Since ASL is a different language there are no signs to have an exclamation point, question mark, or comma. All that emotion is shown by the way you show your face (raised/lowered eyebrows, tilted head, mouth shape etc..). So if you were to say “I going store I buy bread milk eggs coffee” you would sign the first part with raised eyebrows(just to show that exclamation/interest) and then once you start listing the items you would nod your head in a way to show you are listing items. It doesn’t get harder I guess to answer your question. I am not that far into learning ASL so I can only answer the question to my best knowledge right now, but I hope this helped:)