Examples
你說不定知道他的名字？
Do you happen to know his name?
Source: Tatoeba
她年輕的時候說不定是個美女。
She may have been beautiful when young.
Source: Tatoeba
如果我運氣夠好的話，說不定會贏。
I may win if I have luck.
Source: Tatoeba
湯姆到了現在還沒來，說不定是沒趕上火車。
Tom may have missed the train. He hasn't come yet.
Source: Tatoeba
我一个月没见到小王了，他说不定已经回国了。
I haven't seen Xiaowang for a month now; perhaps he's already gone back to his own country.
Source: Tatoeba