Help, help!

[Hellfighter 17]

If you are talking about punctuation in dialogue, I'm pretty sure that you have to capitalize after a period within the quatation marks, but when you use a question mark or exclamation mark, you can capitalize or not, as long as it pertained to who or how they said it, you can choose not to capitalize. I'm pretty sure of those things, also, some writers write different ways, I just pick these things up in novels and in English. I may have been wrong on some of those, but I'm pretty sure they are right, sorry if they are wrong, you can also adapt your own style, too, if you want, I have with commas, at least ^_^