January14 , 2026

Commas, Colons & Semi-Colons

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Over the past decade (and the entry of the “social media” generation into the workforce), I’ve noticed a sharp decline in the understanding of the role of certain types of punctuation.

Foremost among these is commas, colons and semi-colons.

Commas:

  • Separate items within a list of three or more:

“We packed clips, tubes, nuts, bolts and bars.” (Note omission of comma before “and”).

  • Separate two distinct components of a sentence:

“We can complete the work by the required date, provided there is no further delay in client approvals.”

  • Mark off any phrase or clause that interrupts the flow of a sentence:

“The scheme did not, and still does not, apply to salary earners.”

  • Mark off titles or identifiers:

“Southern Region Civil Manager, Jason Stevens, commented that (etc).”

Semi Colons:

  • Enable the extension of a sentence:

“The phrase will have little impact on the reader; by then he will be conditioned by it.”

  • Separate two related ideas or concepts within a sentence:

“He declined the offer; he refuses charity.”

Colons

  • Introduce a series of items: 

“The camper’s needs are:  tent, groundsheet, cooking utensils, stove, sleeping bag and waterproof clothing.”

  • Introduce an explanatory statement:

“This is the company’s plan:  To open a new factory in Belgium and save the extra cost of transporting the goods.”

  • Are an alternative to a comma in the introduction of a quote:

“Witness:  ‘I was not there.’ “

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