Even You-Know-Who can't split himself into seven.

“I feel I owe you another explanation Harry," said Dumbledore hesitantly. "You m…”

“Oh, get out of the way, Percy,” said Fred. “Harry’s in a hurry.”“Yeah, he’s off…”

“Gilderoy Lockhart, Order of Merlin, Third Class, Honorary Member of the Dark Fo…”

“He might have been encased in a thick glass bubble, so separate did he feel fro…”