我保证你会过得很快活。用英语怎么说？

我保证你会过得很快活。

I guarantee you'll enjoy yourself.

guarantee

n. 保证，担保，保证人，保证书，抵押品；vt. 保证，担保；

例句
We cannot guarantee the accuracy of these figures.
我们不能保证这些数据的准确性。

ll

abbr. lines （复数）线，land lines 陆线，load line 负载线，lectiones (Latin=readings) （拉丁语）知识；

例句
And to the bonny Bann banks forever I ll bid adieu.
我对神发誓,我永远都不会说再见.

enjoy

vt. 享有，享受，欣赏，喜欢，使过得快活；vi. 使过得快活；

例句
They enjoy participating in a wide variety of activities, both locally and further afield...
他们乐于参与本地及外地的各种活动。

yourself

pron. 你自己，（用以加强语气）亲自，你的正常或健康的情况；

例句
You grew up in an agnostic household and have never been able to bring yourself to believe in God.
你在一个信奉不可知论的家庭里长大，一直都无法信仰上帝。