M>я исчо знаю:
M>this fish has a thin fin,
M>that fish has a thick fin,
M>this fish is a fish, that has a thinner fin, than that fish.

Самая прикольная (на слух, как минимум), это, имхо:

How much wood would a woodchuck chuck if a woodchuck could chuck wood?
A woodchuk would chuck as much wood as a woodchuck would if a woodchuck could chuck wood.

За правильность написания не отвечаю