promise
单词辨析：
指以口头或书面形式作保证、担保、承诺，含若违背则予以补偿之意。
I can guarantee that he will pay off the debt.
我可以保证他会还清债务的。
I can't guarantee I will finish the work before dark.
我不能保证天黑前完成那项工作。
The law guarantees equal rights for men and women.
法律保证男女平等。
指用言语承诺某事一定会发生或一定是真实的，以消除他人的疑虑或担心。
I can assure you that your daughter will be happy here.
我可以向你保证，你女儿在这里会很快乐的。
We assured the tourists of an enjoyable holiday.
我们使游客确信准能过一个愉快的假期。
较正式用词，指向他人保证某人或某事物可靠、没有问题等。
certify sb's honesty and reliability
担保某人诚实可靠
I certify on my honour that she is innocent.
我用名誉担保她是清白无辜的。
指保证一定会做某事或提供某物，或某事一定会发生，侧重于自己的主观意向，用言语使人感到放心。
He promised to return the money to me.
他保证把钱还给我。
He promised her that he would marry her.
他保证要娶她。
指以发誓的形式作出保证，或强调自己所说的是真话。
He swore that he would get his revenge.
他发誓要报仇。
I never touched his wallet, I swear!
我绝没有碰过他的钱包，我发誓！
He swore never to gamble again.
他发誓再也不赌博了。
相关例句：
Mind, I count on your keeping the promise.
听着，我指望你信守诺言。
In 1920 the great powers promised them an independent state
1920年，列强承诺让他们成为一个独立的国家。
In case I forget, please remind me of my promise.
假如我忘记了，请提醒一下我的诺言。
You shouldn't promise what's impossible
你不该许诺做不到的事情。
Promise me you'll take very special care of yourself
答应我，你会特别小心照顾好自己。
Had he lived up to his promise, he would have made a fortune in sponsorship money.
要是他遵守了诺言的话，他本应该已经从赞助费中赚了一大笔钱了。