Why did you wake me up to tell me something that big? Now, I'll never be able to concentrate on my work! ✬

Turn off the television. I can't concentrate. ✬

You should concentrate on the road when you're driving. ✬

You should concentrate on one thing and learn to do it well. ✬

You've lost the ability to concentrate. ✬

I can't concentrate on my work because of the noise. ✬

Don't look out the window. Concentrate on your work. ✬

All you have to do is to concentrate. ✬

You only need to concentrate. ✬

Please stop talking. I need to concentrate on my game. ✬