Sang or Sung?

That’s not quite how I use it. I would also use the simple past for action that is complete. “She sang the national anthem at many sporting events until she left town”. Or in an obit notice. Especially in an obit notice. Essentially, the simple past is the perfect tense (don’t let the names of the Latin tenses confuse the issue).

L’etat, c’est lui:

There was never a warlord in Great Erinnes and Brettland, no, nor in all Pike County like you, they say. No, nor a king nor an ardking, bung king, sung king or hung king.

Plus, another one I like, which doesn’t have as a good a hook into the thread, except for being great:

Timple temple tells the bells. In syngagyng a sangasongue.

Two guesses for who wrote these… [James Joyce]

One of the differences between American English and British English is that Americans tend to use the simple past in situations where BE speakers will use the present perfect.