If the quote is at the end of the sentence, a period should be placed inside the end quotation mark. If the quote does not end the sentence, a comma should be placed inside the end quotation mark and the sentence can be continued. Put a comma inside the ending quotation mark if there is a dialogue tag after what the person says. A dialogue tag shows who is speaking (he said/she said). Use a period or exclamation point if there is no dialogue tag following the quote.