An expanded sentence is one that begins as a simple, compound or complex sentence but then adds additional information, sometimes with phrases and sometimes with clauses, mimicking the way we speak. Here are some examples.
In the past, writing was more formal than spoken language, and to a degree it still is, even in the US. While we say, “It’s me,” in formal writing we are expected to write, “It is I.” Most of us say “who” when we mean “whom” and say “hafta go” when we would write “have to go.” But in the late 20th century, writing became more informal. One example is that today the word “you” is allowed in essays.
What is happening? Modern-day writing is following the lead of spoken language, becoming more like it. When we speak, we often start with a simple idea (Gershwin wrote many songs), but then we add to those words as we are thinking (Gershwin wrote many songs, such as Summertime, I’ve Got Rhythm and Swanee, becoming the best song writer of the 1920’s—although Cole Porter fans might disagree).
The effect of expanded sentences is to create informal writing. The sentences sound friendly, not academic. These sentences are often easier to understand than complex sentences of the past with many subordinate ideas. They have an easy-going, relaxed quality to them which puts us at ease.
One way to practice writing these kinds of sentences is to type them on your computer and one by one change the words, keeping the grammar and flow but changing the meaning.
A caution: An expanded sentence is not a compound sentence with several independent thought sadded on. (I went to the store, and I bought a candy bar, and I ate the candy bar, and it was delicious.) It can include a compound sentence, the but add-ons vary in type.
It’s spring. Update your writing with some bright, extended sentences.