[usr] My friend was nice enough to let me use his car yesterday. [sys] That is nice to gave a friend that can help you in time of need. [usr] After I returned it, I realized I had forgot to fill it back up with gas.  I feel bad. [qst] [None] [bhv] [None]
That is not good but my mistake happened.
My friend let me borrow his car yesterday.  I forgot to fill it with gas when I was done with it.