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Grasping the Grammatical Expletive

There is/are…, It is…: We often use these constructions in communicating, perhaps without being aware they have a grammatical classification, the expletive.

Expletives introduce clauses and delay sentence subjects. Unlike nouns and verbs, which have well-defined roles in expression, expletives do not add to sense or meaning; rather, they let us shift emphasis in sentences by using "filler." For this reason, expletives are sometimes referred to as "empty words."

There is/are and it is are the two primary expletive clauses. Because the words are unnecessary, sentences are tighter without them. Including the expletive depends on whether we want to delay the subject for emphatic effect. Note the nuance and intent in the following examples.

Sentence with expletive there: There is a toy airplane on the grass in the backyard.
Sentence without expletive: A toy airplane is on the grass in the backyard.

Sentence with expletive it: It is a fact that he is a former Elvis impersonator.
Sentence without expletive: He is a former Elvis impersonator.

The sentences with expletives stress the subject instead of the verb by postponing its normal syntactical placement. Examples of expletives for emphasis abound in English literature. Here is but one from Samuel Taylor Coleridge's poem "The Rime of the Ancient Mariner":

"There passed a weary time. Each throat
Was parched, and glazed each eye."

Coleridge uses the expletive there to emphasize "weary time" by having it follow rather than precede the verb.

Expletives' status as filler does have exceptions. For instance, when a sentence's subject is an infinitive phrase or a that clause, starting the sentence with the expletive it instead of the subject sounds more natural.

Original sentence: To train at least four weeks for the event is crucial. (less natural)
Sentence with expletive it: It is crucial to train at least four weeks for the event. (more natural)

Original sentence: That she will win the local election is certain. (less natural)
Sentence with expletive it: It is certain that she will win the local election. (more natural)

The expletive it also serves constructions that do not have a concrete subject.

It is cold outside.
It is getting a bit loud over there.
It could turn out to be better than we thought.

In using and understanding expletives, we also want to identify when there and it are not operating as such. There frequently functions as an adverb, and it is often a pronoun referring to an antecedent.

There as expletive: There are six members at the meeting.
There as adverb: Six members are there at the meeting.

It as expletive: It is a good idea to save money for the trip.
It as pronoun: Saving money for the trip is a good idea. It is something we should do. (The gerund phrase Saving money for the trip is the antecedent to which It refers.)

As illustrated, expletives can add style and even needed duty to our writing. At the same time, we should include them with reserve. Like the passive voice, they can weaken writing if used too freely. The occasional expletive with thoughtful placement can help keep writing rich and resonant.

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