Meet The Objective Case

I keep having to correct this, so I'm putting it here instead of stabbing my Purple Pen of Doom through my lovely 22" flat-screen monitor.

The Subjective Case

-- A penguin rang the doorbell.

-- Bob asked me who rang the doorbell.

The Objective Case

-- I gave a herring to the penguin.
-- It was the penguin to whom I gave the fish.

Remember (reposting a joke I first posted in January 2008):

Knock knock.

Who's there?

Objective case.

Objective case who?

*No*! Objective case "whom"!