talk to sb 意思是对某人讲话，介词to 表示"方向"，表示一个人要对另一个人讲话，但是不表示对方也需要讲话，主要是强调告诉某人什么事。
而talk with sb 则表达的是和某人一起谈论什么事物，与某人一起交谈，双方都要发表言论，相互沟通，介词with表示“一起 ”
而它们的区别就在于：
talk to 强调谈话的对象是”单向的”。如：I am talking to Tom.(强调"I"单方面的对"Tom 在谈话）
talk with 强调谈话的对象是”双向的”。如：I am talking with Tom.(强调"I"和"Tom"在相互谈话）
扩展资料
1、I could always talk to you about anything in the world
我总是可以和你谈论世界上的任何事情。
2、If you happen to talk to him, have him call me
如果你碰巧能和他说话，让他给我打个电话。
《柯林斯高阶英汉双解学习词典》
3、I want to talk to you, but it can wait
我想和你谈谈，但可以晚点再说。
4、One child shrinks away from me when I try to talk to him
当我试图和一个孩子说话时，他避开了我。
5、I want to have a talk with him alone.
我要和他单独谈一谈。
6、I'll need to talk with you, but there's no hurry
我得和你谈谈，但不着急。
7、Before the wedding, I had a heart-to-heart talk with my mother.
婚礼前，我和母亲好好谈了谈心。
8、I didn't talk with him about it.
我没和他谈过这件事。