assure ensure insure reassure都含有一定的"保证"之意。
assure是向某人保证什么,后面跟somebody,再跟名词(物)或that从句;
ensure是保证,担保什么东西;后面跟名词(物)或that从句;
insure是“投保;给…保险;接受投保;承保”,经济术语;
reassure是assure前加了表示“反复,一再”的前缀,我们可以理解为“一再向…保证”,就是为了“使…安心;打消…的疑虑”。
assure例句:
1、He assured us of his ability to solve the problem.
他向我们保证他有能力解决这个问题。
2、We booked early to assure ourselves of(getting)good seats.
我们及早订座以保证我们能得到好座位。
ensure例句:
1、To ensure the child's quick recovery,the doctor gave him an antibiotic.
为使这个孩子尽快恢复,医生给他打了一剂抗生素
2、Registration ensures delivery of mail.挂号寄邮件保证会送到。
insure例句:
1、My house is insured against fire.
我的房子保了火险。
2、Are you insured for all risks?
你是不是给自己保了综合险?
reassure例句:
1、I was worried that my work wasn't good enough,but the teacher reassured me(about it).
我担心我的作业不够好,可是老师却让我放心。
2、The captain reassured the passengers about the strength of the ship.
那位船长向乘客保证船很坚固,要他们安心。