Choose correct negative sentence: I did not sing a song., I did not sang a song., I does not sing a song., None of these
Choose correct negative sentence: I did not sing a song., I did not sang a song., I does not sing a song., None of these
Explanation
In negative past tense sentences with "did not," the main verb stays in its base form (sing).
Using "did not" already shows past tense, so the verb does not change.