Parallel Construction in
Lists
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Lists must use the same form throughout a sentence.
If a list begins with a gerund (the -ing form of a verb), all items
in the list must be gerunds; if a list begins with an infinitive (to +
a verb), all items must be infinitives.

Elliot has a number of hobbies: fishing, dancing, and
gardening.
Vilma made a list of things she wants to learn next
month; she wants to know how
to knit, to swim and to
ride
a bicycle.

In lists using infinitives, only the first to is necessary. The
second part of the sentence above could be rewritten this way:

She wants to learn how to knit, swim and ride a bicycle.

Lists that begin with an adjective must contain all adjectives,
lists that begin with an adverb must contain all adverbs, and
those that begin with nouns must contain all nouns.

The sea was calm, warm, and blue. (adjectives)
Working
quickly, calmly, and efficiently, the Red Cross
workers were able to care for all of the earthquake
victims. (adverbs)
Food, water, and shelter are essential to human life.
(nouns)
Is this sentence
correct?
The Gallo triplets
like to bike, catch
frogs, and eating
cake.
The boys are smart,
funny, and mostly truthful.
The boys are freckly,
happily, and bubbly.
Remember!
Word forms should
be the same in a list.
Answers
The sentence under the top left picture is incorrect: to bike and catch are infinitives, but eating cake
is a gerund.
The sentence below the top right picture is
correct. There are three adjectives in the list; mostly is
an adverb, but it modifies the adjective
truthful.
The sentence under the lower picture on the right is
incorrect; all words in the list end in -ly, but
freckly and bubbly are adjectives, and happily is an adverb.
What do you think
about these
sentences?