his family's farm
I worked yesterday. I have worked there before.
worked
"worked" here is an intransitive verb, because it has no direct object. The sentence does not say what was worked by Luis. In the sentence, "Luis worked the problem very quickly.", worked is transitive because it has a direct object, the problem was worked.
The past participle of worked is also worked.
She worked in Paris.
There were mostly servents that worked for him/her.
The prefix for "worked" is "re-".
No, it is not. It is a verb form, and more rarely an adjective (worked = tooled or fashioned, as in worked metal).
When women started to work they worked in factories. They worked long hours for little pay.
WHO worked in the automotive industry?
The ancient Romans worked on the coliseum
Thousands of people have worked on radiation