We forgot to buy a mouse for the new computer.
REMEMBER
We DIDN'T REMEMBER TO BUY a mouse for the new computer.
I shouldn't have deleted those computer files.
REGRET
I REGRET DELETING those computer files.
We wanted to fix the printer, but we didn't succed.
TRIED
We TRIED TO FIX the printer.....
Jill hasn't used her phone since she got Skype.
STOPPED
Jill STOPPED USING her phone when she got Skype.