The direct speech form for `He asked me when the letter would come”-
He said to me,`when would the next letter come?`
He said to me,`when will the next letter come?`
Correct
He said to me,`when shall the next letter come?`
He said to me,`when the next letter will come?`
Explanation:
Correct Answer is: He said to me,`when will the next letter come?`