• Problems with Commas


    A compound sentence contains two or more independent clauses which are joined by a coordinating conjunction such as: and, but, for, nor, or, so, or yet.  Or, the two independent clauses could be joined with one of the conjunctive adverbs.


    The 1991 eruption of Mount Pinatubo destroyed many homes, and it led to the closing of Clark Air Force Base.


    Not all birds fly south for the winter; for instance, cardinals live in the northern states throughout the year.


    Use a comma after two or more introductory prepositional phrases or after one long introductory prepositional phrase.


    Near the beginning of the trail, the scout leader found an overturned canoe.

             (1)                       (2)

    On the day when the last autumn leaf finally fell, I head out to the backyard with a rake and a trash bag.


    Use a comma after an introductory adverb clause or before any independent clause in a sentence.


    While the orchestra tuned their instruments, the stagehands checked the curtain.

                     (subject)  (verb)

    My friends came over, and as soon as we finished eating, we cleared the table for a game of cards.

                                                                  (s)     (v)

    Never put a comma before an adverb phrase that ends a sentence.

Last Modified on September 5, 2008