy lately.
i ) Sue has already typed most of the reports her boss gave her an hour ago.
j ) She's the most respectable person I have ever met.
a )I haven't seen your wife.
b )She hasn't kissed me goodbye.
c ) We haven't read the book.
d ) It hasn't rained today.
e ) They haven't drunk their bear.
f ) I haven't printed the brochures yet.
g ) We haven't received all the replies.
h ) He hasn't finished the article yet.
i ) They haven't chosen the menu yet.
j ) He hasn't decided yet.
a ) Has she ever loved you?
b ) Have you really left school?
c ) Have they drunk the milk?
d ) Has he lost his mind?
e ) Have you ever sung this song?
f ) Has Joan baked a cake?
g ) Have we lived in Warsaw since 1997?
h ) Has Samantha ever had a boyfriend?
i ) Have I just seen a ghost?
j ) Has the teacher shout?