A Concise Guide to English Grammar

Classical rhetoric gave names to patterns of sentence construction that achieve recognizable effects—patterns that skilled writers have used deliberately for centuries and that you already respond to as a reader. Where does the main clause fall? Does the sentence release its meaning early and then elaborate, or does it withhold the main point, building through qualification and detail until the final clause delivers what the reader has been waiting for? Does it mirror one half of itself against the other, creating the kind of balance that sounds inevitable in quotation? These are not ornamental options reserved for formal speeches. They are tools available in any writing context, and naming them makes them easier to use with intention.

Before looking at rhetorical sentence patterns, you need one more structural tool. An absolute phrase consists of a noun phrase followed by a participle (or other modifier), and it modifies the entire sentence rather than any single word within it:

Notice that absolute phrases have their own subject (its sails, her hands) that is different from the subject of the main clause. This is what distinguishes them from participial phrases, which share the subject of the main clause. Compare:

Because absolute phrases have their own subject, they are not dangling modifiers (Chapter 18). Dangling modifiers lack a subject and attach incorrectly to the wrong noun; absolute phrases state their subject explicitly and modify the whole clause. Skilled writers use absolute phrases to add vivid, simultaneous detail without subordination.

In a loose sentence, the main clause comes first, followed by modifying elements. Those modifiers may be participial phrases, absolute phrases, or other structures that add detail:

The ship sailed slowly, rocking gently, its sails catching the wind, the crew relaxing on deck.

In this example, rocking gently is a participial phrase (the ship is rocking), while its sails catching the wind and the crew relaxing on deck are absolute phrases (each has its own subject). The sentence accumulates detail after the main point, creating a relaxed, expansive feel.

In a periodic sentence, modifying elements come first, delaying the main clause:

Rocking gently, its sails catching the wind, the crew relaxing on deck, the ship sailed slowly.

Periodic sentences build suspense and create emphasis by making the reader wait for the main clause.

In a balanced sentence, parallel structures create balance:

Ask not what your country can do for you; ask what you can do for your country.