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The burn spots on TV gets ____ (maybe darker?) when you set the ratio to 21:9 causing the black bars on the top and bottom of the screen.

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mosjaThe burn spots on TV get darker when you set the ratio to 21:9, causing the black bars on the top and bottom of the screen to intensify.

Something like that.

Comments  
Students: We have free audio pronunciation exercises.

Why "intensify"?

That's because "causing" (which means "which causes") is missing something.

Your original sentence reads:

The spots get darker, causing the bars ...

Can you see how something is missing?

Fixed.


The burn spots on TV get darker because when you set the ratio to 21:9, the black bars appears on the top and bottom of the screen.

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OK.