Can you explain how to use commas and punctuations in a sentence?
user
What do you mean by punctuation?  Can you tell me a little bit about what you’re trying to say?  Then I’ll be able to give you more precise instructions.
assistant
I mean punctuation marks
user
What punctuation marks do you mean, specifically?  How can I use punctuation to say what I want to say?
assistant
what is the general rule of punctuation marks?
user
There are many different rules, depending on the type of punctuation.  Do you want me to teach you the rules about commas?
assistant
yes
user
I can give you a few examples, and then you can try to figure out what you want to do.  I’ll give you a sentence where I’ve used a comma in the correct place, so you can see what the punctuation should look like:

The thief was caught before he had a chance to steal the old lady's purse, which was in the pocket of her coat, which was hanging on the hook beside the door.
assistant
Can you explain how to use commas and punctuations in a sentence?
user
What do you mean by punctuation?  Can you tell me a little bit about what you’re trying to say?  Then I’ll be able to give you more precise instructions.
assistant
I mean punctuation marks
user
What punctuation marks do you mean, specifically?  How can I use punctuation to say what I want to say?
assistant
what is the general rule of punctuation marks?
user
There are many different rules, depending on the type of punctuation.  Do you want me to teach you the rules about commas?
assistant
yes
user
What is the sentence you want to use them in?  How would it be punctuated?  Can you give me an example?
assistant
Can you explain how to use commas and punctuations in a sentence?