is a common transitional word and often begins sentences. When it is used in the middle of a sentence as a coordinating conjunction like and
it is not followed by a comma unless the comma is one of a pair setting off a parenthetical expression: His political affiliations make no difference, but his lack of ethics does. The cast is nearly complete, but, our efforts notwithstanding, we lack a star.
See also and
. 2, 10.
is understood as a conjunction and the pronoun following it is understood as the subject of an incompletely expressed clause, the pronoun is in the subjective case: Everyone lost faith in the plan but she
(did not lose faith
). In virtually identical contexts, when but
is understood as a preposition, the pronoun following it is in the objective case: Everyone lost faith but her.
The prepositional use is more common. However, when prepositional but
and its following pronoun occur near the beginning of a sentence, the subjective case often appears: Everyone but she lost faith in the plan.
See also doubt