[Grammar] not to be / don't be

[yoriko520]

Teacher told the small boy _________ cheeky.

( not to be / don't be )

Which answer is the most suitable? Explain as well, thank you.

 

[SoothingDave]

If describing what happened, use "not to be."

If quoting: The teacher told the small boy, "don't be cheeky."

 

[yoriko520]

Thanks.