"admit doing sth" 和"admit to do sth" 的区别：
admit to do 允许去做某事(还未做)
admit doing 承认做过某事(做过了)
双语例句：
admit to do：
I was beginning to admit to myself that our marriage was rolling toward the edge of a precipice
我内心开始承认我们的婚姻正走向危险的边缘。
Up to two thirds of 14 to 16 year olds admit to buying drink illegally
14到16岁的青少年中多达2/3的人承认非法买过酒。
She would rather perjure herself than admit to her sins.
她宁愿在法庭上撒谎也不愿承认她的罪行。
admit doing：
Sometimes I have to admit that I am doing everything really hard time, not how I said that I own, and this may be my own uation of the past few years a bar!
我得承认有时候我在做每一件事情的时候真的很用心的，不是我说我自己如何的，这也许是我对自己这几年的一种评价吧！
Rising to the challenge of identifying and releasing your patterns forces you to admit that the way you have been doing things isn't working.
若要识别和打破你的固定模式，你必须承认，你业已习惯的行为模式是行不通的。
But even virtual events organisers admit that facebook-style networking will not replace doing business face-to-face.
但即使是虚拟展会主办者也承认，facebook风格的交流将不会取代面对面洽谈。