insure ensure assure的区别：中文含义不同、用法不同。insure可作动词，含义为“投保、承保、给…保险”；ensure作为动词，含义为“确保、担保”，是指某种行为或事件的结果得以保证；assure作为及物动词，含义为“保证、使确信”，既可用来确证某事，也可表示使某人确信。
一、insure的含义及用法
insure作为动词，译为投保;给…保险;接受投保;承保。
例句：Luckily he had insured himself against long-term illness.
幸运的是，他为自己投保了长期病险。
The company can refuse to insure a property that does not have window locks.
保险公司可以拒绝为没有窗锁的房产提供保险。
He insured himself against failure by treating only people he was sure he could cure...
他仅仅治疗有把握治愈的病人，以使自己免于失败。
The insured value of the airplane was greater than its book value.
该飞机的投保价值高于它的实际账面价值。
二、ensure的含义及用法
ensure作为动词，译为确保;保证;担保。
例句：The book ensured his success.
这本书保证了他的成功。
Use a black pen on white paper to ensure good reproduction.
用白纸黑笔，以确保复印清晰。
We need to ensure the consistency of service to our customers.
我们对客户要确保服务的连贯性。
They are introducing new measures to ensure the smooth running of the business.
他们正采取新措施，以确保公司平稳运转。
三、assure的含义及用法
assure作为及物动词，译为保证;确保;使确信;向…保证;弄清;查明;使确定。
例句：We were assured that everything possible was being done.
我们确信是在尽一切努力。
He assured himself of her safety.
他确定她是安全的。
Victory would assure them a place in the finals.
胜利将确保他们能参加决赛。
What is the sum assured?
人寿保险额是多少？
I can assure you that the animals are well cared for...
我可以向你保证动物们得到了精心照顾。
