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