Question

Let him sing a folk song.(passive)​

Answer 1

Explanation:

While changing an imperative sentence in active form to passive form, the following rule is applied: Let + object + be + past participle. In this sentence, the object is 'song', 'be' is the verb and 'sung' is the past participle of the verb sing.

Answer 2

Answer:

let a folk song be sung by him.