when to put commas around something
Commas always follow these clauses at the start of a sentence. If a dependent clause ends the sentence, however, it no longer requires a comma. Only use a comma to separate a dependent clause at the end of a sentence for added emphasis, usually when negation occurs. 3. Use commas to offset appositives from the rest of the sentence. Appositives act as synonyms for a juxtaposed word or phrase.