Unit Three, Lesson Four
The Structure Comma with
When a phrase or clause expresses a strong contrast from the rest of its sentence, separate it with a comma.
The communicated antithesis might be a contrast of coordinate elements:
Similarly, a dependent clause might also express an emphatic contrast:
Usually, a dependent clause does not receive a structure comma when it follows the independent clause in a complex sentence. Notice in the example above, however, that antithetical dependent clauses do use the comma.
Another type of antithesis drastically revises a previous part of the same sentence. Instead of contrasting with a previous communication in the sentence, this technique replaces or significantly alters that previous communication:
An em-dash is sometimes used instead of a comma to emphasize the antithesis even more: We won the match—in our dreams, anyway.
Click on the option that correctly uses the comma with antithetical elements: