Page 906 - Wordsmith A Guide to College Writing
P. 906
Commas to Set Off Introductory
Words, Phrases, and Clauses
1 Use commas after introductory elements.
Use commas after an introductory word, phrase, or clause.
Examples of Commas Used with
Introductory Elements
Suddenly, the elevator jerked to a stop.
In the distance, a coyote howled.
Since the class did not meet yesterday, Hannah spent the day in
the library.
Practice 23-1 Using Commas