Syntactic breaks are also known as interruptions or grammatical disruptions. They can be used to create a variety of rhetorical effects, such as:
* Emphasis: A syntactic break can be used to emphasize a particular word or phrase. For example, the sentence "I never thought I would see the day when my children would be all grown up" could be rewritten as "I never thought I would see the day--when my children would be all grown up." The syntactic break created by the dash emphasizes the phrase "when my children would be all grown up."
* Humor: Syntactic breaks can also be used to create humor. For example, the sentence "The doctor told me I had a very rare disease. But then again, I'm very rare, too" could be rewritten as "The doctor told me I had a very rare disease, but then again--I'm very rare, too." The syntactic break created by the dash adds a humorous twist to the sentence.
* Tension: Syntactic breaks can also be used to create a sense of tension or suspense. For example, the sentence "I opened the door and stepped inside, and then..." could be rewritten as "I opened the door and stepped inside--and then..." The syntactic break created by the dash leaves the reader wondering what will happen next, creating a sense of suspense.
Syntactic breaks can be a powerful tool for writers. They can be used to add emphasis, humor, tension, or suspense to a sentence. However, it is important to use syntactic breaks sparingly, as too many can make a sentence difficult to read.