A comma is used to separate information from other parts of the sentence
1. Use a comma to separate items in a series. Use and before the last item if you list three or more items
2. Use a comma to separate an introductory word or phrase.
3. Use a comma to separate two sentence that are joined by conjunction such as and but or so
Periods
Use a periods to mark the end of a sentence. Put one space after a periods before starting the next sentence
Exclamation marks
Use explanation marks to stress an idea or show strong emotion
Question Marks
Use question marks at the end of q