Question

He bought
some new books (interrogative)​

Answer 1

Answer:

Did he Bought some new books ?

Answer 2

Answer:

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♡ He bought some new books (interrogative)

▪︎ Didn't he buy some new books ?

More information :-

》 Interrogative sentence: Didn't he buy this book last year? Explanation: While changing assertive sentences without an auxiliary verb, it is changed to the interrogative sentence by introducing the auxiliary verbs of 'to do' like 'did/does' along with 'n't' after that.