worried

worried + by + noun
She was not too worried by the results.

worried + about + noun
She was worried about her son.

worried + about + -ing form
He was worried about losing his job.

worried + clause
He was worried he would not pass the exam.

worried + that + clause
He was worried that he would not pass the exam.

linking verb + worried
They became worried about his safety.

adverb + worried
They became increasingly worried about his safety.