H2: Comma with Introductory Word or Words

H2: Commas with Introductory Word or Words: Use commas after introductory a) clauses, b) phrases, or c) words that come before the main clause.  See Writing for Success Section 3.1 pp. 101-102 or RULE 2 the following: https://www.iue.edu/hss/writingcenter/documents/Commas.pdf

Introductory clause:

When Joe was finally ready to go to work, he realized his wallet was gone.

Introductory phrases: 

Near a small stream at the bottom of the canyon, we discovered gold.

Introductory word: 

Nevertheless, Bob was overjoyed when he learned he had won the lottery.

Introductory phrase that modifies the subject: 

Expressing her individuality, Vanessa stormed out of the room.