我這樣理解對嗎

Otherwise如果用在句首，表示“否則”
He should pay you. Otherwise, you can sue him。
他應該付你錢，否則你可以告他。
如果用在句尾，代表“另一個角度，”源自Fox播出的Bones
You are a great person. If he says different otherwise, tell him to go to hell.
你很了不起，如果他不同意，讓他見鬼去吧。