Recently, my lumbago has been so bad that I can't concentrate on my work.

Nowadays, he goes to the gym every day.

Don't you think his behavior has been strange lately?

He is studying hard, concentrating for the exam.

He is concentrating on studying for the exam.

He is looking for a new job.

I work hard every day.

I thought his behavior was really cruel.

I think his behavior is unjust.

I think his actions are completely inhumane.