be entitled to 和 be obligated to有什么区别啊?

be entitled to 和 be obligated to有什么区别啊? be entitled to be destined to和be bound to有什么区别 be terrified to 和 be afraid to 有什么区别? be about to 和be to 有什么区别? To be和being有什么区别? be sorry for和be sorry to有什么区别? be afraid of和be afraid to有什么区别 be afraid to 和be terrified of 有什么区别 be use to和be use for有什么区别? be important to和be important for 有什么区别? be+adj.+to和be+adj.+with有什么区别?