Repeating key words or ideas can emphasise points and make the text more cohesive. Parallelism, where similar grammatical structures are used, can also create a rhythm and link ideas together.
Like father, like son; he reads every morning, jogs every afternoon, and writes every evening.
The parallel structure is apparent in the repeated pattern of activities, each prefaced by every, followed by a time of day (morning, afternoon, evening), creating a balanced and rhythmic sentence. Notice too how parallelism requires repetition of the same part of speech (in this case three nouns morning/afternoon/evening and three verbs in the present simple – reads/jogs/writes).
Let’s take a look at some more examples.
She likes reading, writing and painting.
In this sentence, all the items in the list are gerunds (the -ing form of the verb used as a noun).
He was a prolific author, writing novels, creating poetry and crafting essays.
Here, all the items are present participial phrases (phrases beginning with an -ing verb).
When I went to the park, I saw a bird, I found a lost toy and I met a friendly dog.
In this case, all the items in the list are independent clauses (a group of words that can stand alone as a sentence).
A correlative conjunction is a paired conjunction that connects two equal parts of a sentence and shows the relationship between them. Common correlative conjunctions include the following:
either… or
not only… but also
neither… nor
whether… or
rather… than
both… and
Correlative conjunctions should follow the same grammatical structure to create a parallel sentence. Take a look at the following example:
Incorrect parallelism: We can neither wait for something to happen nor can we take evasive action.
Correct parallelism: We can neither wait for something to happen nor take evasive action.
This is associated with more formal and literary texts and is a common feature in well-known speeches.