English Punctuation - Comma Usage - Nonessential Clauses

Comma use with nonessential clauses, phrases and words

1. Clauses that are not sentences.

2. Clauses that provide extra information.

3. The sentence makes sense with out the nonessential clause.

Comma usage with nonessential clauses:

Commas are placed before the nonessential clause, and at the end of the nonessential clause.

Examples:

1. My English teacher, is really nice, is going to give me a letter for college.

2. The boy, that was playing in the street, that got hit by a car was my brother.

3. My neighbor, that lives on the 2nd floor, is going to take me to school tomorrow.