User blog comment:Zathronas/Author's Advice: Dialogue/@comment-10380701-20140208003300/@comment-24218038-20140208034256

You can use what I call the discussion and monologue. Basically what you say in a conversation and what you think are 2 different things. You can use both during a discussion. example:

"Did you see the murderer?" I asked

"No, he was clad in a cloak and I couldn't see his face" said the witness nervously

"That's s''trange, its the first mention of a cloak. Is he lying to me?" ''I though

Or you can use a similar technique called discussion and narration. same example:

"Did you see the murderer?" asked the investigator

"No, he was clad in a cloak and I couldn't see his face" said the witness nervously

No other witness had talked about a cloak, the investigator thought that the witness was hiding something. He decided to take a more agreesive approach.

"Okay, that's enough. I know you're hiding something, spill it!"

both ways add the thoughts of your protagonist into the conversation. You can even have your protagonist think the opposite of what he says.