Question

I said to him what are you doing change into indirect speech

Answer 1

Hello!!

YOUR ANSWER
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I asked him what he was doing.

Hope you got it ✌

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Answer 2

Hola!

Here is your answer

Question - I said to him, " What are you doing?"

Indirect speech -

I asked him what he was doing.

Rules for converting a interrogative sentence to Indirect.

1. Said is removed and asked is used.

2. The inverted commas are removed.

3. The sentence is in past tense.

4. You don't use "that" for interrogative sentences. After asked you can use Whether/if

Hope it helps!