499. Phrases which are used in the same construction and form a series are separated by commas where the conjunction is omitted. For example:
- Day after day, year after year, century after century, the class struggle has proceeded.
- The struggle in the mines, in the fields, in the factories and in the shops, will go on until labor receives the product of its toil.
CLAUSES USED IN A SERIES
500. Sometimes clauses are used without the co-ordinate conjunction and a comma is used to indicate the omission. For example:
- Do not moan, do not submit, do not kneel, do not pray, do not wait.
- Speak as you mean, do as you profess, perform what you promise.
RULE 2.
501. Explanatory and introductory expressions, words in direct address, parenthetical words and phrases, are separated from the rest of the sentence by commas.
Note carefully the following examples:
- Jaures, the great French Socialist, was the first martyr to peace.
- War having been declared, the troops were mobilized.
- No, I cannot believe you.
- Mr. Chairman, I desire to speak to the convention.
- We can, of course, give you the information you desire.
RULE 3.