Question

They said to us,"You have helped us a lot." Change into indirect speech.

Answer 1

Heya mate...
The answer is...

They told us that we had helped them a lot.

Hope, it helps you...

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Answer 2

Answer:They told us that,"we had helped us a lot"

Explanation:said to will change into told,you will change according to the object of reporting verb:us-we.

Have will change into had..

Rest same