Save guides, add subjects and pick up where you left off with your BBC account. Narrator: Oh no Brain! They're not the same thing at all. In fact they're really quite different. A hyphen is used ...

Use commas to offset appositives from the rest of the sentence. Appositives act as synonyms for a juxtaposed word or phrase. In the above example ... t end in "ly," such as "when" or "while ...