Question

Convert in indirect speech:
He said to her,"why do you read this book"?

Answer 1

He asked her why she read that book.
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Answer 2

ANSWER:  

           “He asked her why she read this book.” is the indirect speech.

EXPLANATION:

  When we change interrogative sentences from direct to indirect speech the words ‘said’/’said to’ gets converted into ‘asked’/’enquired’/’demanded’.

  So here the direct speech - He said to her,"why do you read this book"? ; gets converted into indirect speech as - He asked her why she read this book. ; where ‘said to’ changed into ‘asked’ as ‘said to’ is the reporting verb in the sentence.