Comma After Introductory Adverbs and Transitional Words
The Comma
Rulebase Summary
Use a comma after an introductory adverb or transitional word at the beginning of a sentence (e.g., accordingly, actually, however, moreover, fortunately, frankly, naturally, obviously, etc.). These words often act as transitions between sentences or express the speaker's independent view. Do not set off 'hence,' 'thus,' 'so,' or 'yet' with a comma. For 'now' and 'then,' use a comma only if they are used conversationally (like 'well' or 'so') — not if they express time or sequence.
Examples
A. Actually I was not present when the agreement was signed.
A. Actually, I was not present when the agreement was signed.
Comma after introductory adverb 'Actually.'
A. However the report was never filed with the court.
A. However, the report was never filed with the court.
Comma after transitional word 'However' at sentence start.
Transcript Notes
When any introductory element cannot possibly begin a new conversation and provides a bridge to a prior thought, it must take punctuation. These elements link back to what has already been said and cannot stand on their own as the start of a conversation.
Style Guide References (2)
Morson's
BGGP