When to use parallel structure
In constructions with
Coordinating conjunctions
and, but, or, nor, for, yet, so (FANBOYS)
Correlative conjunctions
both . . . and
either . . . or
neither . . . nor
not . . . but
not only . . . but also
Other pairs with coordinating conjunction
as . . . as
just as . . . so
the more . . . the less
the more . . . the more
no sooner . . . than
so . . . as
whether . . . or
Special effects
Set up expectations for effect:
Create drama
Add humor