whom for subjects or objects of infinitives
An infinitive is the word to followed by the base form of a verb. Subjects of infinitives are an exception to the rule that subjects must be in the subjective case. Whenever an infinitive has a subject, it must be in the objective case. Objects of infinitives also are in the objective case.
The pronoun whom is the subject of the infinitive to believe.
Exercises:
Related topic: