I would greatly appreciate it if we could change our appointment to March 6 at 3:00 pm.
I appreciate your invitation, but...
I greatly appreciate your kindness.
I'd appreciate your help.
I deeply appreciate your advice and kindness.
I appreciate your problem.
I'd appreciated your help.
His abilities were not appreciated in that school.
I appreciate it, but I think I shouldn't.
I greatly appreciate your efforts during our festival.