It is fourteen years since I . . . . . . . . him.

saw
have seen
did see
had seen

The correct answer is D. had seen.

The sentence “It is fourteen years since I saw him” is in the past perfect tense. The past perfect tense is used to talk about an event that happened before another event in the past. In this case, the event that happened before is “I saw him.” The event that happened later is “it is fourteen years.”

The past perfect tense is formed with the past participle of the verb and the auxiliary verb “had.” The past participle of “see” is “seen.”

The other options are incorrect because they are not in the past perfect tense.

  • Option A, “saw,” is in the simple past tense. The simple past tense is used to talk about an event that happened at a specific time in the past. In this case, the sentence would mean “I saw him fourteen years ago.”
  • Option B, “have seen,” is in the present perfect tense. The present perfect tense is used to talk about an event that happened at an unspecified time in the past or that has an ongoing effect in the present. In this case, the sentence would mean “I have seen him at least once in the past fourteen years.”
  • Option C, “did see,” is in the simple past tense with the auxiliary verb “do.” The simple past tense with “do” is used to ask questions or to give commands. In this case, the sentence would mean “Did you see him fourteen years ago?” or “See him fourteen years ago!”

I hope this explanation is helpful. Please let me know if you have any other questions.