(Correct). Explanation: The word concern can be either a verb or a noun. Present I concern you concern he concerns we concern you concern they concern. Perfect I have concerned you have concerned he has concerned we have ...

Is it concern or concerned?

The adjective form of concern is concerned. I am concerned. The past participle/past tense form of regret is regretted, but the adjective form is regretful. The past participle/past tense form of concern is concerned, and the adjective form is also concerned.

How do you use the word concerned?

The school's decision is being questioned by a group of concerned parents. Her family was very concerned for her safety. Voters are deeply concerned about the economy. a discussion that will be of interest to everyone concerned The lawyers called a meeting of all the concerned parties.