periodic-sentence

A **periodic sentence** is a sentence that is not grammatically complete until its end. Periodicity is accomplished by the use of parallel phrases or clauses at the opening or by the use of dependent clauses preceding the independent clause; that is, the kernel of thought contained in the subject/verb group appears at the end of a succession of modifiers. It is the opposite of a //nuclear sentence//.

The periodic sentence is effective when it is used to arouse interest and curiosity, to hold an idea in suspense before its final revelation.

“Out of the bosom of the Air, Out of the cloud-folds of her garment shaken, Over the woodlands brown and bare, Over the harvest-fields forsaken, Silent and soft, and slow, Descends the snow.”

This, the first stanza of Longfellow’s “Snowflakes,” is a periodic sentence. It begins with a succession of parallel adverbial phrases (“Out of the bosom”, “Out of the cloud-folds,” “Over the woodlands,” “Over the harvest-fields”), each followed by parallel modification (“of the air,” “of her garment shaken,” “brown and bare,” “forsaken,”). However, the thought is not grammatically complete until the subject/verb group “Descends the snow” finalizes the statement. - [|Wikipedia]