I was once stolen (of my belongs) by a thief.
短语:
steal /rob sb of sth
Many people have been stolen by thieves.
祝你开心如意!
stolen by the thief
许多人都被小偷 偷过东西 Many people have ever been stolen by the thieves
I was once stolen (of my belongs) by a thief.
短语:
steal /rob sb of sth
I once was been stolen .
Hope helps.
In my opinion,If you have been stolen,certainly by the thief,so I feel "was been stolen" is OK.It's not necessary to add "by the thief" .