A conjunction is an invariable morphological unit which relates two clauses. Coordinate conjunctions can also relate two syntactic constituents which have the same syntactic function.
Test:
Given P,
clauses:
If
P + X + ![]()
or
P + , + X + ![]()
or
P + . + X + ![]()
succeeds, then X is a conjunction.
Examples:
Test:
Given P,
clauses and P + X +
:
If X cannot be moved inside
, then X is a conjunction.
Examples:
but:
Examples:
Test:
Given X an invariable morphological unit: If X cannot be preceded by a coordinate conjunction, then X is a conjunction (and not an adverb).
Examples:
but:
Examples: