How to Write an Essay

Tips on Grammar, Punctuation and Style

Commas and semi-colons. If the rules you learned about commas and semi-colons don't mean much to you, forget them and try this: Read one of your sentences aloud and see where you would naturally pause, where you would draw a breath. If it's a short pause, like that just was, you probably need a comma. If it's a longer pause, but not quite a full stop (for which you'd need a period), you probably need a semi-colon; remember that whatever follows a semi-colon must be able to stand on its own, as a full sentence, like this one.

If you don't want your reader to pause, there shouldn't be a comma, there, because as, this demonstrates it's very difficult to figure, out, what you're saying when your punctuation, makes the sentence unreadable.

Your sentences shouldn't leave your reader hyperventilating from the constant shallow breaths that over-punctuation requires. Nor should they be gasping for breath at the end of a long, unpunctuated sentence. (Consider yourself responsible for your readers' cardiovascular health.)

Check your dashes and hyphens. When you're setting off a clause—this one is a good example—use the longer dash, called an m-dash. (You can indicate this dash with two hyphens—like this—if you don't have an m-dash function on your computer.) Be sure that the parts of the sentence that precede and follow the dashes would make sense even if you removed the dashes and the words they bracket. (In the example above, the sentence is readable with or without the clause inside the dashes.)

You can also use the m-dash in place of a colon if you want to emphasize more dramatically the words that follow: "The mantlepiece was lined with photographs of people she loved—her mother, her grandmother, a favorite aunt." Or you can use it to add a surprising element into a sentence: "Her family's photographs were displayed on the mantlepiece; there were pictures of parents, grandparents, and siblings—and of Muffin, a Yorkshire...