Somebody help me with these questions a. Can she speak Japanese? (Statement)
b. I did not see anybody in the park. (Interrogative)
c. I haven't submitted my assignment yet. (Affirmative)

A. She can speak Japanese.

B. Did I not see anybody in the park?

C. I have submitted my assignment.

Explanation:

When a question begins with an auxiliary verb, it can be converted into a statement by moving the auxiliary verb in front of the main verb. This is how the first question will become a statement:

Interrogative sentences are sentences that ask a question. The given negative sentence can be turned into an interrogative one by placing the auxiliary verb did at the beginning of the sentence.

To turn a negative sentence into an affirmative one, we need to remove the negation not. The adverb yet should be removed as well because it's not used in affirmative sentences such as this one.

can you give us the options