you already know the answer so what's the point of answering? hahaha
"I am making the cookies"
"I'd like to help you"
"your job can be mixing the flour"
"what else can I do to help "
"you can help me eat the cookies"
I think it is the a speaker's <span>behavior</span> knowledge both of the grammatical rules of a language and of the rules for appropriate use in social contexts
Hope i helped you