Commas are typically unnecessary when using the expressions “at some point”, “one of these days”, “sooner or later”, “one day”, or “someday” in a sentence.

At the start of a sentence, add a comma after the introductory phrases “in the middle” or “in the middle of...”.

At the beginning of a sentence, we usually place a comma after introductory phrases, such as "in the end", "at last", "by the end of...", "at the end of...", or "at the latest" to make the sentence clearer.

At the start of a sentence, you can optionally add a comma after “at the beginning of...”, “at the start of...”, “in the beginning”, or “at first” to avoid confusion, add emphasis, or signal a pause. In case of doubt, use it to help readers understand the meaning of the sentence.

When introducing a sentence with an adverbial participle phrase, add a comma after it. In the middle or at the end of a sentence, commas are frequently unnecessary.

When introducing a sentence with an infinitive phrase, add a comma after it. In the middle or at the end of a sentence, commas are generally unnecessary.

When starting a sentence with an adverbial clause, place a comma after it. If the adverbial clause follows the main clause, commas are generally unnecessary.

At the start of a sentence, add a comma after a sentence adverb to signal that it modifies not the word that follows but the entire sentence that follows.

When meaning "I hope", use commas to set off the sentence adverb "hopefully". When using "hopefully" as a regular adverb, we do not generally place a comma to separate the adverb from the word (verb, adjective, or adverb) it describes.