eassure vt.可以看的出来re再保障或放心
Ex:I will reassure you that the deal I have will be complete.
assure vt.担保
I can assure you that the festival will be open at Saturaday.
ensure vt.确保
I`ll ensure you from his personality is straight.
insure vt.可接受...保险
You could insure from the insurance company`s life time benefit.
assure在美国地区通常是讲一个状况.
ensure通常是讲一个人的人格,人品等.
insure在英国地区通常是讲投保的意思.在美地区就跟assure是同义词