What is the longest 1-word sentence?

I recently discovered the wonderful grammatically correct "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo" sentence and I was curious if it is possible to construct a longer, but still grammatically correct, sentence using only one word?

• What if we allow bending the word any way we want, like tense,
  plural, etc. (e.g. "Ducks ducks duck duck")?
• What if we also allow conjunctions ("but", "and", "or", etc.)?