1. This answer was edited.

    The teacher said to me,"Do not tell a lie" (direct speech) The teacher advised me not to tell a lie (indirect speech) While changing imperative sentence reporting verb is changed according to the sense of reported speech i.e, it is changed into advised, suggested, requested,ordered etc.

    The teacher said to me,”Do not tell a lie” (direct speech)

    The teacher advised me not to tell a lie (indirect speech)

    While changing imperative sentence reporting verb is changed according to the sense of reported speech i.e, it is changed into advised, suggested, requested,ordered etc.

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