Comma — English definition

A punctuation mark that signals a brief pause, separates items in a list, or sets off extra information.

Where it is taught

In use

Three punctuation marks exist mainly to control pauses and breaks — the comma, the em dash, and the ellipsis — and choosing among them is really choosing how you want a reader to slow down.

Punctuation: Comma, Dash & Ellipsis

Questions using comma

Problem 1

Which sentence correctly uses a comma to set off an introductory phrase?
  1. After the long rehearsal, the band finally packed up their instruments.
  2. After the long rehearsal the band finally, packed up their instruments.
  3. After the long, rehearsal the band finally packed up their instruments.
  4. After, the long rehearsal the band finally packed up their instruments.
Answer and explanation

After the long rehearsal, the band finally packed up their instruments.

A comma correctly follows the introductory phrase 'After the long rehearsal' before the main clause begins.

Problem 2

A learner writes: “A comma is a place where you breathe.” Explain the problem and produce a better response.
Answer and explanation

Base the mark on clause structure and meaning. Speech pauses vary, whereas independent clauses require a suitable boundary or conjunction.

Use the criteria to compare your reasoning, not to copy the model’s wording. A supported alternative interpretation may earn full credit.

Response criteria

  • Make an accurate, focused claim or revision.
  • Use a relevant detail or a clearly explained language choice.
  • Explain the relationship and recognize a relevant limit.

Problem 3

Using an assigned reading or one exercise source, write a developed response applying punctuation: comma, dash & ellipsis. Aim for 120–180 words; name the reading or reproduce the sentence you revise.
Answer and explanation

“After the meeting, we revised the plan; it needed a transport budget.” The introductory phrase ends with a comma, and the semicolon separates two related independent clauses. A complete response supplies context, a focused claim, a brief supporting detail, explanation, and a relevant qualification. Do not simply repeat this model.

Use the criteria to compare your reasoning, not to copy the model’s wording. A supported alternative interpretation may earn full credit.

Response criteria

  • Make an accurate, focused claim or revision.
  • Use a relevant detail or a clearly explained language choice.
  • Explain the relationship and recognize a relevant limit.

Problem 4

Correct this mistake in one or two sentences: “A comma is a place where you breathe.”
Answer and explanation

Base the mark on clause structure and meaning. Speech pauses vary, whereas independent clauses require a suitable boundary or conjunction.

Use the criteria to compare your reasoning, not to copy the model’s wording. A supported alternative interpretation may earn full credit.

Response criteria

  • Make an accurate, focused claim or revision.
  • Use a relevant detail or a clearly explained language choice.
  • Explain the relationship and recognize a relevant limit.

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Elsewhere

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