If he/she turnS off the light, you will sleep

Also, "turns out" and "switches off" are commonly used in English.

I'm getting these wrong on purpose just so I can report that the English has errors. Why is that not a reportable option when getting them correct?

Well, at least so far the if he/she sentences are consistent. Wrong, but consistent, unlike other parts of this course. I'm going to continue reporting each one of these the first time through the lesson.