求教英语中assure、ensure和insure的区别?

问题描述:

求教英语中assure、ensure和insure的区别?

assure通常人作主语 意为向某人保证 eg.I assure you they'll be safe with us.
ensure确保,担保 eg The book ensured his success.
insure 保险,投保 eg,He insured his house against fire.他为自己的房子保火险.