What can you do to save electricity?

1. I can turn off the lights when I leave my room.
2 I can turn off the lights when I don't use the room.
3.I can turn off the lights when I don't stay in the room.
4. I can turn off the lights of my classroom when we leave for the music room.
5. I can turn off the lights of my room when I go to school.

6. I can turn off the lights when I go to bed.
7. I can turn off the computer when I don't use it.
8. I can turn off the computer when I am not using it.
9. I can turn off the lights when I do other things.
10. I can turn off the lights when I study in my room.
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I have made sentences. Would you check them? Correct errors, please.

1 - 8 are fine.

9 would be better if you write this:
I can turn off the lights when I leave to do other things.

10 doesn't make sense ... unless you study in the dark!

Sure, I'd be happy to help you check and correct your sentences. Here are the revised sentences:

1. I can turn off the lights when I leave my room.
2. I can turn off the lights when I'm not using a particular room.
3. I can turn off the lights when I'm not in a room.
4. I can turn off the lights in my classroom when we go to the music room.
5. I can turn off the lights in my room when I go to school.
6. I can turn off the lights when I go to bed.
7. I can turn off the computer when I'm not using it.
8. I can turn off the computer when I'm not using it.
9. I can turn off the lights when I'm doing other activities.
10. I can turn off the lights when I'm studying in my room.

These revised sentences sound more natural and accurate. They effectively convey different ways to save electricity.