Which sentence uses past perfect tense?

Which sentence uses past perfect tense?

• A. Sam had worked at a university before he decided to become an actor.
• B. Sam had been working at a university before he decided to become an actor.
• C. Sam had decided to become an actor before he had worked at a university.
• D. Sam will have worked at a university before he decided to become an actor.

Answer: (A)

Past perfect is used to show an action that was completed before another past action. It’s formed with had + the past participle. In the sentence with “Sam had worked at a university before he decided to become an actor,” the action of working at the university is completed before the decision to become an actor. “Had worked” is past perfect, clearly signaling that order. The other options shift nuance or tense. “Had been working” is past perfect continuous, which still places the action before the past event but emphasizes the duration of that work. The sentence with “had decided … before he had worked” to pair two past-perfect clauses feels less natural and complicates the sequence. The one with “will have worked” uses future perfect, not past, so it doesn’t fit the question.

Past perfect is used to show an action that was completed before another past action. It’s formed with had + the past participle.

In the sentence with “Sam had worked at a university before he decided to become an actor,” the action of working at the university is completed before the decision to become an actor. “Had worked” is past perfect, clearly signaling that order.

The other options shift nuance or tense. “Had been working” is past perfect continuous, which still places the action before the past event but emphasizes the duration of that work. The sentence with “had decided … before he had worked” to pair two past-perfect clauses feels less natural and complicates the sequence. The one with “will have worked” uses future perfect, not past, so it doesn’t fit the question.