Question

change into indirect speech (he said to him,"I do not think you are working hard."he replied,"you are quite mistaken , I am working hard."

Answer 1

here is ur answer buddy..
He told him that he did'nt think that he was working hard.
He replied that he was quiet mistaken,he wad working hard..
hope it helps u...

Answer 2

he told him that he did not thought he were working hard.

he replied that he were quite mistaken,he had working hard..

I HOPE THIS WILL BE HELPFUL TO YOU.....