Make a List Crystal Clear

Three things are about to tumble out of this school bag: a compass, a banana and a sock. But watch this... two small punctuation choices make the jumble effortless to read. Can you spot what each mark is doing?

When a complete sentence introduces a list, place a colon at the doorway. The words before it must make sense alone. Here, 'The bag contains' is complete. The colon announces that the items are coming next. Now separate the items with commas. Write a comma after 'compass' and after 'banana'. Before the final item, use 'and'. In a short, simple list, you usually do not need a comma before 'and'. Do not scatter apostrophes between list items. An apostrophe has a different job. In 'don't', it replaces the missing letter o. That is a contraction, not possession. In 'Maya's compass', the apostrophe shows that the compass belongs to Maya. Neither apostrophe separates a list.

Let's work through an example. An 11+ question says: 'Rewrite this sentence with the correct punctuation: For the science experiment we need a jar some soil three beans and water.' First, find the introduction. 'For the science experiment we need' can stand alone. So place a colon after 'need'. Next, identify the four items: a jar, some soil, three beans, and water. Put commas after 'jar' and 'soil'. Put one after 'beans' only if you choose the Oxford comma. Either style is acceptable, but stay consistent. We will use the simple style without it. The finished answer is: 'For the science experiment we need: a jar, some soil, three beans and water.' Check it from left to right. The colon opens the list. Two commas separate the first three items. 'And' links the last item. Every mark has one clear job.

Remember: a complete introduction can open a list with a colon, commas separate the items, and 'and' leads you to the last one. Read your sentence aloud once. If each item lands clearly, you have punctuated the list with confidence!