Know myself! What kind of a sentence is that?

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• What did I do wrong? --
  Lear,...
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• What did you do when the ship sank?
  I grabbed a cake of soap and washed myself ashore...
• I don't know what's wrong with people!
  All I ask them to do is exactly what I tell them...
• Do you want to know what's wrong
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• Burns: So, what did you do this weekend, Smithers?
  Smithers: Well, I caught up on my laundry, wrote a...
• Now, what did I do with that flak
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• I saw what you did and I know who
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