Which is the correct interrogative form of the sentence 'The dog bit the postman'?

Which is the correct interrogative form of the sentence 'The dog bit the postman'?

• A. The dog bit the postman?
• B. Is the dog biting the postman?
• C. Will the dog bite the postman?
• D. Did the dog bite the postman?

Answer: (D)

When forming a question about a past action in English, you use the auxiliary did, place it at the front, invert with the subject, and keep the main verb in its base form. From The dog bit the postman, the past action is signaled by bit, but in the question you don’t reuse the past tense; you use did and bite. So the correct interrogative is Did the dog bite the postman?

This keeps the past tense information in the auxiliary (did) while the main verb stays in its base form (bite). The other options shift tense or aspect (present continuous, future) or omit the proper auxiliary-inversion pattern, so they don’t match the original sentence’s past-time meaning.