Choose the correct form of verb.
Did you not _____ about the world Atlas.

Question

Choose the correct form of verb. 
Did you not _____ about the world Atlas.

Accepted Answer

Explanation:

1. **Correct Option: 3 (know)**

The sentence "Did you not _____ about the world Atlas" is in the past tense, as indicated by the auxiliary verb "did." In English grammar, when forming questions or negative sentences in the past simple tense, the main verb should be in its base form. This is because the auxiliary verb "did" already indicates the past tense, so the main verb does not need to be conjugated further. Therefore, the correct form of the verb to use here is "know," which is the base form. Hence, Option 3 is the correct choice.

2. **Why the Other Options are Incorrect:**

- **Option 1: knew**
     The verb "knew" is the past tense form of "know." In the sentence provided, the auxiliary verb "did" already conveys the past tense. Using "knew" would result in a grammatically incorrect construction because it would redundantly apply the past tense twice, which is not standard in English grammar.

- **Option 2: known**
     The verb "known" is the past participle form of "know." Past participles are typically used in perfect tenses or passive voice constructions, neither of which apply to the sentence in question. Therefore, "known" is not appropriate in this context.

- **Option 4: knows**
     The verb "knows" is the present tense form of "know" used with third-person singular subjects. Since the sentence is structured with "did," which indicates a past tense question, using "knows" would be incorrect as it does not align with the past tense context established by "did."

In summary, Option 3 "know" is the correct choice because it correctly follows the grammatical rule of using the base form of the verb after "did" in past tense questions.