I think you have suffered from delusion.我认为你受骗了。
▲～+that-clause
She is suffering from the delusion that he will marry her.她错误地以为他会娶她，并受此幻念的折磨。

［派生词］ delusional adj. 迷惑的；妄想的‖delusive adj. 欺骗的；妄想的