ABSTRACT
Comma (4.4-4.42)
Subject + verb [,] {and, but, etc.} subject + verb.
Subject + verb [no comma] {and, but, etc.} + verb.
Introductory expression [,] subject + verb.
Subject [,] transitional expression [,] + verb.
Comma (4.4-4.42)
Subject + verb [,] {and, but, etc.} subject + verb.
Subject + verb [no comma] {and, but, etc.} + verb.
Introductory expression [,] subject + verb.
Subject [,] transitional expression [,] + verb.