Problem: Continue the following story.

Brian taught Michael in the classroom, because 
Here's how I want to continue it: Brian was the teacher and spent their time educating.

Problem: Continue the following story.

Erin helped put dry ice on Elena's driveway during the winter storm so 
Here's how I want to continue it: Elena paid out fairly.

Problem: Continue the following story.

When Tanya's dog ran away, Mary helped look for the dog. 
Here's how I want to continue it:
Mary was very helpful.