1. Direct Address:
* Yes, use a comma before a name when directly addressing someone.
* Example: "John, can you pass the salt?"
2. Appositives:
* Yes, use a comma before a name when it's an appositive (renames a noun).
* Example: "My friend, John, is a talented musician."
3. Lists:
* Yes, use a comma before a name in a list of two or more items.
* Example: "The winners were Sarah, John, and Emily."
4. Introductory Phrases:
* No, don't use a comma before a name that follows an introductory phrase.
* Example: "According to John, the project is on schedule."
5. Non-Essential Information:
* Yes, use a comma before a name when it provides non-essential information.
* Example: "The company, founded by John Smith, has been successful."
6. Titles:
* No, don't use a comma before a name that follows a title.
* Example: "President John Smith delivered a speech."
7. Dates:
* No, don't use a comma before a name that follows a date.
* Example: "July 4, 1776"
Remember: These are general rules, and there may be exceptions depending on the specific sentence structure. It's always helpful to consult a grammar guide or online resources for specific cases.