Wǒ yǒu huà ɡēn nǐ shuō.
我有话跟你说。
I'd like to have a word with you.
Notes:
我(wǒ): I
有(yǒu): have
话(huà): words
跟(ɡēn): to, with
你(nǐ): you
说(shuō): to say, to speak
Example:
A:我有话跟你说。
Wǒ yǒu huà ɡēn nǐ shuō.
I'd like to have a word with you.
B:说吧。
Shuōbɑ.
Say it.