assure 强调“向保证，使确信” 常用于assure sb of sth 或assure sb that 结构中。 They were assure that everything possible was being done.已经向他们保证，正在尽一切努力 ensure 强调“确保某事发生”，常用于ensure sth,或ensure(sb)that结构中
Registration ensures delivery of mail.挂号寄邮件保证会送到。 insure主要的意思是“保险，投保”The old man's house is insured against fire.那位老人的房子投保了火险 r
reassure 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
