age
I haven't seen you for ages!

clue
I haven't got a clue

faint
I haven't the faintest idea

finish with
I haven't finished with you yet!

have back
I still haven't had my book back

identify
...they haven't identified the causes of the accident yet

once
I haven't seen her once

penny
I haven't got a penny in my pocket

research
...our researches haven't been very successful

since
...and I haven't seen her since

sou
they haven't a sou

trust
I haven't much trust in his word

while
I haven't seen them for a long while

yonks
I haven't seen him for yonks