Punctuation

 

Commas

The comma ( , ) is a very popular punctuation mark. However, because "too many commas make writing choppy; too few create misunderstanding" (Venolia, 1995:14), we need to be careful with the usage of commas. Here are the ways commas are used:

for separating items in a series;
between coordinate adjectives not joined by and (c.f. Adjectives);
to indicate the boundary of independent clauses that are joined by the conjunctions and, but, for, nor, or, so and yet (Venolia, 1995:14);
for separating a dependent clause that comes before an independent clause;
to separate sentence elements for purposes of emphasis or clarity;
in the writing of direct speech;
not to replace conjunctions in the joining of two or more independent clauses (c.f. Run-On Sentences);
not used interchangeably with the semicolon;
not to separate an independent clause and a dependent clause when the former comes first.