Commas for clarity
English · Key Stage 2 · The School
More than a pause
Commas are often taught as a pause when reading aloud. That is true sometimes, but it is not the whole story. Some commas exist to stop a sentence being read the WRONG way — to protect its actual meaning from a reader who reads it too quickly.
A famous example
"Let's eat, Grandma!" is an invitation to dinner. "Let's eat Grandma!" — missing the comma — reads as something much stranger. The comma is not decoration here. It is the only thing separating an invitation from a horror story, and nothing else in the sentence changed at all, not one single letter.
Commas in a list
When listing three or more items, separate each one with a comma: "apples, oranges, bananas and grapes". Without commas, a list runs together and becomes hard to read: "apples oranges bananas and grapes" — a reader has to work out where one item ends and the next begins.
Read this sentence without any commas: "The dog ran to Sarah who was playing in the garden and her brother." It is genuinely unclear — was Sarah playing with her brother, or did the dog run to both Sarah and her brother separately? Add a comma to fix it: "The dog ran to Sarah, who was playing in the garden, and her brother." Now it is clear: the dog ran to two people, Sarah (who happens to be in the garden) and her brother. The comma did not just add a pause. It removed a genuine confusion about what the sentence meant, and nothing else about the sentence changed.