Turn on/off
Incorrect : Please leave/shut the light.
Correct : Please turn on/off the light. Or Please turn the light on/off.
Note: You can also say 'switch on/off the light'. But when we refer to a lamp or candle, we should say:
Please light the lamp/candle.
Please blow/put out the lamp/ candle.
Similarly:
Incorrect : Open your dress.
Correct : Take off your dress. Or Take your dress off.
