.姑且认为你打的两个都是shout
shout at sb.:shout loudly,especially angry.
eg:only the other day I heard a boy shout and scream at his mother.
He was shouting insults at the lorry driver.
shout to sb.:shout loudly to sb. in order to let sb. know what is said.
eg:'He's down here!' she shouted to John.