Question

He failed to win the first prize change into interrogative​

Answer 1

$\huge\underline\mathfrak\red{Answer:-}$

♥.Did he failed to win the first prize ?

Answer 2

Answer:

Explanation:

Most of the interrogative sentences either start with an auxiliary verb or with question words like who, where, why, how etc.  

The words ‘if’ or ‘whether’ is used to change an interrogative sentence beginning with an auxiliary verb.

When changing an interrogative direct speech to reported speech, the punctuation marks like a question mark, commas, and quotation marks are removed and replaced with interrogative reporting verbs like asked, questioned, enquired, queried etc.