Question

The teacher said to Mala Don't waste your time on wasteful gossips​

Answer 1

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The teacher advised Mala not to waste her time on wasteful gossips.

Explanation ↴

When we report an advice in indirect speech, we use different forms of words such as advice, forbid, exhort or urge. When we use reporting verbs such as advice or forbid, no conjunction is used to introduce the reported speech. We do not say, The teacher advised Mala that not to waste her time on wasteful gossips.

Answer 2

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The teacher said to Mala Don't waste your time on wasteful gossips

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The Teacher Told Mala Not to waste time on wasteful Gossips.