Haven't
 
 
 
I haven't met him before.
I haven't eaten lunch yet.
I haven't seen him lately.
I haven't seen Tom lately.
I haven't seen you in ages.
I haven't seen you for ages.
I haven't seen Tom since 1988.
I haven't seen you in a long time.
You've put on weight, haven't you?
I haven't seen him for a long time.
I haven't heard from him for a long time.
I haven't the faintest idea what you mean.
I haven't been back here since the incident.
Scientists haven't found a cure for cancer yet.
I haven't eaten French food since I left France.
I haven't eaten since breakfast and I'm very hungry.
I haven't been back here since that unfortunate incident.
You have wanted to go there for a long time, haven't you?
I haven't decided yet whether I'll go to college or get a job.
I'm pretty hungry since I haven't eaten since early this morning.
I haven't heard anything from him since then. I wonder what in the world he's doing.