The Matching Pair

One tiny interruption can make a sentence wobble. Miss just one punctuation mark, and the reader may join the wrong words together. But place a matching pair... and the sentence becomes instantly clear.

A parenthetical interruption adds extra information inside a complete sentence. Imagine the main sentence as a straight railway line. The extra phrase steps briefly onto the track, then the main sentence continues. Lift the extra words away. What remains should still make grammatical sense. Today, use a PAIR of commas to fence off one interruption. Put the first comma exactly where the interruption begins. Put the second where it ends. The two commas must match. A lone comma leaves the reader waiting. Watch out for apostrophes. An apostrophe can show missing letters in a contraction, as in can't, or possession, as in the bird's wings. It is not a tiny comma for marking an interruption. Other punctuation forms can sometimes show parenthesis, but they do not work identically in every context.

Let's work through an example. Here is the whole question. Add a matching punctuation pair to mark the parenthetical interruption in this sentence: The kingfisher a bright blue bird darted across the river. You may add punctuation, but you must not change the words. First, find the sentence that works without the extra detail: The kingfisher darted across the river. That is our main line. Now spot the interruption. The words a bright blue bird rename the kingfisher, but the sentence does not need them to stand. Place one comma after kingfisher, where the extra detail begins. Place its partner after bird, where that detail ends. Read the completed answer: The kingfisher, a bright blue bird, darted across the river. Remove the middle phrase again... The kingfisher darted across the river. Clear, complete, and correctly paired.

Remember: find the removable interruption, then mark both edges with the same suitable punctuation. For today's comma question, one comma opens the interruption and one closes it. Keep the pair together, and your reader will follow every sentence with confidence.