the subject and the verb and give whatever answers you are able, and whatever answers you wish the other person to know.
there are two sets of questions to ask.
one set for the verb phrase.
you obviously cannot give the information that you don't know; and you don't give the information that you do not think you want the other to know.
your task as a writer is to fill in the answers to as many of these questions, as you can, or as you want to, for each simple sentence.
now you can answer any or all the following questions.
what kinds of mistakes happen?
"the people are working" is the simple sentence.
now you can, 