I'd like to talk to you about a personal matter.
我想和你谈点私事。
Have I picked a bad time to talk to you?
我是不是挑了个不恰当的时间跟你谈话？
I made a mental note to talk to her about it.
我记着要去和她谈谈这事儿。
It would be better for him to talk to his parents about his problems.
他把自己的问题同父母谈谈会比较好。
He found it difficult to talk to members of the opposite sex.
他觉得很难与异性交谈。