Which one of the following sentences is punctuated correctly?
A. The sea calmed; but no boats, left shore.
B. The sea calmed but no boats left shore.
C. The sea, calmed, but no boats, left shore.
D. The sea calmed, but no boats left shore.
The answer is D. You should always put a comma right after a pause in words. A had the comma the wrong place,B doesn't have one at all,and C has too many.