Comma with Introductory Word or Words
Jared Aragona
Commas with introductory word or words: Use commas after introductory a) clauses, b) phrases, or c) words that come before the main clause.
Introductory clause:
When Joe was finally ready to go to the library, he realized his wallet was gone.
Introductory phrases:
Near a small stream at the bottom of the canyon, we discovered the fossils.
Introductory word:
Nevertheless, Bob was overjoyed when he learned he had earned and A on the test.
Introductory phrase that modifies the subject:
Expressing her interest at the experiment, Vanessa said, “Wow!”
The MLCKRB (Master List Code Key and Rule Book): An English Grammar & Style Handbook by Jared Aragona, CC BY 4.0