system
joyful: My dog was missing for two days.  When I came home from work, she was standing at the front door!  I thought I had lost her for good.
human
My dog had been missing for two days.  Then she suddenly was at the front door when I got home!  I thought she was gone for good.
human
That is a miracle.
human
I know!  I could not believe it.  I was so happy.
human
I hope you make sure the dog is on a leash from now on.