I must be seeing things. 我一定是见了鬼。 I'm not a man of superstition, but I've seen strange things. 我并非迷信的人, 但我的确亲眼见过怪事。 A:I'm afraid I've seen a ghost. 我想我遇到鬼了。
B:There are no ghosts. 哪有鬼这回事? There are no such things as ghosts. 世间绝无鬼怪的存在。 Don't be afraid of the dead. It's the living that will harm you. 不要害怕死去的人,活人才会伤害人。