Comma Between Subject and Verb

With few exceptions, a comma should not separate a subject from its verb.

My friend Cleo, is a wonderful singer.

Writers are often tempted to insert a comma between a subject and verb this way because speakers sometimes pause at that point in a sentence. But in writing, the comma only makes the sentence seem stilted.

My friend Cleo is a wonderful singer.

Be especially careful with long or complex subjects:

The things that cause me joy, may also cause me pain.

The things that cause me joy may also cause me pain.

Navigating through snow, sleet, wind, and darkness, is a miserable way to travel.

Navigating through snow, sleet, wind, and darkness is a miserable way to travel.