Meaning trap
turn out
switch off (a light)
To switch off a light, especially when you leave a room or go to bed (mainly British).
phrasal verbB1common
Don't mix these meanings
Same phrase, different job.
switch off (a light)
To switch off a light, especially when you leave a room or go to bed (mainly British).
Hear it in context
Notice where the phrase sounds natural.
Could you turn out the lights on your way out?
I try to save energy, so I always turn out the lights when I leave a room.
Fix the pattern
One small grammar move makes it sound right.
Not: Turn out the light off.
Say: Turn out the light. / Turn the light off.
Use 'turn out' or 'turn off' — not both.