Wolontariuszem inglês:

She volunteered to help him.

Tom volunteered to help.

Tom volunteered to do all the things no one else wanted to do.

The students volunteered for community service.

Tom volunteered a good deal of his time to helping those less fortunate than himself.

She volunteered to do the job.

She volunteered to go to the meeting with him.

He was a benevolent old man who volunteered to mow his neighbors' lawns for free.